LSXRX7

OK i searched and searched and came up with many differant answers. I am doing A 427 stroker on my ls6 i have LQ9 heads and ls6 heads which head would be better to use if i get them worked over by a shop? if they need to be at all?

or should i get different heads and how much do they cost$$$

thanx

NoGamesLS1

iTrader: (16)

I would think that the ls6 heads would flow better, but you'll be at high compression. I'm building an engine right now so this is where Ive been spending alot of my time http://www.diamondracing.net/cocalc.htm

Ferocity02

iTrader: (60)

Either head even if ported will still be restrictive on a big 427, IMO. I am planning on using GM LS7 or Warhawk LS7X heads on my 427.

Chris 96 WS6

iTrader: (1)

I thought the 6.0 Liter heads had LS6 ports, but bigger chambers. I guess I thought they would have flowed similarly when ported out.

11 Bravo

iTrader: (3)

The 6.0L's can get er done. These are my TEA's set up for 4.125.

lift intake exhaust
.100 70.2 59.3
.200 143.4 128.7
.300 216.8 188.7
.400 270.0 232.1
.500 311.9 257.2
.550 330.0 264.0
.600 343.8 268.0

Wish the chart had gone up to .650, would probably have seen 350cfm

Beast96Z

iTrader: (21)

That's a correct assumption. After porting, the heads flow almost identical. Most porters, espeacailly CNCers, run the same program wether it's 6.0 or LS6. I would let the compression needed be my determing factor.

LSXRX7

so to clear things up if they are going to CNC the final outcome will be the same if the LQ9 are milled. I have the LUNATI rotating assem for a LS6 so pistons are rev. dome.