6.2 rocker arms

Reply Subscribe

Thread Tools

Search this Thread

04-14-2009, 12:20 PM

#21

CI DENALI

TECH Apprentice

Join Date: Dec 2008

Location: CAYMAN ISLANDS

Posts: 308

Likes: 0

Received 0 Likes on 0 Posts

Quote:

Originally Posted by Just Enough

Comp posted a dyno chart of their currently biggest #403 L92 VVT cam, and it held peak HP for 1200 rpms from 5800 to 6500 dead flat, hp not torque. I have never seen hp flat up there for that long, I think that is what the value of VVT is. I just need to get my little cam in this week and feel this first hand.

I saw that. Looks like the dyno test on my Shafiroff 565 in my race car - it peaks (more like plateaus) at just over 1000HP over a 1000RPM spread too, but I'm thinking that's more of a product of the motor reaching the flow limit of the carb. It may be that the long runner truck intake becomes a limiting factor at the high end with the bigger cams in the L92, because there's not much difference in power between the #402 and the #403 cams, from the tests that GM High Tech did.
But, imagine what we might see one of these days when we have race motors with VVT, where you can really expore the benefit of retarding cam timing at high RPMs.
Let us know how the install goes.