Whats the difference between lq4 and lq9 short blocks????
09-27-2009, 08:20 PM
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Whats the difference between lq4 and lq9 short blocks???? I wanna put a iron block in my car but not to sure what the differences are between the lq4 and lq9 if any??? I thought that the heads were different but whats different about the short blocks??? Thanks!!!
09-27-2009, 11:34 PM
#2
LQ4 has dished piston with compression ratio of 9.4:1 and LQ9 has flat top piston with compression ratio of 10:1. LQ9 is supposed to have better rods and pistons. They both should have the same 317 casting number heads which are just a larger combustion chambered version of the LS6 heads. Bare blocks are the same.
09-27-2009, 11:48 PM
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Ok really i just wanted to make sure the blocks were the same... And i planned on running the 317 head with a good forged rotater with boost so i wanted to make sure on the blocks!! I found a 60k lq4 block only for $150 so i didnt wanna buy it without knowing... Thanks!!
09-28-2009, 04:35 AM
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LQ4 has dished piston with compression ratio of 9.4:1 and LQ9 has flat top piston with compression ratio of 10:1. LQ9 is supposed to have better rods and pistons. They both should have the same 317 casting number heads which are just a larger combustion chambered version of the LS6 heads. Bare blocks are the same.
