| FAQ |
| Members List |
| Social Groups |
| Calendar |
| Search |
| Today's Posts |
|
#1
06-15-2026, 01:33 PM
|
|||
|
|||
Rpm vs stock intake
A couple of differences were asked in another thread. I did this a while ago just for s&g.
Rpm is 1" higher at rear carb mounting holes Rpm is 1 3/16" higher at front holes. Rpm carb pad slopes towards the front 3*. Stock carb pad slopes towards the front 6*. Rpm carb mounts 5/8" rearward from stock. Stock plenum depths are 3 1/2" and 1 7/8" Rpm plenum depths are 4 3/8" and 2 3/8". Rpm plenum depth difference is 3/8" more than stock. I did not measure ports sizes.
__________________
Frank M. 75 Firebird 68 Firebird 400 RAIII 66 Chevy II 461 Pontiac in AZ |
| The Following User Says Thank You to tooski For This Useful Post: | ||
|
|
The PY Online Forums is the largest online gathering of Pontiac enthusiasts anywhere in the world. Founded in 1991, it was also the first online forum for people to gather and talk about their Pontiacs. Since then, it has become the mecca of Pontiac technical data and knowledge that no other place can surpass.
Threaded Mode