5.3 liter heads
5.3 liter heads I heard from someone that the 5.3 liter heads actually flow better than my 5.7 liter ones. I have a friend that has some and said he would trade me for my 5.7s. I have a lunatti voodoo cam in my car and have heard that those heads actually help the cam. is this true. the heads are supposed to flow better and up my compression. thanks
They flow substantially less than 5.7's. Port them, put some larger valves in, and you'll be golden. The increased compression should help with that cam and stock displacement.
Yup, the advantage to the 5.3 heads is the increased compression. Follow the above advice on porting and revalving, and you'll have a monster set of heads... probably pretty cheap.
I think if you check, 5.3 valves are smaller, as are the intake and exhaust runners.
As far as which is better, that depends on your goals. For me, I'm not a top-end track junkie. I just play on the street. So I prefer my power lower in the rev range, and am willing to sacrifice some of the top end potential. But if you're wanting the top-end all out track times, I'd go with the LS6 heads. You can run a bigger cam with them unless you get way whacky with them.
As far as which is better, that depends on your goals. For me, I'm not a top-end track junkie. I just play on the street. So I prefer my power lower in the rev range, and am willing to sacrifice some of the top end potential. But if you're wanting the top-end all out track times, I'd go with the LS6 heads. You can run a bigger cam with them unless you get way whacky with them.
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Originally Posted by orangeapeel
5.3's are gonna be a higher velocity head. That is where you are getting more power from.
i did porting to my stock 5.3's and then ran out of cash for bigger valves. DONT DO THAT. Just do whatever it takes to put bigger valves in them, and you will have a good set of heads, for cheap.
