Ls2 GTO 500/453
Drove it about 2 weeks, popped 2 valve springs and bent a valve. The valves were trashed, 2 cracked rocker arms, was told it was due to the high lift on the s2 and springs weren't rated for high enough.
So after a refresh on the heads, new Harland Sharp rockers, Btr Stage 4 cam, and some magic by Mike at G-Force in Pearland I got the attached dyno sheet.
I'm on vacation but can't wait to come home and pick her up. I expected to lose some power but to lose 1hp and gain 15lb/ft if torque surprised me.
Nothing but praises on the job they did.
Last edited by houston_four; Aug 2, 2017 at 07:54 AM. Reason: Hyperlink
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