06-26-2021, 02:49 PM
|
 |
CC Member
|
|
|
Join Date: May 2008
Location: Brisbane,
QLD
Cobra Make, Engine:
Posts: 2,797
|
|
Not Ranked
Quote:
Originally Posted by zzmac
I was just on the Holley website and their simple calculator recommends a 750cfm double pumper. For street driving and the occasional spirited driving do you think the 650cfm is more than enough for this engine (Roush 402R) or is the 750cfm a better choice? Thx!
|
Depending on how hard you drive, a 650 is good for 5500 rpm for your 402 cubes.
A 750 is good for 6500. Both at 100%. Both figures would need to be lowered for volumetric efficiency. Typically 85-90% for a good street engine.
FYI, I run a Holley 850 DP annular on my 434.
__________________
Gary
Gold Certified Holden Technician
Last edited by Gaz64; 06-27-2021 at 04:47 PM..
|
11Likes
Threaded Mode
