ok so a friend of mine bought my 03 lq4 monday and I went and bought an 06 lq9 out of a wrecked 2006 vortec max truck with very low miles I am going to be putting it in friday night any of you lq9 people know about how much I should pick up if any ?

 

45 hp and 20 lb/ft of torque in stock form...about .6-.7 point of compression (10.08:1 LQ9 vs. 9.4:1 LQ4 scr)

 

wish i could find a 6.0 good luck with your swap, i also wondered what the difference would be

 

the difference between the lq4 and lq9 is negligible...personally I'm a bit baffled why you're doing the swap, seems pointless. Was something wrong with your lq4? The lq4 is rated at 335 and the lq9 is 345. 10hp due to the increase in CR. It will work a little better with your cam though.

 

Id just mill the heads on the 6L thats in the truck. Get the CR up to what the LQ9 is and you got the same thing minus alot of money..

 

Have to agree. It isn't worth the time for the power you will gain.. Sell the 9 to your buddy then have more to do mods.. :nods:

 

317 head CC is 72 right?
a 243 head CC is 66? im tryin to look up the info..

 

Found that.

 

317 is 71.15cc
243 is 64.45cc

243s flow a teeny weeny bit more up top...bout 5 cfm

 

Huh, the info I found on the net said the LQ4 was 300 horse...I thought that sounded low actually. Maybe that was an earlier LQ4 spec or something....