TT lq4 or TT lq9

[Jdavis70]

Planning a ls swap into my 66 c10 Just not sure if I should use the lq4 or lq9 I'm going to run twin turbos and want to make around 800rwhp.

Any info about either motor would be helpful

[skeet]

i would think the lq4 wish dished pistons would be more suited for boost considering the compression is lower than what an lq9 would have!

then again wtf do i know lol im a nitrous high compression kinda guy

[kerrige]

800rwhp? I will tell you right now it doesn't really matter. You are going to want to pull the pistons and rods out anyways. In order to hit that safely you will need in the neighborhood of 400rwhp NA and 15lbs of boost. You will most likely want stronger pistons and rods. The stock crank is more than sufficient. If you run stock rods you will run the risk of bending a rod. If your goal was more along the lines of 600rwhp that would be a different story. Can you make 800rwhp on stock pistons and rods. Absolutely! You will want a very good tune and methanol injection.

[George C]

Planning a ls swap into my 66 c10 Just not sure if I should use the lq4 or lq9 I'm going to run twin turbos and want to make around 800rwhp.

Any info about either motor would be helpful

Depends on the year lq4

You want a strong rod to make 800rwhp. You can do it without going built

Ad for which motor that depends on fuel used..9.5 is good for pump gas
The 10.0 is good for e85 or c16

I've made 816rwhp on 11 psi with a 05 motor with twin 6265s on e85/meth

[George C]

800rwhp? I will tell you right now it doesn't really matter. You are going to want to pull the pistons and rods out anyways. In order to hit that safely you will need in the neighborhood of 400rwhp NA and 15lbs of boost. You will most likely want stronger pistons and rods. The stock crank is more than sufficient. If you run stock rods you will run the risk of bending a rod. If your goal was more along the lines of 600rwhp that would be a different story. Can you make 800rwhp on stock pistons and rods. Absolutely! You will want a very good tune and methanol injection.

do you speak from experience?

He doesn't need a built motor for 800rwhp

[Frenchy]

800rwhp? I will tell you right now it doesn't really matter. You are going to want to pull the pistons and rods out anyways. In order to hit that safely you will need in the neighborhood of 400rwhp NA and 15lbs of boost. You will most likely want stronger pistons and rods. The stock crank is more than sufficient. If you run stock rods you will run the risk of bending a rod. If your goal was more along the lines of 600rwhp that would be a different story. Can you make 800rwhp on stock pistons and rods. Absolutely! You will want a very good tune and methanol injection.

Parroting hearsay.

[RS/SS 4.8]

You don't need a 6.0 for 800hp, grab a 4.8 feed it 20lbs of boost all stock and bam 800hp lol. Back to your question if you can get a 05+ 6.0 LQ4, a cam and some good springs you will be good to go. A lot of motors been in the 800 range with stock internals lately its just easier with the bigger motors.