LS7 bolt ons?
Launching!
Joined: Dec 2014
Posts: 215
Likes: 1
You are talking about being good/bad from a making power perspective. They are great at that. Done several ls7 cars with nothing but new guides/valves that have made 580-590rwhp. I do agree that port work is not a good way to spend money. I'm talking about them from a reliability stand point. I've seen over 40 sets pulled. Only 1 wasn't completely worn with almost all the valves shot and guides 3-4x the service limit. I've seen exhaust valves with radial cracks forming. I've seen 2 ls7s drop valves right in front of me. I know countless others that have popped because the head issue wasn't addressed. So yes, fix the junk heads from a reliability stand point then they will make power just fine.
It should be the first thing any ls7 person does, that or an extended warranty unless you have $12-15k laying around to replace it when it pops.
It should be the first thing any ls7 person does, that or an extended warranty unless you have $12-15k laying around to replace it when it pops.
I don't want to get into a "big dick swinging contest" but simply to say, it was my responsibility as the former head of V8 Supertourers, and a mechanical engineer of many years, to diagnose all reliability issues with the whole race car including the engine's. I can only repeat what I have previously stated, we saw very little valve guide issues, no dropped valves to date, and these are real race cars being hammered around the track for hundreds of miles weekend after weekend.
