"Max lift" on stock heads?
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From: Fort Wayne, Indiana
"Max lift" on stock heads? I've done some searching and havn't really found anything, but I've got stock heads and a TR224 cam, duration is 224/244, 112LSA, and lift is .563/.563. I'm looking to get a set of 1.85 ratio roller rockers which will put my total lift at .613 at both valves. will this have clearance issues with stock heads and pistons or should I be alright?
The heads wont have a problem with .613" lift, thats everyday lift now. As long asa you dont have some wicked spring combination.
You have to check pitson to valve clearance no matter what ANYONE tells you. Because when your pistons and valves crash, its your own fault and you have to pay the bills to fix it.
You have to check pitson to valve clearance no matter what ANYONE tells you. Because when your pistons and valves crash, its your own fault and you have to pay the bills to fix it.
All of Thunder Racing's cams have the specific instructions: Due to the fast ramp rate of this cam the use of 1.8 rockers is not recommended.
But to answer your question, with the proper spring setup such as PRC or Patriot duals it is possible to run up to .650 lift.
But to answer your question, with the proper spring setup such as PRC or Patriot duals it is possible to run up to .650 lift.
Thread Starter
TECH Apprentice
iTrader: (24)
Joined: Dec 2008
Posts: 315
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From: Fort Wayne, Indiana
yeah i saw that too. so would the fast ramp rate mixed with rockers over 1.8 ratio just cause the valves to slam into their seats too hard? The car has PAC 1218 valve springs
Last edited by BlackBirds; May 20, 2009 at 11:36 PM.
The heads wont have a problem with .613" lift, thats everyday lift now. As long asa you dont have some wicked spring combination.
You have to check pitson to valve clearance no matter what ANYONE tells you. Because when your pistons and valves crash, its your own fault and you have to pay the bills to fix it.
You have to check pitson to valve clearance no matter what ANYONE tells you. Because when your pistons and valves crash, its your own fault and you have to pay the bills to fix it.
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Thread Starter
TECH Apprentice
iTrader: (24)
Joined: Dec 2008
Posts: 315
Likes: 1
From: Fort Wayne, Indiana
yeah, i know theres no substitute for a clearance test, I was just checking to see if I'd get a "no thats too much" response to just scrap the idea, which it doesnt seem like i'm getting
anyway though, with thunder racing's warning against 1.8 ratio rockers I'm not gonna go with them.
thanks for the info guys
anyway though, with thunder racing's warning against 1.8 ratio rockers I'm not gonna go with them.
thanks for the info guys
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