engine guys, need more torque on 383 stroker - The 1947 - Present Chevrolet & GMC Truck Message Board Network

bigjimzlll · 08-02-2004, 07:55 AM

Ogier,
I wasn't trying to be a smart azz....I know all of the CFM formulas too. I always fall back on what GM did, and ofcourse personal experience. For a daily driver with a max rpm of 4500rpm, im sure the 600 would work OK, im also sure a properely tuned Qjet would be better. The Qjet is a little more than 600cfm. GM used 750s and 780 holleys with good sucess<sp>.

On the 455 im sure there was no hesitation or bogginess with a 600cfm carb, but there was a few HP left on the table.(IMO) Maybe im just out of touch(with pure street) tunning.

08-02-2004, 07:55 AM	#23
bigjimzlll Senior Member Join Date: Dec 2001 Location: Redding,CA...USA Posts: 4,736	Ogier, I wasn't trying to be a smart azz....I know all of the CFM formulas too. I always fall back on what GM did, and ofcourse personal experience. For a daily driver with a max rpm of 4500rpm, im sure the 600 would work OK, im also sure a properely tuned Qjet would be better. The Qjet is a little more than 600cfm. GM used 750s and 780 holleys with good sucess<sp>. On the 455 im sure there was no hesitation or bogginess with a 600cfm carb, but there was a few HP left on the table.(IMO) Maybe im just out of touch(with pure street) tunning. __________________ It's called "drag racing" if they called it "tic..tic..WHAM!..BANG! F*&K!!!", they'd have to keep the magazines under the counter with the other men's publications click the clicky to join the site.... http://67-72chevytrucks.com/vboard/payments.php 67 lwb..first hotrod in 25 years..540 best ET is 9.45 @ 141.44 Anderson,CA

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