Recent LS3 head aftermarket head swap. Valvetrain a bit louder.
07-19-2024, 07:56 AM
#1
Recent LS3 head aftermarket head swap. Valvetrain a bit louder. Running a cammed, heads LS3 with Johnson 2116LSR lifters, .660 springs CHE trunions and recent Smeding Performance 11 degree cylinder Heads swapped.
I had existing GPI SS3 cam and Johnson 2116LSR lifters kept both during the swap to smeding heads. It seems the valvetrain has increased a bit since I got it back in 1500 miles.
I emailed Smeding performance and their response:I checked with my builder and he normally runs 8.325" pushrods in our builds with Johnson 2116LSR lifters, but with .051" head gaskets.Factoring in the difference in head gasket thickness, your pushrods at 8.310" should be the correct length.
You tube Valvetrain idle clip here:
https://youtu.be/lpVpzcCcVYg
Mods, please move to Gen4 engine.
I had existing GPI SS3 cam and Johnson 2116LSR lifters kept both during the swap to smeding heads. It seems the valvetrain has increased a bit since I got it back in 1500 miles.
I emailed Smeding performance and their response:I checked with my builder and he normally runs 8.325" pushrods in our builds with Johnson 2116LSR lifters, but with .051" head gaskets.Factoring in the difference in head gasket thickness, your pushrods at 8.310" should be the correct length.
You tube Valvetrain idle clip here:
https://youtu.be/lpVpzcCcVYg
Mods, please move to Gen4 engine.
Last edited by Rich2342; 07-19-2024 at 08:08 AM. Reason: Video upload. Please move to GEN 4 engine
07-19-2024, 09:16 AM
#2
TECH Senior Member
Why is this in Gen V?? LS3 is Gen IV