400 sbc head intake flow [Archive] - Chevelle Tech

: 400 sbc head intake flow


soccerguy045
Feb 22nd, 04, 5:14 PM
What intake runner sizes are just right for a 406/408ish sbc? Are 220 too big as a general rule? Is there an equation to test this? I know about the CFM equation for carbs but not head flow. Thanks.

Motor Martyr
Feb 22nd, 04, 5:25 PM
Taylor,
It all depends.
The factors you need to consider are numerous. A short list would be:
RPM range
Weight of the car
Gearing
Tranmission
Converter