All of the turbos you mention are way too big for your application IMO. ESPECIALLY the choices for twins... a single GT4288 is too big IMO for your average 6.0L. A GT35r with the small housing (.81 A/R) would be a decent single imo but will likely lag a lot on the 4.8 (it is, as I recall, a race BB turbo with a 650ish hp cap) -- I'm not up on the BW sizing scheme, but I'm pretty sure a S400-72 is a T6 housing (read HUUUUUGE) and is a 1000hp capable thumper. The holset is designed for a 10-15l diesel IIRC.

 

Well in your experience what is a 900HP budget?

And what is a 400HP budget?

For a 6.0L that would be done up with all the goodies the right way

 

Looks good. That's what I was wanting to see. That Denali is out of hand. LOL! Looks like a lot of work there, is it running yet?

 

May I ask why you are sticking with the 4.8? Not an insulting question but just would like to know why. BTW cool Cummins swap.

 

A 900 HP (GOAL) has a limited budget You dont build a dependable 900HP truck for 5,000.00! In order to reach your goal you have to start big or else your going to be replacing parts left and right. Its cheaper to do it right the first time.


A 400 HP budget is when you build your setup around a platform that already exist. like using stock parts, engine, drivetrain etc.
And you build it over a period of time, not in a weekend.
IMO a 400HP budget consist of bolt-ons a cam and some trans work.
4000.00 should get you there.

When i first built my truck I said 12's is all i want.
Cam, 6.0, transmission, tune. I was there!

Now I want to play with the big dogs, My engine and tranny is sold!
New setup cost 4X much as my old 400HP setup.

But, "you gotta pay to play"

 

This is very true. I started out just adding bolt ons to my 5.3 then upgraded to a 6.0 with a cam.
Blew 7 transmissions and some other junk upgraded to some better stuff in the rear,trans heads...all in all it cost alot more down the road as you get used to the speed your at cause your never really happy.

 

Then there are grades of "dependable" at 900hp... But one thing is for sure, you won't even get undependable 900 hp for $5k.

Truer words...

 

lol, yea your right!

 

As someone who decided to go turbo a year ago and is JUST NOW about done ironing out the little problems, I have to say that David's post is dead-on correct. The more power you make, the more it costs to make more. Unless you're planning on a *****-to-the-wall all-out build, do a single. It will be cheaper and easier to build (one turbo, one wastegate, one BOV, one oil supply line, one oil drain, one manifold, one downpipe, etc etc), and will be cheaper and easier to maintain. Someone else above said that you can't build a 100% reliable high HP setup. This is also correct. If you're going with a turbo setup, expect to spend a fairly significant amount of time maintaining it (gaskets failing, bolts breaking or backing out, oil lines leaking, couplers coming loose, etc etc). The fewer parts you have to maintain, the easier that job will be. I was considering twins when I first started going down the turbo path, and I am very glad that I did a single. Twin turbo sounds cool, but unless you absolutely NEED both turbos, don't do it.

 

eh, the maintenance is about the same for both IMO.

The cost more than doubles though.

A great illustration of the "there's no 100% reliability" is how you spend your free time: stock or lightly modded vs. high hp...

light mods: movies, kickin back, relaxing
high hp: changing plugs, tightening loose stuff (again) that you will tighten again next weekend, cleaning oil off the floor, changing oil, figuring out why it won't start this week, shopping for tires...