383 stroker - which carb do i need?
#11
Senior Member
DYNO OPERATOR
Join Date: Mar 2008
Location: New Orleans,La
Posts: 515
Originally Posted by wrightway
Originally Posted by JEFF69Z28
I JUST HAPPEN TO HAVE ONE FOR SALE(750 AED)YOU CAN HAVE IT FOR 300.00 DOLLARS,IT CAME OFF MY 406.
Sorry that TV commercial for some office store just pop in my head :lol:
#13
Senior Member
MASTER BUILDER
Join Date: Mar 2008
Posts: 173
carb size
hey kwk you may be right and you may be wrong. he didnt giv e his rpm operating range, which i am guessing should be around 6500. if thats is the case and you use the standard cfm formula of rpms x cu. in. divided by 3456 then you come up with the cfm of 700 cfm. i would go with a 700 as first choice and 750 as second choice. the 650 cfm is really too small of a carb for this engine. being a 383 and a healthy cam it really could use the 750 cfm. just my opinion chevy art
#14
Senior Member
RACING JUNKIE
Join Date: Dec 2004
Location: austin texas
Posts: 729
10.25 compression, low flow heads, and he wants a it to clearly idle and not load up. A dyno would show that the engine would make no more power at 6500 than 5000.
Read his other post. 91 octane.
Save your carb money
650cfm
Read his other post. 91 octane.
Save your carb money
650cfm
#16
Senior Member
RACING JUNKIE
Join Date: Sep 2007
Posts: 4,137
Originally Posted by bowhay
the difference between 650 and 750 was night and day
That engine combo would be more fun to drive with the smaller carb
The only argument that makes sense for the 750(in my opinion) would be that you would have the bigger carb later on when you updated the engine with better heads...
go with the 750 i had a 830 bg on my 11.5.1 383 and went to the 750hp holley and the motor really liked it. my 1/4 times went from 11.33 to 11.12.
in a street car too small is way better than too large.
Just my opinion but I agree with kwkracing. Those heads are going to be finished at a relatively low rpm.
#18
Senior Member
RACING JUNKIE
Join Date: Dec 2004
Location: austin texas
Posts: 729
well as hard to believe as it may be i had a 650 vac secondary and a 670 vac secondary, and it woke up drastically when i put the 750 dp on it, all i had to do was put a lil bit smaller squirter in the front