perplexing carb problem - Team Camaro Tech
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post #1 of 5 (permalink) Old May 22nd, 09, 05:54 PM Thread Starter
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perplexing carb problem

brand new AED 4150 carb
set floats and pump shot
initially I had a bog from standing start.
changed cams and shooters (BIGGER)
second road test:
stomped the throttle and spun tires through first into second.

next day
warm car up to temp as before.
step on gas and bog is back???????
took off pump arms and bent the arms a little.
readusted accel pump for .015 at WOT.
ok back to smoking tires!
next day same ol bog again?
this got me scratchin my head?????
maybe bigger accel pumps ????


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post #2 of 5 (permalink) Old May 22nd, 09, 07:44 PM
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Re: perplexing carb problem

Quote:
Originally Posted by dawg View Post
brand new AED 4150 carb
set floats and pump shot
initially I had a bog from standing start.
changed cams and shooters (BIGGER)
second road test:
stomped the throttle and spun tires through first into second.

next day
warm car up to temp as before.
step on gas and bog is back???????
took off pump arms and bent the arms a little.
readusted accel pump for .015 at WOT.
ok back to smoking tires!
next day same ol bog again?
this got me scratchin my head?????
maybe bigger accel pumps ????
dawg,
Ive been threw the same thing with my Pro-System 4150. It might be a little lean on the mixtures AFR screws. Also vacuum when take off with a 4-speed or an auto with a big cam will be tricky to get this bog out. I ran a vacuum gauge in the car to see what my vacuum would go down to when i release the clutch to help me dial the carb in better for this hesitation.

I NEED TO HIT THE LOTTERY
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post #3 of 5 (permalink) Old May 23rd, 09, 03:34 AM Thread Starter
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Re: perplexing carb problem

idle mixture screws are set at optimal plus an additional 1/4 turn out.
idle mixture was set at idle with trans in gear.


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post #4 of 5 (permalink) Old May 23rd, 09, 05:41 AM Thread Starter
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Re: perplexing carb problem

also pump pressure at 7 psi at idle and 6.5 at wide open throttle


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post #5 of 5 (permalink) Old May 24th, 09, 05:21 AM Thread Starter
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Re: perplexing carb problem

ok think I fixed it!
I had carb powder coated and powder coater coated entire carb inside and out?
looking at the metering block and comparing with a non powder coated block i see the holes are a bit smaller.
So I measured holes on non coated block and made the holes on the coated block the same.
reinstalled and readjusted pump shot and hasnt bogged all day!


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