How much hp can a stock 6.0 handle? Was planning on building a 408 but came across a LQ4 for virtually free. Debating on slapping a LPE 2-3 cam on, port the heads, add a Magnacharger and calling it a day since the price is right on the motor.

 

Do it! As for power, I have no idea but I would think you would be ok...especially if the price is right!

 

It could take anything that maggie could throw at it, people have put 20+lbs of boost threw them without problems..
John

 

the stock shortblock could handle about 10-12psi with the right fueling and an awesome tune.

it can take all the magnacharger can give it and then a little.

 

I've heard of 6.0's living well at boost levels over 10psi. You probably won't get that much out of 112 maggie with bigger cam and fairly open exhaust. Porting the heads may be a waste of money unless you're using a blower with more capacity than the 112. I have an LQ4 going in a reg cab stepside in a few days. I'm hoping for 500hp at the wheels (+/- 600 fwhp). Ought to make for a pretty salty ride. It made 420 when it had a 5.3 under the maggie. Hoping that with better heads, 90mm throttle body, smaller pulley, and more cubes, we'll hit 500rwhp.

 

i've heard that generally a stock 6.0 block is good 'til about 550 rwhp.. whatever that would be to the flywheel i wouldn't have a clue..

 

Not a 6.0, the 6.0 is beefier internally. https://www.performancetrucks.net/fo...hlight=parish8

 

actually the block is good to well over 1000rwhp, proven several times

the crank is good to about 1000rwhp

the pistons and rods are only good to about 550-600rwhp. this is what needs replaced if going over 550rwhp

 

I have had mine to 16psi, and it is still running. Knock on wood.

 

Uh, you link to a thread about how hard Parish is pushing his 5.3L. I'm over 550hp and I don't think I've nearly maxed out the potential of my 5.3.

Rule of thumb is 10lb boost but I know of another engine running more and hanging together.

It really depends on what you want, a big bad 408 would be awesome too.