On a budget, I think that going the junkyard diesel turbo will be way cheaper than the twin t3 route.

My question is, what truck should I yank the turbo off of? Any have any experince on what kind of boost this turbo will produce, and what it will cost?
TIA

 

The turbo from a 5.9 Dodge Cummins Turbo Diesel is very big, but the turbine housing is designed to spool at low RPM and not rev very high. If you have a near stock TPI, it would work great. I hope you have tires..high torque TPI plus high torque turbo, you're looking at well over 500++ rwtq.

The intercooler from the same truck is HUGE, but I know nothing of its efficiency. 3.5 in and out I believe, and over 40 inches wide.

The turbo is a Holset model. Not too big, but there are several upgrades available, including a significant size jump in the turbine housing (readily available). It's a common turbo to mod.

 

a

 

 

Oops, meant to actually post something in regards to the part i quoted above...

What i meant to say is,

How hard is it to put a Cummins turbo on a 3rd gen firebird... Is there any fabrication involved? (I'm a turbo newbie )

 

its a bitch to change the plugs...so it will definetly have to be fabricated

 

:sillylol:

 

 

Back to the topic, concensus is that the holset is the best (correct size and reasonably pleantiful) for a low-medium boost 5.7 intercooled application?

 

I dont know about that. I have sugested the holset but a few people are telling me now that some of these places that supe up ford "power jokes" are replacing the near new turdos and are selling 'em for dirt. But then again I guess if you fond a place that did dodge cummins performanc mebee they could be had cheap too...

 

What is the name of the power stroke turbo?

 

Hey Tom,

Do you know anything about those powerstroke turbos, as in turbine/compressor size, etc? Maybe something off of those GM pickups could work too.... just a thought.

Dan

 

http://www.turbomustangs.com/forums/

lots of info here

 

well after seing how well the 5.9 turbo worked on a 2.3 I figure the one for the larger powerstroke ought to work well in a V8 application. it is true a diesel exhaust is more plentiful but....there is still the RPM factor and the diesels run such a low RPM that even with the severe, hot, and plentiful diesel exhaust is there the pumping capabilities of the motor is still within reason compared to our 350 and larger V8's I cant begin to provide you compressor maps, A/R's etc. but what I can tell you is that its likely the lag will be there but managable and reasonable which means if not knowing that stuff is a problem then you ought to be purchasing a turbo of a given value or a blower kit. this is for someone that wants to play around and make a pile of power in the process. I think the greatest feature here is that the cost associated is so much lower that: A) failure will not necessarily break you, B) a mild success paves the way for investing in a nicer turbo later and cutting/modifying the flages to fit the nicer one on the system later seems so sensible.

 

The Holset HX35W or HY35W off a Cummins truck is not a good choice for a 5.7L, it’s more appropriately sized for something about half that size. You could almost run 2 of them on an L98 (the HY35’s would work OK that way, the HX probably would spool too slowly unless then engine was really serious).

The Powerstroke/Navistar 7.3L engines came with either a Garret, TP38 or GTP38 and are closer to appropriate for a 300-400ci engine that you’re looking to see under about 650hp under boost. There’s at least 3 different turbine A/R’s available, the smallest would probably work OK for something in the 300-350 range, the biggest would be good for something in the 350-400 or so range (the middle someplace in the middle). Really, they’ve all got fairly similar compressors, but you’ll have a hard time getting a 1.10A/R turbo (biggest turbine) to spool well on a 305 unless you build yourself a killer exhaust (if you did build that exhaust then it would work well and spool OK, but most turbo cars are in the mediocre to bad exhaust design range). The big hassle with this series turbo is that it uses a single flange for the oil inlet/outlet and just about all of it’s connections are different the most other turbos requiring more fabrication to get it hooked up.

 

At this point, my focus is now to find a good powerstroke turbo. The headers are just going to be stock log manifolds on a L31 , and since it will be a low boost, intercooled set up, I think that the "smaller" Power stroke turbo will work. Thanks crossfire for the information.

 

ok if you are just getting a powerstroke truck one then how do you make sure you are getting the right one?

 

Like I said, this is a budget build up, so ball-park is accectable for the turbo size. Being that all the sizes are fairly close, I'll just be looking for a turbo in very good condition.

As far as knowing which ones are which, I'm going to do some searching to find out the different compressor, inlet, etc. size differences so I will know what I am getting.

The main thing is that someone gave me information pointing towards the power stroke as a good engine to grab a turbo from.

 

I have a friend really into powerstroke performance. He was telling me of a place with excessive amounts of stock stroke turbos because of replacing them with hi-po units. the ones they have to sell are fairly new and only lightly abused and the greatest thing is that the price was awsome. I will try to get in touch and find out who it is that has all of them.

 

Well, like I said, the compressors are one of 2 and they're pretty similar, same power range, just slightly different shape to the compressor map.

The only way that I can tell you for sure on the size is to look at the turbine housing, the large one is a 1.10 A/R, there’s one in the .96 range and one other that I’m not sure about. If you look at the Navastar line (pretty much the same as the powerstroke but considered more commercial) you’ll find similar turbos, but the 7.6L (466ci) navistar actually comes with the same compressor with the smallest (should be best spooling) turbine somewhere around a .81 A/R.

B4Ctom1, I don’t really have a use for one right now, but if you find out where to get them I’d like to know (if the price is right I may pick one up just to have it…), do you know what they’re upgrading to?

 

actually I don't I was just discussing it with him and he already has a 1 ton non-dually 2003? 7.3? truck with a magnaflow 4", a programmer, and a filter it dyno jetted to a 500 hp/1000tq rear wheel. I think he has just gotten a propane kit for it now so it will be even more, either way it smokes our friend's new lightning at the street races LOL

 

here is some cool info http://www.speedtospare.com/turbo.htm