Go5.3tt06

iTrader: (1)

Hey. I want to share with everyone. I am wondering how it work and any difference compare ls6 (243 cylinder heads) and LS3 cylinder heads. Do you think if use LS3 cylinder head on the LS6 block would make some good power?

codysgto

Ls3 heads will not work on a ls6 block. The block needs to have a 4" bore.

Always2Slow

iTrader: (8)

Untrue. Unmodified ls3 heads will not work on a ls6 block, but modified heads for the ls6 block will work. Long story short it's more cost effective to put the money into 243 heads.

Go5.3tt06

iTrader: (1)

Oh ok, you mean ls3 heads would be more cheaper and make more power than 243? Where can I find modified ls3 heads from store online? Im still research for that.

allan808

iTrader: (3)

Sell the ls6 shortblock and get a 6.0 block! then run stock ls3 heads on it! problem solved! cheaper and makes more power!

Go5.3tt06

iTrader: (1)

I cant, I already bought a brand new ls6 block. don't want to sell lose money.

redtan

iTrader: (5)

Get some nice AI or TEA porter 243s and go with those. Even modified LS3 heads with smaller valves would not be as ideal as the 243 stock valves on the smaller 3.898 bore.

Go5.3tt06

iTrader: (1)

How much cost for Ai and TEA. Do I need heads to ship to them. Which I dont have one. What about Texas speed PRC stage 2.5 5.3 heads?

redtan

iTrader: (5)

They both cost around 1000 bux just for the porting, plus the heads.

Or you can just buy some TSP LS6 heads for some $1500 which in the end is the same price.

The 5.3s are good heads, especially to increase compression, but ultimately come up short of a well ported 243.

Go5.3tt06

iTrader: (1)

which would u suggest for me to get 5.3 heads or 243. Remmy Im going run n/a but will nitrous to use under 150 shot

masterz28

iTrader: (8)

Judging from the shot decision, 5.3 heads just for your circumstances.

intenseblue

iTrader: (1)

Youre going turbo so id swing for 243s