I am having a new engine built for my mustang.
It's one of the std. 347 stroker engines with afr 185 heads and a moderate cam (cam not selected until we flow the heads).
At any rate, I was going to use my 289 performer intake from edelbrock and my 500 cfm card from edelbrock.
I considered going to a holley 750 dbl-pumper, but when I went to the Holley site and did the math I'd be lucky to need a 600 cfm carb.
Their formula for carb selection is
Engine size (CID) x maximum RPM / 3456 = CFM
CFM @ 100% volumetric efficiency
And they note most cars are 80% efficiency up to 89% on highly modified cars.
Well 347 * 6000 / 3456 = 602
at even 90% efficiency thats only 541
Based on that my 500 cfm carb will limit me some, but a 750 seems way overkill.
What is you guys experience?
It's one of the std. 347 stroker engines with afr 185 heads and a moderate cam (cam not selected until we flow the heads).
At any rate, I was going to use my 289 performer intake from edelbrock and my 500 cfm card from edelbrock.
I considered going to a holley 750 dbl-pumper, but when I went to the Holley site and did the math I'd be lucky to need a 600 cfm carb.
Their formula for carb selection is
Engine size (CID) x maximum RPM / 3456 = CFM
CFM @ 100% volumetric efficiency
And they note most cars are 80% efficiency up to 89% on highly modified cars.
Well 347 * 6000 / 3456 = 602
at even 90% efficiency thats only 541
Based on that my 500 cfm carb will limit me some, but a 750 seems way overkill.
What is you guys experience?