BLACK-00-WS6

iTrader: (11)

Would there be any reason to run a 4.8 over a 5.3? Both are gen 3 with around 60k miles. Looking to get around 700 rwhp. For some strange reason I want to run the 4.8. Thanks

JoeNova

4.8 has a shorter stroke and a better rod/stroke ratio. Theoretically its the best setup for boost as far as crank and rod longevity goes. It might take longer to a pool the turbo, but its still just as capable.

A 4.8 crank in a 6.0 block comes back out to 5.3 liters, but with the added benefit of the shorter stroke and the ability to run ls3 heads.

SuperZ

iTrader: (2)

Awesome never thought of the shorter stroke

Forcefed86

iTrader: (4)

As far as JY builds go, I can think of a couple...

Cost- Not many want them, so they should be the cheapest option. Shoot for 2005 and up.

Converter- Because you can rev the 4.8 higher you can get away with a larger/cheaper converter. (less converter slip)

71 chevy

iTrader: (18)

agree with all points above.

also add that with some smaller turbos, the 4.8 can actually make more peak power.

Fast86z

iTrader: (1)

I would look at them in person and pick the cleanest looking one. I had this decision a couple weeks ago. Looked at 4.8 and it was caked in mud and grime. Ovbiously ran hard. 5.3 looked much cleaner so I snagged that one. JMO, the 5.3 has the advantage of more cubes. It's only 1/2 liter but with boost it allows room for much more air. I'm no expert on them though.