after i peg it. - Team Camaro Tech
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post #1 of 4 (permalink) Old Apr 7th, 01, 06:40 AM Thread Starter
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Join Date: Feb 2001
Location: San jose Ca
Posts: 45

ive got the 625cfm demon carb and it is perfect in every way except for when i peg it fast. If i roll onto the throttle it takes off great but if i just peg it and keep it pegged itll like stumble and keep on stumbling unless i let off allitle bit. Its on a stock 327 w/rpm intake stock heads,cam,and full exhaust. think its my accelerator pump cam not giving it enough shot or to much? can it be something to do w/ a powervalve?
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post #2 of 4 (permalink) Old Apr 7th, 01, 06:49 PM
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Join Date: Dec 2000
Location: Monroe, WA, USA
Posts: 312

junmp up the squrter size, i belive it has a 28 or 31 in it, mine had a 31.

i would try one 2 or 3 #'s larger, also make sure your pump arm is adjusted right, no slack at idle. if it is not adjust it this can cause this too.

i have a road demon on my 350 i love it!!!!!

i also belive that the road demon is a 650CFM that is under rated to 625CFM...i am going from buterfly size and venturie size. this is just a guess but i belive i am right...

[This message has been edited by ilbl8 (edited 04-07-2001).]
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post #3 of 4 (permalink) Old Apr 10th, 01, 05:40 AM
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Join Date: Mar 2000
Location: Dtown PA
Posts: 820

road demons are nice, but there just educated holly's with a nice chrome finish.

a good friend of mine just purchased a 650H with the zinc finish, its got vacuume secondaries, but works well, I think the stock squirter is too low myself, I would plop a 31 in there myself, the stock 28 sux.


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post #4 of 4 (permalink) Old Apr 10th, 01, 12:08 PM
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Join Date: Dec 2000
Location: Monroe, WA, USA
Posts: 312

i beg to differ with you, a holley is not as responsive in my opinion. also the demon is a better built carb , i get this from taking mine apart and cleaning it before i put it on the motor. if you do this with a holley and a demon side by side you will notice the diferances very quickly.

i am not knocking holley carb's. i just well do not realy like the build on them. i feel the demon is a better built carb. all so the demon uses less fuel on a dyno then a holley, this has been proven oner and over again. this is because out of the box it is a more tweaked carb in the venturie area then a holley. it all so has a better airflow into the carb then a stock holley.

both work well, but i feel the demon take's less work to get more out of it.
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