difference between LS6 style heads and 5.3 heads
11-23-2006, 02:55 PM
#1
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difference between LS6 style heads and 5.3 heads what is the difference between all the popular ls6 style heads and the popular 5.3 heads..why would I want one over the other for a N/A car??
Is it the compression bump with the 5.3's people like??
Happy T DAY!
Erik
Is it the compression bump with the 5.3's people like??
Happy T DAY!
Erik
11-24-2006, 06:24 AM
#2
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Untill last year, the 5.3 was the budget option for ported heads. LS6 heads were $1200
for cores. With the arrival of the LS2, and their 243 (LS6) castings, that threw the market upside down since you could now have LS6 castings for around $450
In stock form the 243 is much better flowing. In mild ported form they are pretty much similar. A 5.3 achieves that with smaller intake runners (~220cc ported) and have a tad more velocity. It all depends on the stage of porting.
for cores. With the arrival of the LS2, and their 243 (LS6) castings, that threw the market upside down since you could now have LS6 castings for around $450
In stock form the 243 is much better flowing. In mild ported form they are pretty much similar. A 5.3 achieves that with smaller intake runners (~220cc ported) and have a tad more velocity. It all depends on the stage of porting.
11-24-2006, 09:44 AM
#3
Originally Posted by PREDATOR-Z
Untill last year, the 5.3 was the budget option for ported heads. LS6 heads were $1200
for cores. With the arrival of the LS2, and their 243 (LS6) castings, that threw the market upside down since you could now have LS6 castings for around $450
In stock form the 243 is much better flowing. In mild ported form they are pretty much similar. A 5.3 achieves that with smaller intake runners (~220cc ported) and have a tad more velocity. It all depends on the stage of porting.
for cores. With the arrival of the LS2, and their 243 (LS6) castings, that threw the market upside down since you could now have LS6 castings for around $450
In stock form the 243 is much better flowing. In mild ported form they are pretty much similar. A 5.3 achieves that with smaller intake runners (~220cc ported) and have a tad more velocity. It all depends on the stage of porting.
11-24-2006, 09:50 AM
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PredatorZ I am looking for a set of ls6 heads were can you get the bare castings for 450? Also what are welded chambers? I see were you can get 035 castings with welded chambers. Is that like a 6.0 head with the chambers welded? Thanks for your help.
11-24-2006, 10:54 AM
#6
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Originally Posted by Patrick B
PredatorZ I am looking for a set of ls6 heads were can you get the bare castings for 450? Also what are welded chambers? I see were you can get 035 castings with welded chambers. Is that like a 6.0 head with the chambers welded? Thanks for your help.
The LS6 "style" you are talking about are 6.0 heads with welded chambers to bring the cc down. Stock 035 are 72cc. By welding the chambers, they can custom make your desired chamber size. They are called LS6 "style" because they have the same runners as LS6 heads, kinda like a LS6 head with a big chamber.
11-24-2006, 03:43 PM
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Originally Posted by N4cer
Remember: 5.3L heads offer less PTV clearance.
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11-24-2006, 10:57 PM
#9
Ask the guys at a shop. They could tell you exactly. I just know that there's other reasons for the PTV clearance to be different, not just the cc of the combustion chamber. It really doesn't matter, since you'll have the heads off. Take 20min and flycut and run whatever you want.
