Diesel Place banner
1 - 20 of 144 Posts

·
Just add Fuel
Joined
·
619 Posts
Discussion Starter · #1 ·
I’ve been working toward a turbo swap for quite a while now and I think I’m finally getting close to the install so I thought I would start a thread to share some info and throw some photos out there for you guys.

My current setup is in my signature, but since I update my signature as I go, here is the engine/fuel related stuff:


  • 4” Custom stainless exhaust with large magnaflow muffler.
  • 2.5” Custom stainless crossover with external wastegate bypassing passenger side manifold – controlled by factory boost control system.
  • K47 air box/filter
  • #9 resistor
  • Quadstar87 tune – I’ll leave it up to Quadstar87 if he wants to comment/share details on the current tune
  • GM8
  • Fuel prefilter, DRP02 fuel pump, modified FFM (FTB mods), modified fuel inlet fitting in injection pump, and a fuel pressure sensor verifying about 18 psi into the injection pump
  • FACTORY DOWNPIPE – I never updated this since I have been planning this turbo upgrade with a custom 3.5” stainless downpipe.
I’m really pretty happy with the way the truck currently runs. It isn’t what I would call a hot rod, but it does get around pretty decent and is fun to drive.


The turbo I’ll be trying is an S300 with a 1.10 A/R, T4 turbine housing. The compressor wheel measures about 64.5/91.4mm.The turbine measures about 76.2/67.6mm.In its original application it supported 285 HP with 30 psi of boost.I’ve smoothed out both the compressor and the turbine housing to make them look nice and I’m planning to ceramic coat the turbine housing and duracoat the compressor housing.

Progress on this thread will be a little slow since I have quite a few projects going on right now.

Pics:
1. Test fit from a couple years ago
2. Turbine housing on spare manifold with adapter plate
3. Shiny turbine housing
4. Shiny compressor housing
5. Blasted turbine, shiny compressor
 

Attachments

·
Premium Member
Joined
·
12,490 Posts
Glad to see you are getting close, looking forward to seeing how/where this turbo spools. Still think the turbine is large, more in our thinking as a primary with a GM-X secondary in a compound set-up....
 

·
Registered
Joined
·
51 Posts
Good luck. Guys like you are a great benefit to guys like me!
 

·
Registered
Joined
·
3,149 Posts
What were you going to use the truck for?
That should be a nice turbo for highway driving and towing.
 

·
Just add Fuel
Joined
·
619 Posts
Discussion Starter · #6 ·
Good luck. Guys like you are a great benefit to guys like me!
Thanks! I've learned a lot from what others have posted. Just trying to give some back.

I'm really quite anxious to find out if the 6.5 can spin this thing up. We'll all find out together.
 

·
Just add Fuel
Joined
·
619 Posts
Discussion Starter · #7 ·
What were you going to use the truck for?
That should be a nice turbo for highway driving and towing.
The truck is my DD in the winter when the CBR gets parked. Spends most of the time on the freeway. Hauls wood. Plows snow. 4.10 gears and the 4L80 keep RPM over 2000 when loaded.
 

·
Premium Member
Joined
·
12,490 Posts

·
Premium Member
Joined
·
12,490 Posts
What were you going to use the truck for?
That should be a nice turbo for highway driving and towing.
you might find this an interesting quote, and will be the ultimate deciding factor with the OP's testing...............
 

Attachments

  • Like
Reactions: JorgeNY

·
Premium Member
Joined
·
12,490 Posts
maybe - maybe not, I have no comment either way, read the hummer forums yourself and see what they think, but then again i guess we will have James to give us his input won't we....:bow:
as always, valuable input chris, thanks for that....:thumb: way to participate...
 

·
Just add Fuel
Joined
·
619 Posts
Discussion Starter · #12 ·
i guess we will have James to give us his input won't we....:bow:
I hope you're patient... 'Cause I am slow!

I am prepared for a slow spool. That will likely be ok for what I want in a truck. I believe that some thoughtful shift programming can go a long way toward eliminating - or at least masking - slow spool.
 

·
Registered
Joined
·
2,896 Posts
Like I have always said, there is no perfect turbo, it all comes down to how it's being driven & what it's being used for.. the link the fellas posted shows that.. no turbo can be considered best in every situation...

And James, if I wasn't a patient person I would have given up a long time ago on the P motor project...
 

·
Just add Fuel
Joined
·
619 Posts
Discussion Starter · #14 ·
Adapter Plate

Here are a couple photos of the adapter plate. I didn't take a lot of time with this. If this turbo works out ok, then I will likely be building an exhaust manifold/header with the correct flange for the turbo. Time will tell.
 

Attachments

·
Just add Fuel
Joined
·
619 Posts
Discussion Starter · #15 ·
I'm just about set up to apply the turbo-X to the turbine housing. Hoping to get that done today. If things go really well, maybe I'll get the clearcoat on the compressor housing as well.
 

·
Premium Member
Joined
·
12,490 Posts
Here are a couple photos of the adapter plate. I didn't take a lot of time with this. If this turbo works out ok, then I will likely be building an exhaust manifold/header with the correct flange for the turbo. Time will tell.
the adapter goes from the stock gm(T-3) to the new turbo, which is T-4, correct?
 

·
Just add Fuel
Joined
·
619 Posts
Discussion Starter · #17 ·
Yes.

Turbine is sprayed. Baking now. Will get some photos up in a bit.
 

·
Just add Fuel
Joined
·
619 Posts
Discussion Starter · #18 ·
Well, maybe I shouldn't say yes so quickly. I found a couple different dimensions online indicating T4. This turbine matches some drawings but not others. Still have that drawing I sent you? Maybe you can verify?
 

·
Just add Fuel
Joined
·
619 Posts
Discussion Starter · #19 ·
I started out by making a stand for the housing so that I could spin it around for the best angle to spray it. Just grabbed some scrap from around the shop and tacked it together.


I test fit the turbine with stand in the oven before getting started. You would think that a turbine housing would fit easily in an oven, but it gets kind of tight. I did think to check this while I was building the stand so, I made the stand only as tall as it had to be.


I then cleaned it repeatedly with acetone, masked off the areas I didn't want coated, and put on a coating of the turbo-X. I sprayed it through an Iwata air brush with 40 psi. The control had to be pulled almost all of the way back to get any paint to flow and even then it flowed pretty slow. Next time I spray, I think I'll plan to thin it a bit.


Right now the turbine housing is baking in the oven (about 15 minutes left) and I'm preparing to spray some clear duracoat on the compressor.
 

Attachments

·
Premium Member
Joined
·
12,490 Posts
Well, maybe I shouldn't say yes so quickly. I found a couple different dimensions online indicating T4. This turbine matches some drawings but not others. Still have that drawing I sent you? Maybe you can verify?
yeah, got it somewheres, but we did a big puter upgrade in january, and still have not went through our 2 TB external disk of pics and info, so i cant say where we have it, but to me it looks like a T4, it came from a JD 6068T didnt it? this engine was T4 for sure, as were most of the JD I6's......
 
1 - 20 of 144 Posts
Top