Anyone install a standard rotation turbo? - Diesel Forum

Mick · 12-02-2005, 04:29 AM

I'm thinking of pulling the turbo off my Mustang - see link in sig, and installing it in place of the existing turbo on the truck. I'm wondering if there is an existing up pipe that points forward to allow for the standard rotation turbo or if this is something I will have to make. I'll have to do something with the turbo pedistal too.

Just thinking out loud for now while I gather parts for this project.

gtspowerstroke · 12-02-2005, 09:25 AM

You'll most likely have to completely fab up everything new. By looking in your pics it looks like the exhaust housing is WAY to small. What kind of turbo is it? Do you have a compressor map for it? I'd do a little research to see if it has any chance of actually working before you start working on all the fab work to get it in.

Big K · 12-02-2005, 02:17 PM

Yea,

Would need some specs on the turbo to figure out if it is even big enough.

(My Guess is that it isn't from the look of it) [img]/ubbthreads/images/graemlins/shrug.gif[/img]

Mick · 12-03-2005, 01:51 AM

Yes, that picture does make the turbo look pretty small. The turbo is a Precision GT4067HPS. That means it has a GT40 exhaust wheel, 67mm compressor wheel, 4" inlet, 3" outlet, and a .81 A/R exhaust housing. The turbo is supposed to be able supply enough air for a 835 hp gas engine and about 520 hp for diesel engine. How true that is I don't know, but it put my car in the 9's pretty easily 3211 race weight.

The compressor map is not so verticle like our current turbo, but lays over a bit. That means this turbo doesn't hit the "wall" as quickly as the pressure ratio increases as the turbo nears the maximum airflow.

Plans are to run the 46mm Tial external wastegate. I don't mind fabbing up everything. I just didn't want to do it over agian if it has already been done and standard rotation turbo adapters are available for our trucks.

I'm looking for no lag what so ever. I don't want to see a puff of smoke with the injectors when I step on the throttle. The small exhaust housing in a must with those goals. I'll use two wastegates if needed so the engine isn't restricted during the upper rpms. I'll start with one and see if I get "boost creep".

Still may end up with twins, but going to try a mid size single first.

gtspowerstroke · 12-04-2005, 02:52 AM

Well unless you cut your fuel back a ton until it sees boost I think you are expecting to much. You will have an initial puff. If it's a GT40 that should give you a lot of air. The small housing will help it spool up quick but it's just going to be hard saying how quick for sure. I think this is one of those you'll have to try it and see what it does. As for adaptors I don't know of anyone that makes one other than Hypermax that uses the H2E. If your turbo has the same flange it may work. Would just have to do some research. I think David at DI has had a GT40 or something like that on his but I don't know if it's a one off thing or if he makes a kit for it.

Mick · 12-04-2005, 05:07 AM

Only the exhaust wheel is off of a GT40 turbo. The rest of the turbo has standard Garrett markings, except the compressor housing which has all the markings bead/sand blasted off. I guess that is Precision's key to making that particular turbo flow decent numbers in such a small package.

You're probably right with an initial puff. I can live with that. I hope to reduce initial puff to something that doesn't shut intersections down like my truck does now.

This will take a little trial and error and some fab work. Good thing I enjoy that stuff. There is a .64 A/R exhaust housing I can put on this turbo. That should spool up REAL quick! Poor external will spend most of it's life wide open though.

I'm pretty sure I can detune the MAP Simulator to cut back fuel a little to fine tune the fuel curve, or get a custom burn chip. I'm going to try to tune with spoolup quickness and controlled boost first. I hate to cut back fuel if air can be added.

Thanks for the feedback - keeps me thinking, recalculating and in the end makes for less overall work come fab time.

I still have to throw oil at this thing and a real fuel system.

gtspowerstroke · 12-04-2005, 05:23 AM

What's the stock GT40 wheel size? Is this turbo supposed to flow more than the stock GT40? I would asume so. Honestly I don't know how small you are going to be able to go on the turbine housing and have it work right. I think what you have now is going to be the smallest you are going to want to attempt. Like you said though it's just goint to take some trial and error and some playing with things and tuneing it in to get it to work right. This is how stuff is found out to work or not though so who knows maybe you will stuble on the next best latest greatest thing! [img]/ubbthreads/images/graemlins/biggrin.gif[/img]

Mick · 12-04-2005, 09:53 PM

I also received a few e-mails with some good information. It looks like my goals can be met, but keeping turbo speed under control will be the largest obsticle. I have a few different set ups in my head right now. Just going to have to build it and see.

smokyred · 12-05-2005, 01:42 AM

Go for it man, if you have the time and ability to fabricate something like that, that's awesome. We could use another option besides the H2E, that thing is expensive, but I guess it works.

Dave