Re: ls turbo build
 

I have a low mileage 4.8 I'll gladly trade for a 6.0 as well:lol:

Re: ls turbo build
 

The reason why the Lq4 is boost friendly is the lower compression ratio to the LQ9.

Re: ls turbo build
 

LY6 is similar...at 9.65:1 vs 9.4:1 for LQ4...tho it also has the genIV rectangular port heads and VVT.

Re: ls turbo build
 

here is a pic of my ls1 motor with a turbo. Stock bottom end with a speed inc tu1 cam double spring kit and 60# injectors. I hope to be around 600hp with 6-9#'s of boost. running the stock 4l60e for now

Re: ls turbo build
 

can you tell me what size turbo you are running? Also, with the fuel injection did you have to have the accelerator pedal from the donor vehichle? Which engine is it? thanks

Re: ls turbo build
 

it is a 70mm turbo and no I'm using the stock gas pedal in the truck

Re: ls turbo build
 

motor looks sweet with that car intake and painted that color with the GMPP valve covers.

Re: ls turbo build
 

the motor is out of a 2001 camaro

Re: ls turbo build
 

I hope you plan to take it easy with the stock 4l60e.

You don't need a special pedal if you use a cable driven TB. You only need the gas pedal if you plan to run a drive by wire, along with the tac module and computer(from the same vehicle)

Re: ls turbo build
 

not to metion, 5.3s are going for $500. say they cant sell them because people arnt breaking them. friend of mine just bought one and bought twin turbo setup from ebay for $1200. keep in mind i know those turbos are cheep knock offs, but his money not mine.

Re: ls turbo build
 

haha those ebay turbos are actually intriguing. Some of the older ones actually had epoxy holding them together, but seems it was only a certain run. Most of them now are just knock offs of proven designs, usually with slightly poorer materials or tolerances. That being said, over on the turboforums, people are going FAST on them. Junkyard motors + ebay turbo running 11's all day ain't bad. Let us know how his setup works.

Re: ls turbo build
 

600 hp = short life for a stock 4L60E. I am curious if the #60's will be maxing out if you are close to 600 rwhp. Are those manifolds off a Vette, G8 or? Very nice build.

Re: ls turbo build
 

Here we go, just sold the big block and trans. 1st thing is that i'm going to have everything under the hood painted the ketchme kopper by house of kolor to match the truck, then i'm going to rewire everything with a new painless wiring kit.... I also found a ls motor out of a chevy truck complete with harness and everything for $450. I'll give him a call tomorrow to find out how many miles are on the engine and everything. Then i'll send it to an engine builder to change the rod bolts, head studs, cam and gaskets. I'll start posting pictures, you guys wish me luck!!!

Re: ls turbo build
 

The ls motor that i was looking at already sold. So i'm still looking. What year did the lq4 ls motor come out of? Or is the lq4 mean it's a 5.3? I bought a used procharger intercooler good for 1100+hp and a procharger blow off valve. Both cost me $600... And for the trans, i was planning on building a 4l80e, but the cost was going to be over $3000 complete with converter to handle over 1000hp. So i decided to go back to the old reliable turbo 400 with reverse pattern and a transbrake... Here's a couple of pictures of the bov and intercooler...

Re: ls turbo build
 

Lq4 have dished pistons good for boost they came in 99-06 hd trucks and the 07up are ly6 this is similar to wat I'm wanting to do to my 69 I have a 5.3 there I'm not using that I might throw in my truck. Good luck with ur build keep us updated
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Re: ls turbo build
 

LQ4 is the "low" compression 6.0. LQ9 is the high comp 6.0. LM7 and later the LY5 is the 5.3.

http://en.wikipedia.org/wiki/GM_Vortec_engine

Re: ls turbo build
 

The 5.3 is.... a 323 in terms of CI if I'm correct but called a 325/327, the 5.7 is 347 and the 6.0 is 364 CI the 6.0 having the 4.00in bore is nice because they have really nice stock heads like the l92 head swap. As far as lq4/9s are only 6.0s and the lq9 if I'm correct has slightly thicker connecting rods and obviously pistons as well check my sig for the ls primer link it tells everything and one last thing I think the gen IV engines started in... 06? Using different rectangular port heads instead of cathedral which means not interchangeable and vvt and few other things making those heads cost possible a little more along with cam although vvt can be eliminated although some of this is already mentioned, TSP 427 6.0 stroker kit would be nice also :-p
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Re: ls turbo build
 

Just picked up a 5.3 out of a 2003 tahoe complete minus alternator and ps pump and starter.... Tore it down today, and ready for the machine shop... might change heads, but not sure yet, they are the 706 heads... I gave $450for this engine with computer and all harnesses... Also picked up my built turbo 400 a couple days ago.... Radiator and hydraboost will be here monday!!!!!!!!!!!!!!!

Re: ls turbo build
 

one more...

Re: ls turbo build
 

very cool!

Re: ls turbo build
 

That looks good.

Re: ls turbo build
 

just got the new radiator in... it's by entropy!!!!!!!!!!!!!!!!!!!!!!!!!!!!:metal:

Re: ls turbo build
 

awesome!....that looks like sweet rad.

Re: ls turbo build
 

When you do the hydoboost setup can you go in a lil more detail on setup an what parts. Wanting to do for my 84, thanx an lookin forward to rest your build
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Re: ls turbo build
 

will do.... i'm getting it tomorrow, i'll take pictures of it also.... I plan on ordering new brake line just to run from the mastercylinder to the 1st place they connect just to make it look alot better than what i have.... i think summit racing has a role of tubing with a bender for $80....