Valve spring installed height/pressure
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Joined: May 2023
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Valve spring installed height/pressure Hi
I have Ls1 short block, hand ported 799 heads with enginetech perfomance 2" and 1,571" valves (weight is same the as stock valves), TSP Torquer V4 cam, TSP PAC 660 dual spring kit. Going to spin engine 6800-7000 rpm.
What installed height/closed pressure should i shim the springs.
springs: install height 1.818
Closed pressure 160lb@1.810
Open pressure 415lb@.660lift
coil bind 1.015
Cam: 231/234@0.050
Valve lift 0.629 intake and 0.615 exhaust
Thanks.
I have Ls1 short block, hand ported 799 heads with enginetech perfomance 2" and 1,571" valves (weight is same the as stock valves), TSP Torquer V4 cam, TSP PAC 660 dual spring kit. Going to spin engine 6800-7000 rpm.
What installed height/closed pressure should i shim the springs.
springs: install height 1.818
Closed pressure 160lb@1.810
Open pressure 415lb@.660lift
coil bind 1.015
Cam: 231/234@0.050
Valve lift 0.629 intake and 0.615 exhaust
Thanks.
TECH Enthusiast
Joined: Feb 2018
Posts: 644
Likes: 300
From: Michigan
1.8" should be just fine. I ran a Torquer V2 with those same springs in my PRC 225s with a 2.065 intake valve that is heavier than stock and I didn't shim anything at all, I just used the 1 piece valve seal/locator. I spun that thing to 7000 rpm every single day for about 12k miles until my accident.
