better flow- 5.3L or 5.7l?
Thread Starter
TECH Enthusiast
Joined: Dec 2004
Posts: 627
Likes: 4
From: Miami, FL
better flow- 5.3L or 5.7l? Do 5.3L heads fitted with 5.7L sized valves flow better than stock 5.7L LS1 heads?
Do either head have an advantage once 2.02/1.57 valves are fitted?
Other than smaller combustion chambers for higher compression, is there any characteristic of a 5.3L which would be superior to a 5.7L?
This is for street NA use with camshaft lifts below .581".
Do either head have an advantage once 2.02/1.57 valves are fitted?
Other than smaller combustion chambers for higher compression, is there any characteristic of a 5.3L which would be superior to a 5.7L?
This is for street NA use with camshaft lifts below .581".
Thread Starter
TECH Enthusiast
Joined: Dec 2004
Posts: 627
Likes: 4
From: Miami, FL
I can obtain stock(unported) LS6 heads for about $1000. Would these be a better alternative to a lightly worked 5.7L or 5.3L(with larger valves)?
Considering a GT2-3 or similar stealth camshaft.
Considering a GT2-3 or similar stealth camshaft.
!LS1 11 Second Club
Joined: Apr 2003
Posts: 7,133
Likes: 2
From: Miami
^ Ah, I was talking about 241 castings, not 243's.
For $1000, check out Texas Speed, Patriot and Livernois for their CNC ported 243 casting LS6 heads, assembled. They're as cheap as $850.
To answer your question, either the ported ls6 heads or a good 5.3 would make a good match to that cam.
For $1000, check out Texas Speed, Patriot and Livernois for their CNC ported 243 casting LS6 heads, assembled. They're as cheap as $850.
To answer your question, either the ported ls6 heads or a good 5.3 would make a good match to that cam.
Thread Starter
TECH Enthusiast
Joined: Dec 2004
Posts: 627
Likes: 4
From: Miami, FL
Initially so was I. But thought to add in the other 5.7L alternative after viewing pricing options.
Search function has been rather restricted the past few days. Cannot access older posts.
Search function has been rather restricted the past few days. Cannot access older posts.
