LQ4 or L33
 

Lower comp with larger displacement, or higher comp/better heads and lighter weight. Which would you go with?

Both around the same price. On a budget

Car is 3700 lbs with 4.11's 3500 stall. Driving around for a year or two with only a cam/intake swap and future plans for boost.

LMK your thoughts

Re: LQ4 or L33
 

depends on HP goal. The cast iron block is nice, but moves around just as much as the aluminum version. You can make a nice 408 CI out of the cast iron block and put hard block up to the bottom of the water pump holes and its a great base for 1000whp turbo setup. The smaller displacement aluminum blocks do well also, just make sure the engine machine work is done with the mains and both torque plates bolted on, and hard block as well.

Give MAP a call, they are working more and more with turbo LS stuff.

Re: LQ4 or L33
 

Or get an lq9 they got the good 6.0 block and rotating assemblies but have way better flowing heads than the lq4. I'm pretty sure they were in escalades and such

Re: LQ4 or L33
 

No block fill or machine work. Guys are getting redonk power out of both with stock internals


The only difference between a LQ4 and a LQ9 is the pistons. Everything else is the same including block and heads

Re: LQ4 or L33
 

I say get the one with better heads. More flow more power.

Re: LQ4 or L33
 

Yeah, I haven't heard of filling the block at street power levels. Get the 6.0 block, put the factory aluminum heads slightly ported, done.

I found out my 07 Tahoe came factory with pretty much the C5 Z06 heads. If it didn't weigh 5000+ pounds, it would be pretty quick.

Re: LQ4 or L33
 

I have a LQ4 in my Denali XL and it is really strong, even stock with 325hp. 5,600lb curb weight and 1/4 mile in the very low 15's. Pretty impressive.

Re: LQ4 or L33
 

Lq4 there bullet proof.

Re: LQ4 or L33
 

Ended up finding a minty 16K mile L33 for a good price so I'm going to pick it up this week.

Like the idea of 100 less lbs hanging over the front.

Re: LQ4 or L33
 

Nice choice! They are getting cheap enough that we are going to see them stuffed in more and more things.

Re: LQ4 or L33
 

Less weight out front = easier wheelies! :D

Re: LQ4 or L33
 

I reckon Imma have to start a build thread

Re: LQ4 or L33
 

Damn straight!