i dont feel like taking the motor out of the truck after its in so im gonna throw some pistons and rods in there while its out. im thinking of going with a 5.3L because of the price difference, with a set of 6.0L heads to drop the compression some.-

go with a nice valve train and some HPtuner software

 

a forged 5.7 iron block would be nice

bore out the 5.3 to take shelf LS1 pistons and forged rotating assembly

 

with the combo you previously stated.. with traction and a good driver mid to low 10's... but.. I would use a bigger turbo.. thats just me.. I wouldn't waste my mone on anything under a 66 mm

 

i think he already has the 60 trim

 

I ran a 60-1 on my 4.3 v6 mind you its a forged 8:1 motor with ported heads and 202/160 valves.. but I maxed out my 60-1 at 4200 rpm with a v6.... with 10 psi and meth.

I buy the turbo for the engine not build the engine for the turbo from now on.. I learned my lesson. Just personal experience.

 

im stock 4.3L

- what kinda power can you get out of a fully built forged, MPFI 4.3L? revolutionary??????? 600whp?


hmmm so just get a LS1 crank, and the just use ls1 forged rods/pistons and i got a 5.7L???? sounds good to me

 

Fully built 4.3 if it was done by the right people.. I would guess close to 600 flywheel horsepower. With about 12 psi of boost.

The sy ty guys are making huge numbers but.. they have to crank the crap out of those turbos to make power because even with all the work they do to their engines they don't flow as well as the newer gen engines.

I will find out how fast you can go with a stock crank here pretty soon with a 66 mm turbo on my xcab pickup. I am thinking it should do low 12's and then I am going to spray it with a 100 shot and shoot for mid to low 11's

That has a forged set of pistons good H beam rods.. billet splayed caps stock steel crank and stock size valves with some really nice port work and stainless ferra valves and a custom grind turbo cam.

My other engine in the blazer should be enough to push the blazer into the low 11's with a 67mm turbo but I am not pushing that truck anymore.. its just too much fun the way it is.. I have other stuff to go way fast I don't want to break my blazer its too nice.

I will however push the x cab till it spits parts then I will throw a nice stock lq9 in it with a procharger.

 

if you get a 4.8/5.3L block and bore the block over( not sure how much) drop in ls1 pistons and you've got a 5.7L 5.3L and 5.7L cranks are the same if i was doing that though id put in forged pistons and crank and rods too

 

This is just a start I am doing a set of Stainless steel stepped primary turbo headers for a 4.3 customer of mine. 1 5/8 primary to a 1 3/4 step. 2 1/2 crossover pipe to a T-4 flange. He is going to run a 62-1 turbonetics hoping to make somewhere around 550 rwhp on a built forged engine.

This is a front mount setup however.