Just an idea I had,and I would like to bounce this off any of you that have had a problem with your Grose-Jet sticking shut and see what you think.

Do you use (at any place in your fuel system) the modern gasoline-proof lubricant that is available in some of the catalogs for tapered fuel shutoff valves, or have you installed a repro fuel shutoff valve (they are treated with this same product) previous to having problems?

If this stuff got loose and got into a grose-jet, it could cause all kinds of "sticking" closed, open, and improper operation problems and would not be washed away by gasoline.

The only thing I used on mine was an elbow with a shut off valve which goes into the inlet of the carburetor. This was purchased from Langs. Everything else was stock, or old equipment on the car when I got it.
Norm

Adam,
Used sparingly in a very thin film, the "fuel lube" as it is known in aviation, is wonderful for tapered shutoff valves.

Noel

If you replace the Grose Jet with a regular needle and seat assembly you will have no further problems. I don't know what the Grose Jet was originally designed for, but it is not solving any problems in a Model T carburetor.

Royce:

You have pretty well established yourself as a strict Ford parts T guy.

I'm using an original Ford inlet valve in the Vaporizor carb on the '26 & have the same problem with starvation & irregular running.........which is a recent problem after a year of running with the system. Cleaned hot plate, checked spray nozzle & gasket, no leaks after assembly & engine running.

A friend borrowed my straight thru NH to replace the Holley S carb on his '13 Runabout. My NH has a Grosse-Jet inlet valve & has not given any trouble running his '13.

I re-built a NH of his & I'm waiting to get my straight-thru back. I may change over to the standard manifolds & NH to rule out my starvation/surge problem.

The Grosse-Jet valves that I have used in NH & Vaporizor carbs have not given me or the owners any problem. Guess I'm Lucky ????????????



Bob Jablonski

Bob,

I like innovations if they are an improvement over the original part and invisible. The Grose Jet is invisible, but offers no improvement over a needle and seat. What's the point in using something that keeps causing so many people so much trouble? Adam has himself started two different threads about all the trouble he has been having in the past week with the Grose Jets.

Bob,
You stated: "Cleaned hot plate", did you check it very carefully for cracks?

BTW, there has been a gross jet in my two door since I bought it 5 years ago and never had a problem w/it.

Ken :

Thanks, I will check. Vaporizor has been as good as the NH, hate to change.

Royce:

You keep saying the Grosse-Jet doesn't work.

I & others have had no problems with the Grosse-Jet valve.

I'd like to hear from those who use & are happy with the part !!!

Ken Todd has been happy & so have I, with a Grosse-Jet valve in a NH, Vaproizor & the L4 Kingston.

What's your opinion on my NH straight-thru running my friend's '13 Runabout with no problems ???

I usually don't chime into technical matters in the presence of so many of my betters, but I will say - in response to Bob's specific request - that I put a Grose jet in my '24 Touring shortly after I bought it in 1996 (mostly because I didn't know any pros or cons) and have had no problem with it.

I have Grose Jet inlet valves in both carburetors on my Mini. Never a hint of trouble out of them.

Royce said: "I like innovations if they are an improvement over the original part and invisible. The Grose Jet is invisible, but offers no improvement over a needle and seat. What's the point in using something that keeps causing so many people so much trouble? Adam has himself started two different threads about all the trouble he has been having in the past week with the Grose Jets."

Royce- That is not what I have said at all. Please go back and re-read, or better yet send me a pm for my phone number. If you read my posts, they involve problem solving and are an attempt at "shedding a little light" on an issue that may not be what it seems. This particular issue is something that has been in the back of my mind for quite a while and I am attempting to gather some true facts. People are having problems with these Grose-Jets not working properly and I am 99.9 percent certain that the problem is not in the part. If you like using the stock needle and seat, that's fine. The main reason I like the grose jet, is that I drive my T so much that the normal action and the vibration wears a ring in my float needle and it seeps within two years time. I've also tried the neoprene tipped ones and they begin to intermittently stick shut by the time they are about a year old. Don't get me wrong though. I am with you about 99.9 percent of the time when it comes to keeping things stock. T's really do work better and last longer that way!

Best fuel valve lube i have found is ordinary hand soap.

Adam,

I've had a Grose jet stick shut while on tour, causing me to have to swap carburetors while ten other cars and twenty plus other people waited. This has never happened to me in many thousands of miles of driving with ordinary needle / seat assemblies.

I don't know how far you drive in two years Adam. I drive maybe 2000 Model T miles a year, but it is spread out between several cars. I have yet to see a new needle / seat fail, but I may only have 5000 miles on the one with the most mileage. This is still better than 30 - 40 miles, which is how long my most recent Grose Jet took to fail shut.

A reliability problem this severe is a serious matter. I'll disagree loudly anytime a Grose Jet is suggested.

Royce, You are welcome to your opinion and I thank you for contributing. I'm really not trying to make a determination about which style of float valve people prefer (that would be an opinion poll). In this forum thread I am trying to figure out something about a specific product: Why have problems been occasionally occuring with these? I am convinced that there is no problem with the product itself and that the cause of the issue is in installation, or something else in the fuel system is causing it. If someday a Grose-Jet is all that is available to put in your carburetor, wouldn't you too like to know what precautions need to be followed to insure it works properly?

I would like to hear from as many people as possible if you have had an issue with a grose-jet.
1 - did it stick open or closed?
2 - did you use any fuel valve lube in your fuel system?
3 - was your fuel system absolutely clean (new tank and new lines)
4 - any other info that you think might contribute to finding a cause.

Thanks!

I have purchased three of the gross jets and have removed all of them as they tend to stick closed. I agree that it probably isn't in the design I can spray them with carb cleaner and they will work for a while but eventually will stick shut. I believe it is something in the gas that is formulated for the east coast.

Adam,

I have had some trouble with a Grose-Jet sticking both open and closed. I have however never found an issue with the Grose Jet itself. They are simply very sensitive to any and I mean any foreign materials in the fuel system.

The fuel lube is something I use in all my cars on sediment bowl valves and shutoff valves. I have never found any in the Grose Jet causing a problem. Since all my cars are 1926's a new tank is not an option although I have cleaned and sealed all of my tanks and all 3 cars have new fuel lines on them.

Many folks suggest using neoprene seals instead of the felt ones in fuel lines. From experience I can tell you that if you takes the lines apart a few times you are bound to get shreds of neoprene in the system. They will stop up Grose Jet and needle valves similarly. Stick with the felt and make sure not to trap any in the line when you put them on.

Despite cleaning and sealing tanks the number one find on either type valve has been crud from the tank, seems it is always present except maybe in a brand new tank. With the amount of time these cars sit an awful lot of condensation builds in the fuel tank, Water will interfere with fuel flow in both types of valves as well. Of course condensation over time will find a way to make rust in a fuel tank as well, new or newly cleaned and sealed.

The only thing that has stopped the problem on my cars is an in line filter.

I hope my experience will be of some assistance to you.

Bottom line as I see it is you need to do what works for you and your specific car, this takes some hit and miss at times to find the solution.

Also I still run a mix of needle valves and grose jets in my cars and solved the issue as outlined above.

My Grose jet experience.Two new NH carbs,new or very clean fuel systems zero problems in two years.Model A with Tillotson stuck BOTH open and closed.Once closed during a parade.Held up the whole show for an hour long five minutes.Was able to jar it open by beating on carb.The crowd thought it was part of the act until I began to cuss.I believe it stuck because of something the tank had been sealed with.I put on a good rebuilt stock Zenith.

Adam,

The grose jet in my holly nh stuck closed and it took a lot of poking to get it unseize it... I reverted back to a needle and seat...

No fuel lube, but had a screen in the sediment bulb intact and an inline fuel filter... so no crud could get past...

Have setup the grose jet in my spare carb so will have another attemp with it again one day..

Cheers Simon

Adam,
1. It stuck closed.
2. Only Sta-bil used.
3. Could not blow it lose. (by mouth)
4. After probing it loose and using carb cleaner it stuck again immediately.
I think you will find different mfg times for the good ones and the bad. Like most things, the original is good then they think up a better (cheaper) way to mfg. This did happen after winter storage. It could have been due to the quality of our fuel, but that is part of the requirement for a good unit.

Royce:

uess you didn't read my post all the way thru.........

Please comment on my last line :


What's your opinion on my NH straight-thru running my friend's '13 Runabout with no problems ???


Thanks,
Bob Jablonski

Very good... It looks like we are getting some good data about circumstances surrounding failures, and some ideas. Lets please keep this thread a collection of data, and not let it turn into a "which one is better" match! Keep this thread going for a while, but only by posting whether or not you have had problems, and if you have had a problem, provide the following data:

1 - did it stick open or closed?
2 - did you use any fuel valve lube in your fuel system?
3 - was your fuel system absolutely clean (new tank and new lines)
4 - any other info that you think might contribute to finding a cause.

I have one on my truck. Was on it when I got it two years ago. So far, no problems. Tank had been replaced with a new one and the screen on the sediment bown is intact.

Bob,

Some people claim to smoke a pack of cigarrettes every day and still live to be 100 years old. I guess you fall in that category. There are lots of people having bad luck with the Grose jets. I've helped people in my local club fix their carb probnlems by removing defective Grose Jets and installing ordinary needle / seat asemblies.

The Grose Jet solves no problems, yet causes many.

Royce

With that sort of logic the people who smoke a pack a day and live to be 100 might have been smoking defective cigarrettes! (I couldn't resist).

Royce:

I can tell from your last post that you are really full if " IT " .

There are many in my area of New Jersey that have the Grosse-Jet inlet valve in their NH's, L-4's & Vaporizors that haven't had any sticking problems, either open or closed.

Could it be that all the defective valves were sent to your neck of the woods ?

I would still like to hear from those who haven't had any problem with the Grosse-Jet inlet valve.

And by the way, I never smoked anything...... except ham, fish,& jerky.

Bob Jablonski

Royce:


.........and you still haven't answered my question!

Bob,

I commented directly on the question
"What's your opinion on my NH straight-thru running my friend's '13 Runabout with no problems ??? " by answering:

"Some people claim to smoke a pack of cigarrettes every day and still live to be 100 years old. I guess you fall in that category."

In so many words, I am saying that the exception does not prove you right or me wrong. You have been very fortunate, lucky, blessed, odained or whatever - to have supreme performance from an object that causes a dozen times the amount of trouble compared to the part it replaces.

I hope this clears up the confusion in your mind on what I said.

No confusion here Royce.

What color is the sky in your world ??

Adam: In answer to your primary post, I do not use any fuel system lubricant on the fuel shut-off valve.

The only additive I use to the gas is Marvel Mystery Oil. Maybe that is what keeps the Grosse-Jet working so good.


Bob Jablonski

Bob, When I rebuild an engine, I recomend the purchase of a 16 oz bottle of MMO and that it be used at the rate of 2 ounces to every 5 gallons of gas until the bottle is gone. At that point, I feel the rings and valves no longer need the additional lubricant. I've, personally, never had a grose-jet problem (that I couldn't trace the cause of) on any of my cars, or cars that I have worked on. I've probably installed 30. Some were originals from the guy that started making them in the 1960's and some are the ones that are currently available.

Royce has brought up what might be a valuable point... Whatever seems to effect Grose-Jets in his neighborhood evidently does not effect a plain needle and seat (Yet).

As I mentioned earlier, the only NH plain needle and seat I've seen lately is neoprene tipped and they do not last more than a year or two in my neigborhood (in the T's or other engines I work on).

I have had a couple Grose-Jets clog up or shut off completly. I kind of figured out that one might have been sand blasted. that will do it.

Adam:

I had a Ford gas inlet valve in the Vaporizor on my '26,until yesterday. Problem..... gas overflowing from original Ford gas inlet valve sticking open. There was no visible obstructions, dirt or rust....no nothing.


Installed a new Grosse-Jet valve, no problems.




Bob Jablonski

Bob,

So the original inlet valve failed after 83 years of service. That is awful! I guess they don't make them like they used to

Royce:

Be well advised, yours may fail soon also !!!

I posted on this thread 7 times now. There are 13 posts from 13 different people offering the information I requested... Thank you for your input.

I would still like to see a few more people post about wether or not they have ever had any Grose Jet problems.

Bob and Royce: I started this thread in an attempt to get some information. Please stop posting your "back and forth" about "which one is better". I am asking with the greatest respect, I just can't think of any better way to word it.

This is just a speculation, not proven by me. Do you suppose the problem with the Grose jet is because of gravity feed? A fuel pump would give more pressure against the jet possibly forcing it open where There is not enough weight to open it with just the force of gravity? Does anyone who uses a fuel pump also have a grose jet? and if so do you have a sticking or leaking problem?
Norm

Norman:

On the "improved" Fords , excepting the 4 dr sedan, the cowl mounted tank would give more fuel pressure than the under seat tank.

I agree with the fuel pump speculation.


Bob Jablonski

Mine is an under seat '16'.

Ken Ward

I used a Gross-jet on my 23 & it worked very well. It was my understanding that the more recent units are not as good as the older ones . Anyone else have a similar experience?
Edward R. Levy

I have Russ Potter carbs with gross jets on both running cars. When they are used in the summer months I have zero problems. When sitting for 3-4 months over the winter they stick closed. Each spring I drop the bowls, remove the float, and give it a nudge. I know next winter the same will happen, but I consider that maintenance. I use Sta-Bil over the winter but still think it must be shellac. I would keep a needle in but it's hard to find an original needle that doesn't have a ring. The neoprene ones fit a lot looser in the seat. I wonder why no one makes a wider needle like the original? They both work but you choose your parts like you choose your beer. They all give the same effect but taste different.

Adam,

Three of the Grose Jet equipped carburetors which would not work in any of my cars were rebuilt by Russ Potter. One was a Kingston model L (1915 style) one was a straight thru NH, another a Holley H-1. In all cases my cars have either had the gas tanks cleaned by the local radiator shop or they are new, and all my cars have new steel fuel lines and the fuel strainers are either new or utterly clean.

I rebuilt a Kinston L2 and a couple Holley NH carburetors myself using Grose Jets. The problem with these rotten Grose Jets is just too frustrating for words. They might go 20 miles without trouble. In one case I made it to the driveway and then had to change the carburetor. Another time I went for a 30 minute ride, then the Grose Jet shut off the fuel 100 yards from my driveway. This is what led me to have Russ rebuild a few carbs for me, as well as the fact that I had no way to fix the Model L Kingston or the H-1 due to missing and unavailable parts. I beliecve there is no one who does better work than Russ Potter, and I believe it is not his fault the Grose Jet quality is so lack luster.

Over at Bud Scudder's house one day a few years ago we were trying to get his TT truck to run using an NH straight thru carb rebuilt by Russ Potter. We got it to run for 15 seconds then it wouldn't make a pop. No gas would come out of the carb bowl drain. We both looked at each other and simultaneously said "I bet Russ put one of those stinking Grose Jets in there" as if we had rehearsed it.

We dug through a pile of junk NH carbs from Bud's basement and found a decent looking needle and seat in one of them. It fixed the problem. Now the TT compression starts a dozen times in a row if it is warm.

Here in KY we don't have gasohol or E85, just regular gasoline. All the cars mentioned have the round tank under the seat, and when inspected the Grose Jets had no signs of dirt and no brass shavings. In each case a plain needle and seat, either rubber tipped or dug out of a junk carburetor, fixed the problem permanently.

I could go on and on with my Gross Jet experiences, this same story has happened a lot to many other people too.

A buddy of mine and I tackled a 22 touring that belongs to a chapter member. This car had sat for 10 years or so but the gas tank was clean. The carb (L4) was clean but the Grose Jet was stuck closed so hard I couldn't even blow into it to force it open. A shot from the air compressor would open it but even after soaking it in carb cleaner it wouldn't work reliably. This carb was like new being a rebuilt by someone.

I replaced the Grose Jet with a needle and seat.

One also needs to look at the mechanical ability of the owner of the car. For someone with limited ability, the Grose Jet is a mistake because when the car stops and acts as if its out of gas they are clueless until someone comes along that can figure it out for them.

The sticking shut of the float valve in a running engine I would say is common in the Grose Jet and not so much with the needle and seat.

Gary brings a bit of good evidence into this thread. If the carb had a 10 year old Grose-Jet in it, the part would have likely been an "original" from D&G Valve Co, not one of the ones currently being made. If we hear more reports like this one, it would prove that whatever is going on happens with both the "new ones" and "old ones", and may give us further clues into what is happening.

I bought all the bad Grose Jets about 6 - 7 years ago and still have two of them remaining. I believe they came from Chaffins. I don't know where Russ Potter bought his or if they came in the same packaging.

Here are the bad ones I still have:

Royce, saying that those particular ones are bad ones... Does that mean the ones from those particular packages had been installed, caused problems, and then you removed them? Those packages are not the ones currently being manufactured.

Adam,

I purchased all of them at the same time. All the ones I used were in similar packages, all marked as shown. The ones I used - both the packages and the valves - are long ago thrown into the garbage.

The two packages pictured contain brand new defective Grose Jets if they are anything like the other ones.

Where I work we have 3 running model T cars and 7 model A cars and trucks with the stock needles in their carbs.
They will all stick shut when left parked a few weeks unless we turn the gas off first and let the car run untill the carb rums low on fuel.
That will leave it set with the carb dry.
On early V8 Fords I have installed electric fuel pumps to break the needle loose when stuck as they have no fuel shut-off valve, but that dosn't work very well. We often have to beat on the carb or blow the needles loose with air pressure or simply start the cars once a week.
The problem seems to be the residue that is left when the fuel evaporates.

Aaron:

I also experienced a stuck stock inlet needle valve in the Vaporizor..... but only with about 2 gallons left in the cowl tank..... no problem with a fuller tank.

Could it be the re-formulated winter gas ?? I live in New Jersey.


Bob Jablonski

I'm sure it is reformulated gas. As to summer or winter I can't say. The weather here in Oakland isn't much different in the winter so I don't know if we only had problems in the winter.

I have grose jets in three cars, a 16 with a Holley G, a 12 with a Holley H-1 and a 10 with a Kinston 5 ball. All have grose jets and I have never experienced a problem. I do run in line filters.
Royce, you stated "In all cases my cars have either had the gas tanks cleaned by the local radiator shop or they are new, and all my cars have new steel fuel lines and the fuel strainers are either new or utterly clean."
I assume you do not run in line filters. Could it be tiny particles are causing your problems?
Why is it that some like myself have never had problems for many years with grose jets yet others can't seem to make it out of the driveway with them?
I don't drive my cars in the winter and take no more than the usual precaution of draining the carbs during the cold season. I live in California if that means anything.

Holley G
1. Grose-Jet sticks open very often (never sticks closed).
2. No fuel valve lube in the fuel system (new repro sediment valve).
3. Previous owner cleaned tank (looks fine) with new fuel lines.
4. Climate 40-50^oF min, 91 unleaded, brass float.
Standard needle/seat also leaked due to visible ring in needle.
I would much rather use a standard needle/seat (simple, easy to maintain) but I understand there's a problem with supply.

With todays gass Any type seat is liable to stick shut or open. I have had groce jets stick shut but mainly only after siting unused fore the winter. My complaint of them is they do not flow fule fast enough. Just ask the montana 500 runners. I will bet most run original seats fore better fule flow.
You need the least restriction of flow not only for speed. But with gravity flow fore hills and a tank that is not full.
Dean Yoder
P.S. I am converting to reconditioned originals.

I know this is a little off topic, but I put a Viton tip needle and seat kit in my NH in '06 and as yet have had no problems with it. I just fill the tank about 3/4 full when I park it, shut off the valve at the sediment bulb, and forget it till spring. So far no problems, fires right up. I live in N.W. MO., don't know if that makes any difference as far as fuel mixtures are concerned. May come back to bite me one of these days!!! Dave

Fuel Flow problems blamed on the Grose-Jet ??

Not so in all cases !!

I had a small gas seepage at the gas tank fitting where the sediment bowl attaches. Removed & cleaned the bowl. Observed that the open position, handle straight down, partaially closed the opening in the sediment bowl shut off valve.......... the holes were drilled off-center !!!

For a fully open sediment bowl shut-off valve, don't assume that it's fully open when the handle is in line with the bowl.

On mine, the handle has to be just to the right of center to be fully open.

Now no matter if a standard or Grose-Jet carb inlet valve is used, fuel flow is assured.




Bob Jablonski

David - If you have a repro sediment bulb, then there is some fuel valve lube in your fuel system... The shutoff valves on them are well coated with the stuff when they are new.

In-line fuel filters are the most likely thing to cause slow fuel flow in any CLEAN fuel system.
A really good micronite or paper fuel filter will restrict flow in a gravity feed system.
Anything that can get through the screen type filters is not likely to cause a problem as in goes through the float valve, even if it's a Grose-Jet valve.
I think what we have here is a fuel problem. In all cases.
I'm finding one to two inches of dark brown tar in the bottom of some of our gas tanks in cars that are only used once a year or less.

Richard Gould - I have no problems since replacing the Grose Jets with the more reliable needle and seat assemblies.

I've never used an inline filter. I have original Model T fuel strainers. I do sometimes replaced the screens after cleaning the sediment bulb. I don't see any signs of residue or particulate matter in my gas tanks when they are drained. Again, never had a problem in thousands of miles of driving with ordinary needles and seats.

We do have lots of severe hills around here. I can't go more than a mile or two from my house (depending on direction) without going up or down some fairly significant grades.

Talk to some of the folks who run the Montana 500. I understand the Ts won't go as fast with a Grose Jet due to restriction of fuel flow.

Adam, thanks for the info.
I presume a worn Holley G standard needle/seat can be reconditioned to not leak?

I've ordered a new Grose-Jet inlet valve today online from Snyder's....... have enough faith in the product to use in a new NH re-build. Will let you know reliability.

Bob Jablonski

David, I assume you could recondition one, but I would prefer to replace it.

The general consensus of the Montana 500 guys and other go-fast groups that I know of is that the Grose jet will not flow enough fuel for the NH swayback at high speeds. That is my personal opinion, too, but I don't drive wide open all day like they do. I don't use them any more. I fought one in a Marvel Schebler carb on a Ford tractor for two or three days and finally threw it as far as I could, dug around until I found an old style one and it has been in there for several years without problems.

Adam, I would prefer to replace it also but haven't found a vendor part number for it.
Standard needle/seat is available for Kingston (eg Lang's 6172 and Snyder's 6152/72) but not for Holley G that I can find.

Stan, that is interesting. I could see a TT falling into that category as well. I don't run my truck full bore all the time, but I'd bet it probably comes close on the road. Wonder if a stock float valve would run better in a truck than a Grose Jet?

To add to the list of non-Grose jet users is me, here was a post I made about it:

Wednesday, October 29, 2008 - 08:51 pm:
Remember posting a while back on Grose jet carb needle valves, those ones with the big and little ball bearing in the valve?

Well...here is my story for this week.

Went into the garage and heard a strange pouring sound, like something relieving itself.

Looked under the '24 Touring as gasoline was streaming out from under the car. Eeegads! Lucky, it had just started, so not much gas on the garage floor cardboard mat placed under for oil leaks. Turned off the carb located fuel shutoff. Thought that is strange, never did that before. So, I rolled it out and then opened the shutoff and started up the T to check, there in the driveway gasoline still poured from carb, right out of the air vent hole on the backside.

Took off the carb, thought the float must have a leak and be full of gas, nope, just fine. Removed the Grose Jet and it was sticky when slightly blowing thru it. Since I had my spare rebuilt carb, the grandkids wanted to ride, so on went the replacement carb. The T would not start, no gas to the carb. Loosened the carb fuel line and gas poured from the line....so the replacement was a bad carb too.

Took the replacement apart, and guess what? The Grose Jet in that one was stuck fast, could not blow thru it. That is why the carb wasn't filling up with gas.

Soaked both of the Grose Jets in carb cleaner for 2 hours. Then blew each with compressed air using a football inflating needle to get into the small holes around the orifice at the base. Got only one of the Grose Jets to work, the other one just stays sticky. Put the satisfactory for now one back in its carb, and the T preformed OK, at least for now.

So.....no more Grose Jets, these carbs were professionally rebuilt by a known source, but the use of Grose Jets must be his liking, not mine anymore, going to order the std Ford style tomorrow and replace these Grose things.

AND, from what I've read on the net, those Grose Jets are made in China, and the balls are not really round causing the valves to stick, here is one report:

Sometime in the 60's and 70's, whomever was now
manufacturing them (D&G?), went from using the better
quality european bearings, to ones manufactured in the
far east (probably at some insignificant amount of
savings).
Anyhow, the bulk of these grose jets were assembled
with ovular or scored far eastern ball bearings, which
often caused leakage. The company quickly got a bad
rep for selling defective merchandise and went out of
business in the 70's. BUT, before they did go out of
business, thousands of these defective units were
distributed or continued to be distributed. According
to Will, until very recently, any time he came across
a Grose jet, it was in a 70's or older style packaging
implying to him that the originals were still floating
around and making their way out of the woodwork. But
to his knowledge (being a parts ordering guru that he
is. He knew of no one making them since the 70's). The
ones he did get, about 50% of all customers came back
with leakage problems, and he eventually stopped
selling them at all, until recently.

Dan:

Have you had any problems with the straight thru NH you bought from me ?? I installed a Grose-Jet valve.

Bob Jablonski

This is somewhat off the topic and somewhat pertinent to it. I am today replacing the needles and seats in 4 Stromberg OF's that I either rebuild for people or rebuilt and sold in the last year, using the needle and seat conversion I have been making. I have had two problems with them not shutting off and letting gas leak and one complaint of not being able to get gas enough for high speed. I think that may be another problem but may be legit so I am replacing all the needle and seat sets with a new High Flow set with a Viton tip on the needle. Have done 9 carbs so far. Should have these four in the mail tomorrow. I think the Grose jet complaints in the tractors as well as the 500 cars revolve around lack of fuel at high demand rates. It could be that gravity feed is part of the problem. A fuel pump pushing fuel in might overcome any inherent problems in fuel flow in the Grose jet.

Stan you could br right,i have a Kingston L-4 with a Grose-Jet in my 26 coupe and i have never had a problem other than rust getting through the JD filter.I have been using it for five years.
Rick

For the past three years I have attended a "Mothers Day tour" in the same area of Ohio. It is rather hilly in the region and the first two tours I found as total lack of power on the hills. I removed the Grose-Jet and power was greatly improved to the point that I now used high gear on the same hills that the previous year I crawled up in low gear. Insufficient fuel flow was the culprit! Add me to the list of those who will not use a Grose-Jet. Your opinion may vary.

Jack, your OF is done and will be in a box in a day or two. You'll have so much power now you'll have to throttle back to keep from running over the cars in front of you.

Bike Trials
ZhiBike is the product of our sales agents, there are a variety of the latest style in 2009, including Forks,

Stems, Bashrings, Cranks(158m), Cranks(170m), Handlebars, Hub(Front,Disc), Frames(20), Frames(26) and more.

I have a rebuilt NH with standard needle that is sticking closed. I coated the tank bowl valve to prevent leaking a couple of weeks ago. Will catb cleaner fix it? Will higher fuel pressure (fuel pump) fix it?

Larry:

I had a standard inlet valve in the Vaporizor on the '26 & it too stuck closed.

Problem source must be this crap they say is GAS .

No modern car has a carburetor, it's all fuel injection under pressure.

If you have a sticking standard needle I've found the cause is usually a build up of varnish from the gas. Chuck the needle in a drill and with a wad of cotton, polish the tip. Should take care of the problem for at least a couple of years.

Back on April 5th I posted :

I've ordered a new Grose-Jet inlet valve today online from Snyder's....... have enough faith in the product to use in a new NH re-build. Will let you know reliability.


Part arrived last Friday.
Installed that new Grose-Jet inlet valve in a straight-thru NH carb on the '26 Runabout yesterday.

Engine started & ran as usual. Did not go for a ride..... New Jersey dew just a bit heavy.

Will keep you informed, positive or negative, of reliability of Grose-Jet in the next week & months.


Bob Jablonski

Holley G needle/seat
A carburettor specialist has modified a viton-tipped needle from a Motorcraft/Autolite 4300 carburettor (1970s/1980s) by trimming the (3) edges of the triangular body on a lathe. I understand the viton-tipped needle shouldn't stick closed where there is low fuel pressure (eg in a gravity feed system). A ball (from a ball bearing) was given a tap with a hammer (via a punch) to encourage roundness of the seat. I haven't installed the needle/seat yet.

Here it is late September & absolutely No problems with the valve.

Bob,
It may possibly be that you have had no problem because you have a 26. The tank is higher and has more pressure than on the earlier models. Also you have the valve under the hood so you don't need to put a new valve next to the carburetor.
Norm

Norman:

How's your '26 with the Grosse-Jet ?

I loaned my straight-thru NH to a friend to put on his '13 Runabout....... worked great, no problems even with the underseat gas tank..... Go Figure !!!

well...god bless you all...i always thought "two balls does the trick" sounded good...however my overall experience with the now infamous "gj"is that on the average, for me, on my carbs, they tend to stick..no, that's not really true, they stick period. open, closed..you name it.

now this is not just an isolated incident..this is over 40+ years...i'm talking all types of carbs, all types of fuel delivery systems, gas, methanol, mix...su's linkert's, zenith's, stromberg's...fords, chevys, english,german, french, italian [list available on request.]

i guess my main issue is that despite rabid following, is that, for me, grose jets fail in a binary manner ...they are stuck open or stuck shut...they don't dribble or wiggle back and forth. it's unacceptable.

for those that have had many trouble-free miles...well good for you. i can't explain the 13 runabout..clean living? good car-ma?..i dunno..i guess if it works in your car -keep it...over all they are a pain in the *** for me so i don't use them.

I have needle valves in all 3 of my T's.
Norm

The newer ball valves are made by Bill Stipe of Stipe camshaft fame. Quality is evident.

No problems with the new valves.

Nuff said !!


Bob Jablonski