5.7 TEA HEADS
04-22-2003, 05:00 PM
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Re: 5.7 TEA HEADS I have heads, that have been milled .030, and my cam is at .579 lift.
But I have no comment as if your will be alright. Mine is solid roller by the way, with 228 duration.
But I have no comment as if your will be alright. Mine is solid roller by the way, with 228 duration.
04-22-2003, 10:24 PM
#5
Re: 5.7 TEA HEADS Guys,
It's not the lift that causes PV problems it's the duration and the ICL and ECL (LSA and advance) The valve is closest to the piston at the exhaust closing point and intake opening point. That's when the valve is only open a very tiny bit. Going with a cam like 230/230 on a 110LSA is going to run into trouble with P/V, now you can go that high like the LGX5 or whatever it is because the LSA is so high. If you ran a 224/224 .700/.700 on 114LSA you would have more P/V than a 236/236 .550/.550 on 110LSA.
Bret
It's not the lift that causes PV problems it's the duration and the ICL and ECL (LSA and advance) The valve is closest to the piston at the exhaust closing point and intake opening point. That's when the valve is only open a very tiny bit. Going with a cam like 230/230 on a 110LSA is going to run into trouble with P/V, now you can go that high like the LGX5 or whatever it is because the LSA is so high. If you ran a 224/224 .700/.700 on 114LSA you would have more P/V than a 236/236 .550/.550 on 110LSA.
Bret
04-23-2003, 12:32 AM
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5.7 TEA HEADS IS IT POSIIBLE TO TAKE A SET OF TEA 5.7 HEADS AND MILL THEM SLIGHTLY TO ACHIEVE HIGHER COMPRESSION FOR MORE POWER,OR IS THIS NOT POSSIBLE DUE TO PISTON/VALVE CLEARANCE?
04-23-2003, 12:44 AM
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Re: 5.7 TEA HEADS depends on what cam you are planning on running, and whether or not your bottom end is still at stock clearance specs.
there are a lot of guys posting about milling the 5.7 casting up around .030 to end up with 10.8:1 and up CR, and using cams with up to and over a .580 lift. In my opinion, I would clay the p2v clearance on anything above .560 lift.
there are a lot of guys posting about milling the 5.7 casting up around .030 to end up with 10.8:1 and up CR, and using cams with up to and over a .580 lift. In my opinion, I would clay the p2v clearance on anything above .560 lift.