6.0 Heads Vs 5.3 Heads
Re: 6.0 Heads Vs 5.3 Heads Well
5.3's have a smaller chamber, 6.0L have a better set of ports. I would do the 5.3L from TEA or if I wanted to go all out, 6.0L's milled down alot and ported for another 30-40cfm more than the 5.3's
Bret
5.3's have a smaller chamber, 6.0L have a better set of ports. I would do the 5.3L from TEA or if I wanted to go all out, 6.0L's milled down alot and ported for another 30-40cfm more than the 5.3's
Bret
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Re: 6.0 Heads Vs 5.3 Heads you can use a bigger cam with the 5.3's and not have to worry about P/V clearance like you do if you mill a lot off of the 6.0's.
It's easy to get 11:1 compression from the 5.3's with slight milling, where the 6.0's would take quite a bit. 6.0's would be better for FI applications or strokers.
Correct me if I am wrong guys... <img border="0" title="" alt="[Smile]" src="gr_stretch.gif" />
It's easy to get 11:1 compression from the 5.3's with slight milling, where the 6.0's would take quite a bit. 6.0's would be better for FI applications or strokers.
Correct me if I am wrong guys... <img border="0" title="" alt="[Smile]" src="gr_stretch.gif" />
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Re: 6.0 Heads Vs 5.3 Heads 5.3 heads will rtequire chamber work to flow any where near 5.7 or 6.0. Chamber work if done by hand is critical because different size chambers will cause missfires and incorrect o2 readings. Fully ported 6.0 will not flow 30 to 40 more cfm than ported 5.3 heads either. Just trying to be helpful.
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Re: 6.0 Heads Vs 5.3 Heads Thanks Shawn, it looks like I'm gonna go with those 6.0 heads. I was just trying to make sure I'm making the right choice. What kind of compression do you think would go good with these?
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Re: 6.0 Heads Vs 5.3 Heads Be careful as to how large of valves you try and put in the 5.3 heads. I recently was witness to some 2.02 valves that were machined into a stock seat and the seats are actually cracked and began breaking apart in the head. This was also the case on the exhaust valve, but I cant remember the size. The seats need to be changed if larger diameter valves are to be installed in the 5.3 heads. Ask whoever you buy your heads from about this, if they dont know or dodge the question, CAREFUL!!!
Re: 6.0 Heads Vs 5.3 Heads Yeah 2.02 valves need a new seat in the 5.3L heads.
LS1derfull I have only seen 300cfm numbers out of 5.3L heads and 340cfm numbers out of 6.0L heads. So if you have seen 5.3L heads that flow more tell me about them, because I might want a set.
If you have the extra cash for the 6.0L cores then get those puppies milled down and have them ported. That's a more expensive way to go but it will work.
Bret
LS1derfull I have only seen 300cfm numbers out of 5.3L heads and 340cfm numbers out of 6.0L heads. So if you have seen 5.3L heads that flow more tell me about them, because I might want a set.
If you have the extra cash for the 6.0L cores then get those puppies milled down and have them ported. That's a more expensive way to go but it will work.
Bret
