LQ9 heads on an LS1
#1
LQ9 heads on an LS1
Can anyone tell me what the compression ratio would be for LQ9s on a 2001 LS1 block. I have an opportunity to obtain a good set, but I don't want to lower the original LS1 compression ratio. What could I do to bring the compression ratio back up to 10.25:1. Any info would be greatly appreciated.
Smoothzee
Smoothzee
#3
Thanks for the info! Does the intake side have to be milled to accommodate the intake? What do you base that number on? Not trying to be a jerk.......just need to know so that I can make an intelligent decision. Thanks!
#4
Originally Posted by smoothzee
Thanks for the info! Does the intake side have to be milled to accommodate the intake? What do you base that number on? Not trying to be a jerk.......just need to know so that I can make an intelligent decision. Thanks!
#5
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I will be putting LQ9 heads on my LS1 here in a few weeks. I cant remember the CR I will have but I will post it when I find my notes! I would buy them if the price is right because you can always sell them if you dont end up using them!
#6
Originally Posted by TigerFan187
I will be putting LQ9 heads on my LS1 here in a few weeks. I cant remember the CR I will have but I will post it when I find my notes! I would buy them if the price is right because you can always sell them if you dont end up using them!
There is a formula that I got off of one of these posts. After using the formula
I arrived at 9.7:1 compression ratio based on the 71.24 combustion chamber of the LQ9 heads. A mill of .030" will raise the compression ratio to 10:1, or at least that's what the "pros" tell me!