I kind of doubt you will ever get to 1:1, and if you did, the turbo would take forever to spool anyway. Anything below 2:1 on these engines is really good. Most kits are in the 2.5-3:1 range.

 

I'm being hopeful, but probably not realistic. I agree with your mindset. I'm going to cross my fingers and hope lol. If I can't get it where i want it, so be it. It'll still do wicked burnouts and break parts all day haha.

 

That's what i was thinking. The box units (which i assume is what you had) usually have pretty large turbines and housings.

I'm a little on the fence with mine. I've got the 87mm turbine, T4 1.25 a/r. The T4 is really making me feel better about the turbo size. It will not be as fun as a s372 or a precision 66mm, but it should be ok.

I put twin s256's on a buddie's corvette a couple years ago. His ls2 spins up those 64mm turbines no problem, so I'm hoping mine will be alright.

 

Those headers look great! Good job.

Can't wait to see videos of this thing

 

Here are my goals:

1) Drive around truck with turbo on 7 psi and do burnouts. Hit the dyno. What will actually happen is that i turn it up to 15 psi and grenade my 4l60.

2) put on 4l80, turn up to 15psi. hit the dyno, go to track, see what it does and also do burnouts

3) build 5.3L on the side and put in truck. Crank up till i hit 1000 whp, go to track, run a 10.99 and also do burnouts.

 

Thanks!

 

i always like reading up on these turbo builds people do. nice to see all the fab work as well.

 

With the amount of burnouts you plan on doing I think you need to add buy tires to that list

 

indeed sir. its a dirty game....

 

the manifolds look SICK! great job man