Help with compression on Corvette LS1 heads on a 5.3
Thread Starter
TECH Apprentice
Joined: Aug 2003
Posts: 368
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From: Newport News, Va
Help with compression on Corvette LS1 heads on a 5.3 I got a good set of LS1 corvette heads for my truck. My friend is going to port and polish them.
The only thing I am worried about is compression. I want to have about 9.5-10.0-1. Which Head gasket should i use?
Should I mill the heads .030 ?
What do you guys think?
The only thing I am worried about is compression. I want to have about 9.5-10.0-1. Which Head gasket should i use?
Should I mill the heads .030 ?
What do you guys think?
Thread Starter
TECH Apprentice
Joined: Aug 2003
Posts: 368
Likes: 0
From: Newport News, Va
Not sure which head gasket I should use. ???
Far as the milling will this effect a high lift cam if I decide to put one in eventually ?
If I dont mill the head what compression do u think ill be looking at with a thin head gasket ?
Far as the milling will this effect a high lift cam if I decide to put one in eventually ?
If I dont mill the head what compression do u think ill be looking at with a thin head gasket ?
Originally Posted by tooquick2beslo
Not sure which head gasket I should use. ???
Far as the milling will this effect a high lift cam if I decide to put one in eventually ?
If I dont mill the head what compression do u think ill be looking at with a thin head gasket ?
Far as the milling will this effect a high lift cam if I decide to put one in eventually ?
If I dont mill the head what compression do u think ill be looking at with a thin head gasket ?
Donno about the P/V with a high lift cam. My 5.3l truck has a .559" lift cam and 112ºlsa has absolutely no problems with P/V clearance. Of course your intake valves are larger and would therefore reduce P/V clearance. Afraid your gonna have to check this one before you run it to be safe.
Richard
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Thread Starter
TECH Apprentice
Joined: Aug 2003
Posts: 368
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From: Newport News, Va
Originally Posted by Richard@WCCH
I think you'd want to run the 5.7l head gasket. The stock 5.3l gasket bore's too small and would probably develop leaks from the fireseal around the chamber.
Donno about the P/V with a high lift cam. My 5.3l truck has a .559" lift cam and 112ºlsa has absolutely no problems with P/V clearance. Of course your intake valves are larger and would therefore reduce P/V clearance. Afraid your gonna have to check this one before you run it to be safe.
Richard
Donno about the P/V with a high lift cam. My 5.3l truck has a .559" lift cam and 112ºlsa has absolutely no problems with P/V clearance. Of course your intake valves are larger and would therefore reduce P/V clearance. Afraid your gonna have to check this one before you run it to be safe.
Richard
So the heads should bolt on just fine right ? The 5.7 head gasket should work ? Im not worrying about the clearance as of yet because i dont have a cam but i will be looking at it in the future. I just hope the computer is ok with this change over.
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