How much do you guys think I will lose by going back to stock heads? Over my 5.3's?

 

Well, you might pick up 1 or 2psi maybe.....its a toss up.....your going back to stock compression down from 11:1 though right?

 

Yep, from 11:1 to to stock.
I just don't know if I want to spend more money on 6.0L heads.

I know lowering the CR will help. But how much can I lose from not having ported heads? And larger valves?

 

Did you get your $$s back from Jay. I remember your posts on the ASSolute thread, where you said that you wish you had paid by credit card. That guy is a jack ***!!!

 

Nope, never got my money back. I have people looking for him. And a LEO helping out.

 

Anyone?

 

You probably won't lose much.

Someone was running around 800 RW with stock heads and stock cam because they didn't pick anything up with ported heads and a turbo cam.

You might go up a few PSI though.

 

Doesn't sound like I should waste another couple grand on new heads. Just go back to stock.

 

Why don't you just have the combustion chambers of the 5.3's modified?

 

I already have those heads sold.

 

Whats the chamber size on the stock 6.0s? How about Valve sizes?

 

I would be going back to stock LS1 heads.

 

71.03cc CHAMBERS and i believe 2.0 and 1.56 valves.....
Kyle

 

http://www.smokemup.com/tech/ls1.php

 

you can Lower compresion by Going with thicker MLS COmetic Gaskets. It might help ya a Little?

 

If you go stock, why not get a set of 6.0 heads for the 70cc chambers, do a cleanup hone on them, and maybe a valve job. Not a bad idea to go with bigger valves on the exhaust side.

 

Oh I wanted to add that 6.0 heads I believe have smaller intake and exhaust valves than stock LS1 heads.

 

By Tims link above, the LS1, LS6 and 6.0s all have the same valve sizes. The 5.3s have the smaller valves.

I may do the same. Sell me stage 2 5.3s and get a set of stock 6.0s with a valvejob and maybe bigger valves.

 

what you lose in cfm you can pic up in power from the added timing and less detonation with the lower cr. boost will obviously go up because of the lack of resistance in the motor, but you shouldnt so much get a power increase from that boost.

If you are forcing the air in it shouldn't matter. Don't get thick gaskets, keep your quench tight. put in some head studs and cc the chambers to get them the same.

 

Sounds like a viable option that shouldn't cost too much.
But I also thought that the 6.0L has smaller valves. :dunno: