cfm for my 454? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

ortega · 10-15-2009, 02:23 AM

i want to get another carb for my truck but i dont know what to go with? its a 454 with an edelbrock intake and hedman headers. everything else is stock, but i would like to add a cam a little bit later on. what cfm would be good for this engine?
thanks

BLOWN73 · 10-15-2009, 02:26 AM

if your going to pump it up a little down the road i would do with a holley street advenger 770 and jet it down that way you have room to grow.

ortega · 10-15-2009, 02:36 AM

not to much, just a cam.

CreditGod · 10-15-2009, 03:07 AM

I agree if its a daily driver get an electric choke as an add on for those cold mornings

if not a daily driver get the full double pumper version

either way you will have plenty of room to grow

DubDubU · 10-15-2009, 06:57 PM

carb shop around here uses this formula for max cfm

(cid/2)x(max rpm/1728)= max cfm

ortega · 10-16-2009, 09:34 PM

Quote:

Originally Posted by DubDubU

carb shop around here uses this formula for max cfm

(cid/2)x(max rpm/1728)= max cfm

how do i know whats my max rpm

3r!c84 · 10-16-2009, 10:29 PM

take a guess.probly like 4000-5000

DubDubU · 10-17-2009, 03:50 PM

Quote:

Originally Posted by ortega

how do i know whats my max rpm

If you were to install a new cam, it will say on the cam card. A stock 454 will probably be about 4500. Not sure since I've never had a stock 454.

powerdriver 1958 · 10-16-2009, 10:44 PM

Holley has a calculator that i use for a cfm guide,look in the upper right side of the page.

http://www.holley.com/TechService/

10-15-2009, 02:23 AM	#1
ortega Registered User Join Date: Aug 2007 Location: sun valley Posts: 98	cfm for my 454? i want to get another carb for my truck but i dont know what to go with? its a 454 with an edelbrock intake and hedman headers. everything else is stock, but i would like to add a cam a little bit later on. what cfm would be good for this engine? thanks

10-15-2009, 02:26 AM	#2
BLOWN73 Registered User Join Date: Jul 2009 Location: visalia, ca Posts: 110	Re: cfm for my 454? if your going to pump it up a little down the road i would do with a holley street advenger 770 and jet it down that way you have room to grow.

10-15-2009, 02:36 AM	#3
ortega Registered User Join Date: Aug 2007 Location: sun valley Posts: 98	Re: cfm for my 454? not to much, just a cam.

10-15-2009, 03:07 AM	#4
CreditGod Registered User Join Date: Dec 2008 Location: dallas, texas Posts: 90	Re: cfm for my 454? I agree if its a daily driver get an electric choke as an add on for those cold mornings if not a daily driver get the full double pumper version either way you will have plenty of room to grow

10-15-2009, 06:57 PM	#5
DubDubU Registered User Join Date: Mar 2007 Location: st louis,mo Posts: 313	Re: cfm for my 454? carb shop around here uses this formula for max cfm (cid/2)x(max rpm/1728)= max cfm __________________ '79' shortbed

10-16-2009, 10:29 PM	#7
3r!c84 Badass Join Date: Jan 2009 Location: lox. fl Posts: 4,586	Re: cfm for my 454? take a guess.probly like 4000-5000 __________________ Think outside the box? -84c10 (1stcar)→My Build← -00 Saturn 5spd drop a gear and disappear! 1/4:13:90

10-16-2009, 10:44 PM	#9
powerdriver 1958 Kid's Mechanic Join Date: Nov 2006 Location: Kansas City Posts: 8,241	Re: cfm for my 454? Holley has a calculator that i use for a cfm guide,look in the upper right side of the page. http://www.holley.com/TechService/



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