I put the 25 Coupe on its big maiden voyage today after rebuilding most of the mechanical parts on the car over the past 30 months.
I installed a nylon 7 degree advanced cam gear only, the rest of the engine parts being from a fresh rebuild, of the usual aluminum pistons, s/s valves, seats, etc. No big time cam or high compression head as I have been using for several years.
Next to the Z-head I have put on the other cars, this advanced cam gear gave nearly as much low end torque improvement as the Z-head. Climbing hills and just going down the road was easy going. I have used fiber gears in the past with no success. I will be interested to know how this nylon gear does over the long haul. I know the engine noise or at least the cam gear noise is much reduced, I guess because of the nylon meshing next to the steel crank gear.
Whether using an aluminum adjustable or fixed fiber gear, the advance appears to be a big help.
I liked what I drove!!
Keep us updated. I have one that I will be using when I change out my cam for a regrind done by Rick Carnage.
who is making the adavnceable timing gears?
Tom, how is the top end power with the new gear? Mark, I think you mean Tom. I had the same idea for a winter project.
Jack White out of Pennsylvania is making the nylon advanced.
Lang's carries them. I bought a couple from them recently.
Tom:
Have run with the same cam gear for 3 years, about 4K MILES, NO PROBLEMS.
Advanced timing nylon gear that is .......
Are new gears for the generator and crankshaft also needed if a new advanced nylon timing gear is installed? Do steel generator and crankshaft gears work OK with the advanced nylon timing gear?
Just my.02.
If you are going to do a real rebuild of any engine why would you use worn old gears? I would only use new gears. What is the point of installing a new cam gear with a used crank gear? To put it in modern terms why would you install a new gear set with a used timing chain? I like to drive my T's and don't want to trouble shoot on the side of the road. Your mileage may vary.
just out of curiosity, how much would the cam advance if you simply andvanced it one tooth?
Matthew,
One tooth would be 15 degrees of crank shaft advance.
http://www.mtfca.com/discus/messages/29/46457.html?1201697928
Jim
I installed an advanced timing gear that my old friends Bill and Dennis set up for me in the old VERY tired engine that is in my TT that is on my profile picture. Along with rebuilt coils that we did, it ran GREAT! I am a firm believer in them. JMHO. Dave
Are we talking about 5-7 degrees here?
thank you jim, i would like to see one of the fully adjustable ones like stipe is making for the model As.
i would be very interested in seeing what effect degreeing the cam has on torque and horsepower curves.
from what i understand the original model t cam was masterfully designed, and very hard to improve upon for what it was designed for, however i could definetly see an improvement using a more high performance cam.
Stipe is making the adjustable gear for a model T.
I am running a belt driven alternator on this particular car so the nylon gear only is driving the cam shaft.
As far as top end goes, I really don't see much difference.
As far as the degrees of advanced, this is 7 1/2 or half a tooth. I don't know what a full tooth would do.
I am also running six volts with a distributor. I don't know if this makes sense, but it seems the sweet spot for the distributor is much closer on the quadrant than before. Just a little movement makes a BIG difference. I realize this is spark advance but it sure seems to have made it some different. I can come out of low gear much sooner because of the low end power. Seems to easily pick up speed when shifted into high at a much lower RPM.
It is just a real joy to drive.
Tom wrote,
'I don't know what a full tooth would do'
I don't either, but I rebuilt a engine that had been stored under a workshop bench for many years, stock standard and like new inside, couldn't find any reason why it was pulled other than the valve gear was out one tooth, I can't remember if advanced or retarded but it must have been a problem to scrap the engine.
Doug,
IMHO, I think Mark was correct in identifying 'Rick' as the machinist Carnegie and Tom is the parts department and MT 500 car building Carnegie.
George, yes I have been informed of this. Sorry Rick, didn't know about you, only Tom.