Holley G back in operation and boy am I glad!

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Model T Ford Forum: Forum 2012: Holley G back in operation and boy am I glad!
Top of pagePrevious messageNext messageBottom of page Link to this message  By Matthew David Maiers on Monday, September 17, 2012 - 08:55 pm:

a month or so ago i decided to experiment with a Holley NH, instead of using my Holley G.

what i found with the NH.

Faster excelleration

rougher idle at

car would pop on decelleration

car would not start without choke, and didnt like to crank start.

poor fuel economy

engine ran hotter.

And heres what i experienced with the G

Really smooth idle even down around 350 rpm,

Easy starting (first pull no choke)

quiet on decelleration

slower acceleration.

better fuel economy.

even though the NH provided faster acceleration, I still cruised at the same speed around 35-40 mph, the NH got about 18 mpg and the G gets about 22mpg. throughout my experimentation i messed with mixture setting the whole way, still with about the same result.

share your experiences!


Top of pagePrevious messageNext messageBottom of page Link to this message  By Mark Gregush Portland Oregon on Tuesday, September 18, 2012 - 12:53 am:

I had been using an Kingston L4 till I put the Schebler back on last weekend. I found (Kingston) that I could idle it way down and gas mileage was a bit better then ether of the NH's I have tried. Kingston and the G share one thing, they are really a puddle carb when not much air is passing through them. My acceleration was ok but my top speed was not as great, but part of that could be one of my coils was acting up. Could be my car and the aluminum intake but I have to choke what ever carb I have on. The L4 was fairly easy to start on magneto. Someday I will try a G just to compare. For now it's the Schebler, New day timer and aluminum intake. Depending on the mileage I get with the Schebler tomorrow in traffic it will ether stay on or I will go back to the Kingston.


Top of pagePrevious messageNext messageBottom of page Link to this message  By Matthew David Maiers on Tuesday, September 18, 2012 - 01:09 am:

i have an L4 i want to do some experimentation with, they have the flapper in them which really helps with the low rpm running.

the G has the weirdest design which probably creates alot of velocity thus atomizing the fuel well, but it lacks in breathability.

next i want to try a vaporizer for economy!


Top of pagePrevious messageNext messageBottom of page Link to this message  By Mark Gregush Portland Oregon on Wednesday, September 19, 2012 - 02:09 am:

Well the mileage I am not getting with the Schebler (less then 10 MPG city driving) I think the L4's going back on. :-(


Top of pagePrevious messageNext messageBottom of page Link to this message  By James J. Lyons III - West Virginia on Wednesday, September 19, 2012 - 07:43 am:

I have found the same to be true with the G. I get better power with it and it runs much better than when using an NH. I run the mountains all the time where I live so it is very easy to tell the difference.


Top of pagePrevious messageNext messageBottom of page Link to this message  By Bud Holzschuh - Panama City, FL on Wednesday, September 19, 2012 - 07:51 am:

I have only used the L4 but it seems to run and idle very well.

I'm wondering if anyone else with an L4 shares a quirk mine has. That is ..... it takes a LOT of throttle to start. I usually have to open the throttle about 90 % to start the car (hand cranked - no starter). Anything less than that and I'm just wasting my time and energy.

If its cold (by that I mean first start of the day), two pulls with the ignition off and choke fully pulled out, and then always starts on the third (non-choked) pull.

Cheers
schuh


Top of pagePrevious messageNext messageBottom of page Link to this message  By Matthew David Maiers on Wednesday, September 19, 2012 - 11:03 am:

ouch 10 mpg! :-( indeed

that is prtty odd that you have to start withe the throttle nearly wide open.

i usually start from a dead cold at quarter throttle, and sometimes richen the mix.


Top of pagePrevious messageNext messageBottom of page Link to this message  By Mark Gregush Portland Oregon on Wednesday, September 19, 2012 - 11:37 am:

Even cold with the L4 I only need about 1/4 to 1/3 throttle, couple 1/4 pulls to prime and usually ticks right off. For some reason it starts easier on mag hand cranking then battery with the starter, or so it seems!
Even if you need more throttle to start and if it goes good I guess I would live with it. :-) As someone says, your mileage (carb) may very!


Top of pagePrevious messageNext messageBottom of page Link to this message  By Erich Bruckner, Vancouver, WA on Wednesday, September 19, 2012 - 11:57 am:

Lets face it, none of us are using a factory new carb. All These are are subject to age, abuse, variable quality rebuilds (some passages still gunky?), etc. Makes it hard to compare oranges to oranges. I may try another carb one day, but I have such good results with the NH carbs. From start to idle to power to fuel economy, I can't see a reason to change. One day perhaps, in the interest of science (that's what I used to say before blowing something up or lighting it on fire).


Top of pagePrevious messageNext messageBottom of page Link to this message  By Darren J Wallace on Wednesday, September 19, 2012 - 04:06 pm:

I think the Holley G is a great carb. I enjoy rebuilding them and have done many for others.The only thing negative about them is they can be user unfriendly when it comes to rebuilding them if you don't have a few specially made tools and fixtures.Some of the threaded parts on the G have odd threads as well.
The great thing is about the NH,is they are much easier to rebuild.
I've used and liked both :-)


Top of pagePrevious messageNext messageBottom of page Link to this message  By mike conrad on Wednesday, September 19, 2012 - 04:51 pm:

Matt,Was the NH rebuilt? Try using a stomberg OF or a Rayfield if you really want to see a difference... Erich it's like comparing oranges to some exotic fruit found on a beautiful island somewhere.


Top of pagePrevious messageNext messageBottom of page Link to this message  By Erich Bruckner, Vancouver, WA on Wednesday, September 19, 2012 - 05:06 pm:

I would love to try an OF one of these days, just to see how sweet the fruit really is.


Top of pagePrevious messageNext messageBottom of page Link to this message  By R.V. Anderson on Wednesday, September 19, 2012 - 05:10 pm:

Luckily some schmuck has gone and made a run of G float valves from the Ford prints ;>)


Top of pagePrevious messageNext messageBottom of page Link to this message  By Matthew David Maiers on Thursday, September 20, 2012 - 09:48 am:

It was as rebuilt as I do it, cut new gaskets, thorough cleaning, replace parts as needed. The only thing I.could figure is if the idle circuit got plugged, or that the main jet.nozzle is so messed up I works like a garden hose.

An of would be nice to try, but they are gettin quite spendy. But just for the interest of science I'd like to try like a 30 mm mikuni carburetor and see just how good of mileage or performance it would have.


Top of pagePrevious messageNext messageBottom of page Link to this message  By Stan Howe Helena, Montana on Thursday, September 20, 2012 - 12:54 pm:


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