06murder

thanks a million and one budhayes

TrickyTransAm

For what it's worth...

It's what I have in my LQ9, and I've got 300hp at the rear wheels tuned.
Count on getting a larger intake, throttle body, injectors, headers, new crossover, air intake, cats, and exhaust plus a tune to get it anywhere near right.
It's OK... I went with 114lsa for more street manners and a more sporty sound, but it's still kinda nasty as a daily driver. With a Flowmaster super 40, it sounds like a jetthro's 70 chevy 350 with cherrybombs. (Not exactly what I was hoping for)
The engine will want to breathe, and it won't be able to do that if all the rest is stock equip.
Anybody that tells you that it's an easy direct swap is false.

Oh... and count on premium fuel.

01 5.3

iTrader: (10)

Rwhp sounds kinda low to have a 224 in it. I was thinking a stock 6.0 put down more power than that. Why would you need a new intake the truck intake works fine with just a 224.

TrickyTransAm

I thought so too.. I just had it dyno'd. The tuner had difficulties getting it to perform with the current stock hardware.
The 5.3L manifold is "Good" up to the 6.0L, but apparently when you add a cam and more compression, the engine can't breathe through a straw.

The stock LQ9 puts out 345HP at the Flywheel.
Remember...your going through a transmission, transfer case (So at least 25% loss) and 265 tires. SO 300hp at the wheels puts the engine at around 380hp+ at the flywheel. But, based on the data coming from the wideband, and the MAF it was restricted.
Power after about 4700 RPM falls off quickly due to detonation because of 89 octane fuel. Better fuel would help, but still...

Believe me...I don't have tons of cash to spend - I'm just trying to save someone else the trouble of getting half way into the project, and finding out what I did.

01 5.3

iTrader: (10)

Do you have headers and other stuff with the motor. If so you should be up close to 380 rwhp. Maybe some higher octane fuel and a good tune will help it out.

TrickyTransAm

No, right now Stock exhaust manifolds, stock crossover with stock 5.3L cats.
5.3L Intake and stock 75mm cable throttle body. Stock MAF, and Air Cleaner assembly and resonator. K&N filter soon to be pulled out and replaced with factory air cleaner element.
34lb/hr injectors are happy at 72% duty cycle
So, I tried to keep it as close to a "Direct Swap" as possible to see what gains would be found.

Here's what it sounds like, in the event you wanted to know.

http://www.youtube.com/watch?v=SnLmwkQkRPg

jrmchevyman

ah that is why you were so low "300rwhp" with your 6.0L. Let your engine breathe some more get some long tube headers and at least mod the stock air box and I bet you will even feel the difference. The stock manifolds are robbing quite a bit of your power potential.

TrickyTransAm

I agree.
Not to hijack the OP thread, but this is what you will have by doing a direct swap 6.0L with the 224R cam, so keep that in mind. Being you already have headers...you should be good to go.

01 5.3

iTrader: (10)

I see. Was just wondering why so low with what you have. I thought you probably had headers and other stuff. So the cam is seeing no benefit without the supporting mods.

TrickyTransAm

Exactly. The components have to work together.
It's not an "All you gotta do"