whats the differences between the 5.7 LS1 out of f-y bodys and the 6.0 out of the trucks??? i'm really only asking about the short block since i will be changin the intake which i know is different and the cam and heads which i'm guessing are different??? also are there different 6.0 engines like trucks compared to SUVs??? thanx for any info

I don't know all the ins and outs on this yet but I too am considering an LS1 type engine and here is what I have found. There are no bolt up issues or differences between the truck 6.0 and the car 5.7 aside from the oil pan needing to be matched to application. The truck 6.0 engines consist of two types. One has cast iron heads and the other has aluminum heads. The cast iron head mills are lousy and should be viewed as a short block throw away the heads... but the aluminum head versions have incredible performance pontential. From what I have read the head design is very simlar to the LS6 head found in the Z06 vettes. The hard part is finding one. They come in Denali yukons and Escalades for sure and there may be some that were used in pick ups but I have heard conflicting opinions on that. Regardless an aluminum head 6.0 is the one to find. I am sure there is more but thats what I have found thus far.

I THINK the truck 6.0 has an iron block. The only aluminum 6.0 is the LS2, I think!

Simply put the 5.7 LS1 out of a 2000+ Camaro/Firebird is the best choice when looking at an LSx Engine for a thirdgen

http://www.gm.com/automotive/gmpower...ehicle/lq9.htm

Correct on the Block being IRON other wise they are basically the LS2 block in Iron form. and If what I read about resleeving an LS block is like 2K then .... if you want a 6 liter (MPFI LS STYLE) it could be more worth while (to get the LQ4/9) but you would give up the aluminum block for IRON .... wouldn't be a bad swap, but you would have more custom work cause it came out of a truck, which now adays has no relation to a 3rdgen.

There was a great article in last months Hot Rod or Car Craft or? I read so many I can't find which one has it . Anyways they had a real specific breakdown of all the new gen engines from GM right down to the Northstar caddy motors about which one to use etc. and thats where I learned about the alum head 6.0 truck heads having amazing potential. If you search on camaroz28.com you will find some info on these heads as well. When it comes to making horsepower theres no replacement for displacement

I read that the iron block truck engines weigh only 65 pounds more than the equivalent aluminum block, fully dressed. I assume that is with the aluminum heads.

SLP has some 402 short blocks. They dropped a 4" stroke crank in a block. Add some good heads, a truck intake and you have one heck of an engine.

One recent mag, might have been Super Chevy, did a test on intakes. The truck intake, because it's taller, put out more power than any other (Weiand has a great looking polished aluminum intake, but at about $1,000, it's too expensive.)

This is weird because tonite I was flipping through the Sept. 04 Chevy High Performance (the one with Kandiedz's car in it) and on page 122 they have an article called "My Great 408". Here's a quick summary of the article. Early LS engine trucks were equipped with the LQ4 and LQ9 iron-block engine with a standard bore of 4.000 inches and stroke of 4.000 inches (382 ci). Bored to 4.030 in with the 4.000 stroke, you get 408 ci. The 6.0 liter block weighs 180 lbs, while the ls1 block weighs 87 lbs. All ls1 parts carry over except for windage tray and oil-can pickup. CHP then procedes to do a total cost $8500 buildup that gives max hp 592@6300 and torque 553@4700. Hope that helps!

Matt

The truck 6.0's have the same stroke as the 5.7 and 5.3, 3.622, the 6.0 is 364 Ci , adding the 4" crank and .030 over takes em to 408, they do not have a 4" stroke crank already or they would be over 400 ci stock.

Truck engines tend to go cheaper than F-body ones at the junkyard. A quick search on www.car-parts.com junkyard stuff shows 6.0L truck engines available. I like the truck wiring harness PCM location better also, wish I'd thought of that when I did my LS1 swap. The truck has it up front under the batt tray, nice location on a 3rd gen also.

Be aware that there are different variations of both the 5.7 and 6.0 GEN III engines, depending upon what model (F, Y body or truck) and what year it is. The '01 and later 6.0 engines all have Corvette style aluminum heads and the actual LS1 Corvette camshaft. I got one in my HD2500, and the 3 ton beast scoots pretty good. In essence, the 6.0 liter is mechanically just a larger displacement LS1 Corvette engine, but with an iron block and a different intake manifold. It's a great engine, if you can find one. The high output LQ9 6.0 engines (345 hp rated) are essentially the same as the regular LQ4 6.0 engines, except for slightly higher compression and full floating pistons. The power difference is mainly in the cal.

what is the code for that 6.0 truck engine the one with the alum heads and vette cam?

Why? I am trying to learn as much as I can about these engines, because I think I may try a carb'd one for my next swap. From what I have read so far, the truck engine would be better, maybe with some modifications. More cubes = more potential. Or is there some limiting factor in the 6.0 truck models?

The best thing about the aluminum head truck engine is although the cam may be the same as an LS1 the heads are suposedly very similar to the LS6 ZO6 Vette so the pontential is there for serious power with little more than a cam swap and good tuning. Especially when you consider the ZO6 is rated at 405 horse

All of the 6.0L Gen III engines are either RPO LQ4 or LQ9. Only the '01 and later LQ4's come equipped with the Vette parts, while all the LQ9's (which are much more scarce) come with the same good Vette style heads and cam.

I have only seen the aluminum head version in Escalades or Denali's do you know if they put them in regular trucks too?

Yes, my '01 HD2500 has 'em (LQ4). The Denali's and Escalades have the LQ9 engine, which all have the aluminum heads also. As I had previously said, all '01 and later LQ4's (available in "reqular" full size trucks) have the aluminum heads and the LS1 Vette cam also.

Sweet Thanks dude:lala:

Because he just spent 10K on his LS1 engine and has to justify it. You are right though, more cubes equals more power potential. The Iron block has more power potential than the LS1, why do you think the LS2 is 6.0L?? Just about everything is interchangeable from the LS1 to the 6.0L. Grab a 6.0L short block, some 5.3L aluminum heads (also from a truck), and a good camshaft and you could make some really good power....even moreso if you stroke it or bore it. Basically if you want a good bang for buck, the 6.0L short block would be the way to go. If you have an almost unlimited budget, get a LS6 block, and go for the 427 Lingenfelter kit.

my 03 Yukon with the 5.3 has aluminum heads.. ive put a cold air intake and a CJS full exhaust on it(would sound bad *** on an LS1 F-body too) and its fast.. i love the Kon now.. really woke it up. and yep its 2 wheel drive

I tried searching out the articles you mentioned here and I had no luck.
Any chance you could locate a link to those or give some more specific information?
I'm a noob to the whole LS1, LS6 etc. scene and still a bit confused about what's what and where it comes from, and it sounds like this article could be helpful.

Thanks

I have since looked all over and I still cannot find it. I am pretty certain it was Hot Rod May or June issue from this year or possibly Car Craft but there was also info on Ford and Mopar engines so it was not a Chev only mag. I only buy the ones that interest me so i can't nail it down by which months are missing as each month i get different ones. I have two brothers and many passerby's at the shop and this isn't the first time that i cannot find something i know I have If I run accross it i will update this thread. Wish I could be of more help.

Aha! I found it finally. April 2004 Hot Rod issue. Junkyard Jewels article. Streetiron85 you have a PM

ok so the weight of the alum 5.7 block is 87lbs and the 6.0 iron is somethin like 180. how much does the L98 weigh? i think i read in another post that the all alum LS1 actually raises the front of the car do to the less weight. also for all those intrested the newest issuse of chevy hi performance has a nice build up on both a 6.0 iron block and a 5.7 alum block. i aslo found out the the 6.0L in 2003+ trucks is also all alum

For some reason I didn't recieve that PM.
Thanks for locating the article for us tho.

I believe an empty bare SBC weighs like 150lbs....maybe I'm a bit off, don't know for sure. But yes, the weight, or lack thereof, of the LS1 will raise the car anywhere from 1/2" to 1" from what people have said. And yes, CHP did a 408cid iron block truck engine with aluminum heads I think, and made almost 600 streetable hp...I think it was like 594...I'll look it up later though. That's a very impressive N/A hp number from any engine that can still be driven daily.

I found a Junkyard Gems article, and some other interesting stuff, but nothing in there about genIII blocks.
Still no PM either.
Makes me wonder if maybe there are other PMs I'm missing too, because of some glitch.

You have another one