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Author Topic:   Carburetor hesitation
chief4car
Dirt Full Roller

Total posts: 56
posted October 17, 2001 03:49 PM
We chased an off idle hesitation all season long this year. We have been able to get it better, but the motor still hesitates on starts and restarts.
We have changed main jets, adjusted idle circuitry, and changed accelerater pump cams, to no avail.

this is an alcohol burning motor

Can someone offer some insight

[This message has been edited by chief4car (edited October 17, 2001).]

WILDphil
Dirt Full Roller

Total posts: 32
posted October 17, 2001 04:36 PM
Depends on 1) who built it? 2) what size carb is it and what size motor and etc. etc.?

I too have had this problem with a holley hp series but I truly beleive that my carb was too big (950cfm) for my application which was on a 355 motor with some porting being done.
So After about six races of this I changed to a Willy's carb and man that made a huge difference.The engine was alot crisper and alot smoother and the accerleration was unbeleiveable. But if your on a budget I think the Holley Hp series is a good carb to run with the right cfm it would have worked just fine.

chief4car
Dirt Full Roller

Total posts: 56
posted October 31, 2001 03:08 PM
I currently Have a 750 carb built by Bill Mitchell. The motor is a 406 running on alcohol. I dont think the carb is to big for the motor. The car is a 2900 lb Limited late model\Sportsman

I have heard alot about willy's carbs though,

Where can I get some more info,
Phone Number, Prices, Catalog, Web Site, Location Dealers Etc.

Thanks for the help

WILDphil
Dirt Full Roller

Total posts: 32
posted November 02, 2001 08:51 PM
Don't know about the phone # and stuff I bought mine though a motorstate dealer I can give the phone # of Motorstate dealer. It is 419-483-3275. The name of this place is York Fabrication, and when you call ask for Jerry, Give this Guy a call and I'm positive that he can help you out. Also when you call you will need to know your cam Specs. type of heads, and valve sizes, I think there are some other things too but I can't think of them right now. Also he is only open at night from like 5:30 on.

6pack
Dirt Maniac

Total posts: 128
posted November 05, 2001 03:30 PM
If your cam is not degreed properly(retarded),it could cause this.

spde
Dirt Maniac

Total posts: 139
posted November 05, 2001 09:02 PM
What kind of fuel regulater are you running? The barrel valve type or an adjustable ***** valve type? I know that the adjustable ***** type's have a jets to restrict the flow of the fuel back to the tank. Also how much fuel pressure are you running? At an idle I run no pressure, than at full throttle it jumps to 6psi. I run a mild 360 with alchol.

dirtracers
Dirt Full Roller

Total posts: 74
posted November 25, 2001 01:20 AM
like 6Packs answer only I think it is the timing my motor done the same we moved the timing up and it quit

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