Quote:
Originally Posted by grivera
with a Performer intake
|
Even more interesting is why Comp decided to use anemic Xtreme Marine lobes 3355 / 3356 for the Olds XR290HR
The Pontiac / Chevy versions - XR288HR have 157 duration @ .200 lobe lift.
The Olds only gets 146 @ .200.
With 10.9 compression, stock E-heads about 278 CFM and that cam, only 500 HP for a 455 Olds.