Anyone put stock 5.3 heads on LS1?
#1
Anyone put stock 5.3 heads on LS1?
If so What kinda increase did you see, with stock cam?
Also what head gaskets did you use? I was just wondering what a compression increase alone would do.
I think 5.3 heads would put my ls1 at around 10.8cr. With stock thickness gaskets. and 11.1 with .040 gaskets.
Also what head gaskets did you use? I was just wondering what a compression increase alone would do.
I think 5.3 heads would put my ls1 at around 10.8cr. With stock thickness gaskets. and 11.1 with .040 gaskets.
Last edited by vff_jeff; 01-04-2010 at 04:10 AM.
#6
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I made this mistake... don't do it! I have stock 5.3 heads on my LQ4 because I wanted a budget head to get my compression back up from the dished pistons in the LQ4. I had spare LS parts laying around so I came up with some stock LS1 valves and had the seats machined for the bigger LS1 valves. No port work was done on the heads, just had the valves put in. The car has some crazy bottom end and midrange with a G5X3 114lsa cam but you can tell that it's sucking through a straw. I'm confident with a set of ported 243's that it will pick my setup up at least another 40rwhp.
The car has run some good times at the track on the jug though. It ran 10.91@128 with this setup but on motor has only managed a 12.21@119.
The car has run some good times at the track on the jug though. It ran 10.91@128 with this setup but on motor has only managed a 12.21@119.
#7
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all you need is to open up the intake valve seat and use ls1 intake valves. with this you will pick up over a stock ls1 head. * unless you use a huge cam like this guy^^^. anything less than .580 mid 22X duration i feel they will give you better et in a 3400lb car
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#11
I was trying to do this just get junk yard 5.3 heads changed intake valves for ls1 valve and have them only ported with mls gasket with ms3 cam I just never got and answer if this would work or have ptv clearence on my ls1