My LS7 Valvetrain Info
#1
My LS7 Valvetrain Info
Well I finally got all of the parts of my valvetrain for my LS7 headed LS1 block. I decided to weigh each reciprocating part, except for the rockers, lifters, and pushrods, so I can get a good idea of what I'm working with. It's also for reference for anyone else with similar setups or plan. Here's the setup:
GM LS7 Heads...
GM LS7 Rocker Arms
Comp OE Replacement Lifters
GM LS7 Titanium Intake Valve: 76.7g
GM LS7 Intake Valve Lash Cap: 1.8g
GM LS7 Sodium Filled Exhaust Valve: 72.7g
PRC Dual Spring: 93.3g
PRC Titanium Retainer: 10.8g
GM LSx Valve Locks: 2.6g for pair, or 1.3g ea
Camshaft: 230/248, .628"/.630", XE-R/XE, 112+2 LSA, Comp Cams grind
Everything should work nicely together. The valvetrain overall is fairly light in my opinion. I'm definitely glad I went with the LS7 valves instead of stainless steel ones. I would have gone with lighter springs but I wanted a dual spring incase of a failure. Considering my cam lift and application, the PRC springs seemed like a reasonable choice.
We'll see how it holds up on the dyno in a few weeks!
GM LS7 Heads...
GM LS7 Rocker Arms
Comp OE Replacement Lifters
GM LS7 Titanium Intake Valve: 76.7g
GM LS7 Intake Valve Lash Cap: 1.8g
GM LS7 Sodium Filled Exhaust Valve: 72.7g
PRC Dual Spring: 93.3g
PRC Titanium Retainer: 10.8g
GM LSx Valve Locks: 2.6g for pair, or 1.3g ea
Camshaft: 230/248, .628"/.630", XE-R/XE, 112+2 LSA, Comp Cams grind
Everything should work nicely together. The valvetrain overall is fairly light in my opinion. I'm definitely glad I went with the LS7 valves instead of stainless steel ones. I would have gone with lighter springs but I wanted a dual spring incase of a failure. Considering my cam lift and application, the PRC springs seemed like a reasonable choice.
We'll see how it holds up on the dyno in a few weeks!
#5
Originally Posted by John B
That camshaft duration looks very nice for the LS7 application!