L82gofast

iTrader: (1)

Yep!

6.0 modified

I just bought a 2002 6.0L out of a wrecked 2500, I hopeing it is a LQ9 motor, they already had it removed from the truck, so how do I find out it is a LQ9? anway, I am having the block bored and made into 408 C.I. so I don't think it will matter if it is a LQ4 or an LQ9, The blocks are the same, the diff in HP, they are getting out of the tunning and the way the heads are set up

marc_w

I don't think it's a LQ9 if it came out of that truck... I think the only way to tell would be to check the glove-box codes.

But yeah, if you're putting in a new rotating assembly, it won't make any difference.

moregrip

iTrader: (8)

2500 = LQ4. Not much difference between LQ4 and LQ9.

my 6.0 is rated 300hp, 360 ftlbs. there's speculation that the truck LQ4 is ether detuned or underrated.

greentahoe

iTrader: (2)

The LQ9 has more compression. It has different pistons.

F8L Z71

Exactly. The intake is the same as are the heads. It's a compression and most likely something in the PCM that makes for the extra power.

I didn't want to get a 6.0L when I bought my truck because I believed the specs form GM and it seems like a waste. I was wrong. With the same mods on a 6.0L as I have on my 5.3L I would have been solid into the 13s N/A. My buddies truck weighs 500lbs more than mine and he smokes me on a daily basis with similar mods. I just can't compete with the extra cubes.

moregrip

iTrader: (8)

6.0 HP ratings

325 @ 5000 rpm
GMC Sierra Denali
320 @ 5000 rpm
GMC Yukon Denali/Yukon XL/XL Denali & Suburban
315 @ 5000 rpm
H2 (prelim)
300 @ 4400 rpm
Chevy Express, GMC Savana, 3500 series, 2500 HD & 3500 GMC Sierra and Chevy Silverado pickup and crewcab

6.0 TQ ratings

370 @ 4000 rpm
GMC Sierra Denali
365 @ 4000 rpm
GMC Yukon Denali/Yukon XL Denali
360 @ 4000 rpm
GMC Yukon XL/Suburban, Chevy Express & GMC Savana 3500 series
H2 Prelim
2500 HD & 3500 GMC Sierra & Chevy Silverado pickup and crewcab

vVandals909

So how much hp and torque will a tune add? Also is the tune one of those programmer things? What other mods will make the motor come alive. Also this is going to be in a 3/4 ton truck. So i dont need fast just more power.

vVandals909

Anyone?

fastinspirit02

iTrader: (1)

I'd look at www.nelsonperformance.com
I'm not positive but I think they're seeing from 35-50 extra hp with the tune on a 6.0, depending on how aggressive it is. Its a whole new pcm (computer) and he'll send you a tuned one and you pop it in then send your stock one back to him