sowaidi

iTrader: (5)

my brother want to buy an 08. most of them are 4.8 its hard to find a 5.3. i know the 4.8 compression is less than the 5.3. but is it better for boost? 10 psi, meth.

Noah Burns

iTrader: (5)

there are HUNDREDS of 5.3L trucks in the DFW area...

old motorhead

iTrader: (10)

It's plain and simple. If you're after mpg, go with the smaller cid. If you're after max hp, go with the bigger motor. More cid = easier HP.

sowaidi

iTrader: (5)

all we could find is CC and EC, hes lookin for a RCSB.

95 bright teal

It required some searching for mine.
i would try to get a 5.3, mod for mod you will be better off.
If you plan on upgrading to a 6.0 or better than get a 4.8

Stoichiometric

iTrader: (10)

My 4.8 ran pretty good on 12 lbs. I would pick a nicer 4.8 RCSB than holding out for one with a 5.3 in rougher shape.

Wilde Racing

iTrader: (26)

4.8 does not have dished pistons. they are stronger.

kbracing96

iTrader: (26)

And they are the same comp as the 5.3 (9.4 to 1). With a small cam and 11 psi of boost or so, you can get 500rwhp out of them

They really are a good boost motor. Biggest down fall is the lack of torque when not in boost because they are a shorter stroke motor.

trever1t

iTrader: (14)

not all 5.3's have dished pistons

Wilde Racing

iTrader: (26)

That is true, If you could, a L33 pile would be they way to go, other than 6.0.