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Author Topic:   Alky Carb help
BB46
Dirt Roller

Total posts: 6
posted September 04, 2001 04:21 PM
Just got to the track for last 2 races. Getting way too much fuel into engine. Haven't gotten the Water Temp above 120 yet. Runs way to rich but,, when we try to lean it out it hesitates BAD when you throttle up. When richen it up to get rid of that its way to fat. Any ideas on air bleeds, fuel pressure, Carb size, jet size, or any other ideas. Got some help from dirtracer14 and understand it a little better. Have one race left. Hope to have it run better for last one. I know,,, not alot to go on here but,,, I can't type all day. Lets see, 350 chev. Roller cam, 12-1 comp, Dart heads, Suposidly a 950 Alky carb, on a little bigger that 3/10 dirt track. Not high bank.
Thanks, BB46

dirttrackracer
Dirt Full Roller

Total posts: 26
posted September 04, 2001 06:12 PM
I had same problem,carb. manufacturer had me go up one size on squirters at a time until it stopped hesitation(change all squirters).It worked, but I had to go to a thermostat(195 degrees) to get temp up.Make sure you use a good thermostat or you will have problems there too.

bogged
Dirt Roller

Total posts: 25
posted September 04, 2001 06:34 PM
you may want to check the powere valves. if there is not enough engine vacuum to operate the valves correctly you can experience the effects you have discribed.

Pickel
Dirt Freak

Total posts: 239
posted September 04, 2001 09:14 PM UIN: 25419780
do you run a fuel regulator ... I know with Alky you have to have a regulator or it will flood and make it run rich..You only need about 6 pounds of pressure..

[This message has been edited by Pickel (edited September 04, 2001).]

CUSTOMPERFORMANCE
Dirt Freak

Total posts: 213
posted September 04, 2001 10:59 PM
i had problems with mine also. after talking with dayton of kinetic performance and asking questions, which he answered i sent mine off to him. very nice work and good turn around time

BB46
Dirt Roller

Total posts: 6
posted September 05, 2001 12:02 AM
Have been running Power Valve blockers. Did try some 35 valves. Figuring that with BIG cam we wouldn't have alot of vacume. That is the right way to go isn't it? WE had 65's in other carb. I have heard theory about bigger squirters. Sounds logical to me. Have about 7 to 8 lbs pressure. Fuel log with return and a Kinser type of regulator that Mr. dirtracer14 gave me some ideas with at the track. Nobody thinks air bleeds are any problem huh? We have thought that also. I'm all new with alky and learning the hard way. Keep the good ideas coming.
Thanks BB46

dirttrackracer
Dirt Full Roller

Total posts: 26
posted September 05, 2001 05:09 PM
I would put power valves back in, I dont think very many block them off unless drag racing.Make sure that you jet up ,I think they say 10-15 jet sizes,not sure though.Also make sure that you get alky power valves.

BB46
Dirt Roller

Total posts: 6
posted September 05, 2001 11:10 PM
All sounds good and logical. We took the blocker out of the front and put in a 45 power valve. blocker still in back. Drilled out squirters and it seems best so far. Not great yet though. Still seems a bit fat on the front 1/2. Will it get better when it warms up? Might play a bit more tomorrow with it. Think you all got me on the right track. Still listening though so don't be bashfull.
Thanks.
BB46

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