lsxmalibu

iTrader: (50)

old combo was a 6.0, l92 heads ( ~9.5 to 1) truck intake and 02 zo6 cam...

new motor, aluminum 5.3 , 243 heads (~10.1), 02 Z06 cam....

everything else being the same, do you think 8 psi on the 5.3 will be close to 5psi on the 6.0 ?

Ryans99ls1

iTrader: (16)

i think itll make more power

NemeSS

iTrader: (127)

too many variables i think.
the l92 head 6.0 would prolly make more power imo

lsxmalibu

iTrader: (50)

Let's hear your opinions...

skinnies

iTrader: (33)

I like my aluminum 5.3, but I'd think the l92/6.0 would make more power.

lsxmalibu

iTrader: (50)

im sure the 6.0 was stronger, im wondering how much boost im going to have to put into the 5.3 to get around the same hp

skinnies

iTrader: (33)

If it was an lq4 before and an l33 now, I'd bet the l33 will take more power, the rods won't bend as quick.

91blowthru

what turbo are you using because i was wondering this also, as i will be using a tc-78 on a LQ4, and thought about using a LM7 5.3 in hopes to have a more effiecient setup concerning the f1 turbine wheel in the tc-78, im afraid that at 364 ci, the lq4 would become inefficient and exceed 2:1 backpressure.
im just wondering if the 19~c.i. would be worth it. i already have the LQ4 but could pick up a LM7 cheap and use my 317 heads...
let me know what you think.

lsxmalibu

iTrader: (50)

smaller turbo, 67mm

Badass94z

subscribing!!!

I Have been wondering this myself for a little while now, currently i have a LQ4 with 02 Z06 cam and 918's with a s375 76mm 1.15 AR see right at 18.5 pounds of boost in a foxbody mustang and have been 5.67 124mph and was wondering if the a smaller motor with a little more boost and being more efficient would run faster?

Hank Peabody

iTrader: (2)

That is moving for a cheap setup!! Good work!

charlie_gonzales

iTrader: (12)

Also interested in the results...thought about throwing a turbo on my 5.3 and pulling the magnuson blower off but didn't know if a 6.0 would be better

3pedals

iTrader: (3)

If you already have the magnuson, just spin it faster, and let that thing EAT

MillsMotorvation

Did the 6.0 break?

lsxmalibu

iTrader: (50)

hell no ,sold it to my brother, it was too nice of a motor to be beatn on. I got this l33 5.3 motor dirt cheap so im going to run that, Sold the ebay turbo and going to get a mpt70.

skinnies

iTrader: (33)

Go to a 76 or bigger.

lsxmalibu

iTrader: (50)

im limited to size, dont wanna redo all my piping, and hood clearance, the mpt70 will be a bolt on. Ill have to check the dimensions of the 76

skinnies

iTrader: (33)

Just do a TC78 then.