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Which 6.0 is best for a junkyard turbo build?

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Old 07-23-2008, 03:41 PM
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Default Which 6.0 is best for a junkyard turbo build?

Ok, some quick background, I have a 68 firebird that has/had a 600 hp pump gas 455. Long story short, tossed a rod and looking to build a turbo'd lsx to replace it.
I'm thinking 6.0 for the extra cubes. Basically I'd like to see at least what I had power wise to the wheels, but some extra would be even better. 700ish on meth injection with pump gas would be the ultimate goal.
I know it'll be a ticking time bomb at that level but the car is an occasional cruiser and I'm not worried about getting 50k miles out of it.
So, to the original question, is any 6.0 longblock more desireable than any other or is a truck motor a truck motor?
Old 07-23-2008, 03:44 PM
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The LQ4 with it's dished pistons should be a little better for your setup. Like you said though, it's only a matter of time either way.
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Old 07-23-2008, 03:48 PM
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And what did the LQ4 come in?
Sorry, ls1 noob here. A while back I had a nice list of all the LSX's and what they came in but I can't for the life of me find it now...
Old 07-23-2008, 03:51 PM
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silverado hd2500's i believe.
Old 07-23-2008, 03:54 PM
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Go with an LQ4.

Originally Posted by less10
silverado hd2500's i believe.
Correct, the earlier Denalis and C3s also had them.
Old 07-23-2008, 03:55 PM
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Stay away from the pre 2002 models!!!!!!!!!!!!!!!!
Old 07-23-2008, 04:01 PM
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Originally Posted by less10
silverado hd2500's i believe.
hd2500's were also diesel,
the lq4's were available in 6.0 2500 silverado and gmc trucks
and there price is around 1000-1600 for a longblock,
ive disassembled 100k+ mile longblocks and the crosshatch is visible and the motors are still healthy,
Old 07-23-2008, 04:06 PM
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So 02+ LQ4 is the way to go it sounds then?

Should I get into turbo system parts selection here too or start another thread?
New here and getting the feel for how things work around these parts
Old 07-23-2008, 04:19 PM
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Originally Posted by bottledbird68
Should I get into turbo system parts selection here too or start another thread?
Search and read the stickies.
Old 07-23-2008, 04:25 PM
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Searched and been reading but haven't found exactly the answers I'm looking for. I'll dig a little deeper though before I post a new thread
Old 07-23-2008, 05:41 PM
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check over in the truck section...there are alot of us running lq4's and boost
Old 07-23-2008, 05:52 PM
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Originally Posted by bottledbird68
Ok, some quick background, I have a 68 firebird that has/had a 600 hp pump gas 455. Long story short, tossed a rod and looking to build a turbo'd lsx to replace it.
I'm thinking 6.0 for the extra cubes. Basically I'd like to see at least what I had power wise to the wheels, but some extra would be even better. 700ish on meth injection with pump gas would be the ultimate goal.
I know it'll be a ticking time bomb at that level but the car is an occasional cruiser and I'm not worried about getting 50k miles out of it.
So, to the original question, is any 6.0 longblock more desireable than any other or is a truck motor a truck motor?
You talking 600-700rwhp or flywheel? Big diff especially if automatic.
Old 07-23-2008, 05:58 PM
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Originally Posted by ninetres
Stay away from the pre 2002 models!!!!!!!!!!!!!!!!
why is this????
Old 07-23-2008, 07:06 PM
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Originally Posted by JBrady
You talking 600-700rwhp or flywheel? Big diff especially if automatic.
Old motor was 600 flywheel. Looking for 600 or better rwhp now from this setup. And I'll most likely go T-56 at the same time
Old 07-23-2008, 07:16 PM
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Originally Posted by camarokid94
why is this????
The cranks are ~1" longer and cause allllllllllll kinds of drama......ask me how I know
Old 07-23-2008, 07:16 PM
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Originally Posted by bud8fan
check over in the truck section...there are alot of us running lq4's and boost
Ok, am I blind or is the truck section somewhere else? Excuse the noob please lol.
And thank you
Old 07-23-2008, 07:20 PM
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Originally Posted by bottledbird68
Ok, am I blind or is the truck section somewhere else? Excuse the noob please lol.
And thank you
Look at the very tippy top of the screen right now......above the ls1tech banner. Click performance trucks. Your LS1 tech name/password work there too
Old 07-23-2008, 08:25 PM
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Originally Posted by ninetres
The cranks are ~1" longer and cause allllllllllll kinds of drama......ask me how I know
around .400+ for the crank flange iirc
Old 07-23-2008, 11:08 PM
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For a big hp build stick with the Lq9, better rods and such, ask me how I know.
Old 07-24-2008, 08:48 AM
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700rwhp in your car is no problem.I would atleast upgrade the rod/piston combo. There are people around you that run similar setups and I know 1 local guy that does them.


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