• Welcome to The Truck Stop! We see you haven't REGISTERED yet.

    Your truck knowledge is missing!
    • Registration is FREE , all we need is your birthday and email. (We don't share ANY data with ANYONE)
    • We have tons of knowledge here for your diesel truck!
    • Post your own topics and reply to existing threads to help others out!
    • NO ADS! The site is fully functional and ad free!
    CLICK HERE TO REGISTER!

    Problems registering? Click here to contact us!

    Already registered, but need a PASSWORD RESET? CLICK HERE TO RESET YOUR PASSWORD!

Replacement turbo

Waiting waiting waiting! I want one so bad I can taste the diesel fumes!:ihih:
Man this is cool project, finally something that will be an all round benefit to our trucks and not break the bank! (I hope). Thanks so much you guys for being the ground breakers for us who are not so adventurous!
 
RE Mitsubishi replacement turbo

Well, I installed the Chinese Turbo today. Man the Chinese make nice cast iron, The Turbo turned a nice light gray after having a few 1000 degree runs put through it.

I am going to give the turbo time to break in and then get some figures and boost pressure numbers. Best I ever saw today was 13 psi at full throttle and 3300 rpm. Had to slow it down, it was hot today and humid, so not ideal conditions.

First impressions are that the turbo doesn't make boost as fast as the Mitsubishi. This may just be a break in thing. I believe the Mitsubishi did the same thing and got better as it wore in. Cruising at highway seed 70 MPH and 2400 RPM boost gage shows 1.5 psi, Mitsubishi showed 3 PSI. The exhaust sounds louder and the truck is quieter with the Chinese turbo. The truck also seems to get rpm quicker with Chinese turbo and less boost, not sure why. The Chinese turbo also is a little louder (Turbo whistle) than the Mitsubishi.

I think the Chinese turbo is louder and boosts slightly different because of the compressor wheel design. The Mitsubishi turbo compressor wheel has all of the vanes equal height. The Chinese turbo has staggered height vanes. I am happy with it, I will give it time to break in and see what happens.

I did notice the truck smoked black smoke from the exhaust, where it didn't before. This is starting to clear up though, may be the turbo bearings need to burnish in.

I did notice the fuel rate was down at highway speed, I have a full optical bump on top of the heath HP-4 just so you guys know,I think that is why I have black smoke. I don;t think I could put much more fuel through it than I am now under full pedal.
 
Give her time Slim and let us know in a week or two how she is doing. I think my puter has an adaptive forgetting brain.
 
bud9899 said:
Give her time Slim and let us know in a week or two how she is doing. I think my puter has an adaptive forgetting brain.
Click to expand...

I know, but patience has never been my strong point. The turbo ran much better later in the day after a few 20 mile highway runs.

I think this will be a keeper, fuel mileage and some power. The engine loves to breath with an open exhaust and boost from 1800 rpm up.

In reality we really don't need boost below 1800 rpm. The 6.5 is very capable of making torque to 1800 rpm with no problem. The turbo will make boost below 1800, actually from 1500 with a load.

Trying to get a GTECH to get some numbers. Seat of pants feel tells me it is ok, I am just being to picky.
 
Is there any efficiency loss going from single scroll to double scroll? It looks like it could be stricted a bit due to the bigger pattern of the t-4 vs the t3. Do you see this being an issue at all?
 
No losses at all that I can assertain, with exception of Slightly slower spool up turbo will still allow you to get out of harm's way if need be just not as zippy as a TM equipped GM-8, near as best I can describe this turbo, it isn't a race turbo, it is a torqing turbo.

Slim's trans is a manual, so he can hold in lower gear longer than my auto 4L80 does, this is what I'm going to see what Bill Heath might be able to do in way of tweaking the flash, which was tailored around the GM-x series turbos operating profile.
 
Last edited:
Turbine Doc said:
No losses at all that I can assertain, with exception of Slightly slower spool up turbo will still allow you to get out of harm's way if need be just not as zippy as a TM equipped GM-8, near as best I can describe this turbo, it isn't a race turbo, it is a torqing turbo.

Slim's trans is a manual, so he can hold in lower gear longer than my auto 4L80 does, this is what I'm going to see what Bill Heath might be able to do in way of tweaking the flash, which was tailored around the GM-x series turbos operating profile.
Click to expand...

YEAH, what he said. :iagree::iagree:

The 6.5 loves 1800 rpm to around 2700 rpm as an operating range, The GM -* is only good to about 2200 RPM then it becomes a liability as far as efficiency is concerned. The exhaust becomes restricted.
 
Last edited by a moderator:
I am wondering, with a stock ecm and currently using the vac wastegate system, could I actually put this turbo in and have success without further changes. Do I need boost gauges first and a reflash ecm or Heath HP-4. I plan on doing everything, but fuel economy is my biggest goal. If I could see 21-22 mpg, I would jump for joy!
I plan on doing a DIY intercooler, but not right away. I see the Doc doesn't have one and I am thinking for the time being I will do without. Does economy increase with the intercooler or not. With the fuel prices being nuts, every bit of economy counts, I am in for the long haul!(no pun intended):driving:
 
Oh but I do have a IC see in my sig right after the K1500 part; here is my web page showing the install http://myweb.cableone.net/tbogemirep/

boost levels would be okay to run gaugeless, I'm not sure however how a stock PCM would react with boost levels of the TDO-7 or Chinese clone, vs what it expected to see with a GM-X turbo mite have to run a fooler so PCM would remain happy. Gauges are required IMO on any 6.5 should have been part of original equipment spec, they are valuable troubleshooting tools.
 
Last edited:
:iagree:
That is a crucial step, I will agree with you 100%. If I had gauges I probably wouldn't have needed that tranny rebuild in my Sig line. I want the HP4 or the HPT. Not convinced I want the perf. one. We'll see how much green the Missus will let me spend. I am convinced of the improved turbo change for sure.
 
Let me see if I have this right:

The biggest problem with the Heath computer and Mit turbo is the comp doesn't wind out the lower gears far enough?

If that's all, I'm sure it'd be possible to get Heath to custom tune a chip with a wee bit more 1st and 2nd.

Also, is it just my imagination, or does/do this/these turbo(s) seem to be a much better match to the 6.5's personality than the GM-X?

Also, how does the Mit compare to the GM-X, especially the GM-4 for low-end grunt?

Thanks Slim and TD for going out and testing these for us. It's the inginuity and resourcefulness of people like you that has gotten the 6.2/6.5 to were it is now.

Any Mfg or part #/model# info for the Chinese turbo?
 
Last edited:
Not that exactly, It's a subtle difference one you could easily live with as is, but since we all want all that the 6.5 can deliver, I want guys at Heath to take as much time as they need to refine out the subtle difference. I'm hoping to get it headed their way within the month, it will probably be low on priority as Bonneville truck is main focus right now;

Plenty of low end grunt comparable to GM-8 (only one I have to compare to) but GM turbo spools a little quicker, GM turbo starts falling of on boostability off at 2600 rpm, TDO-7 continues to boost/breathe up there, so a little tweaking on fuel & timing I think this will be the turbo it should have come with to begin with, moves a lot of CFM without having to push a lot of compressor boost/backpressure stay tuned for updates.
 
Last edited:
Can't wait to get a dyno result. As for someone like me, whose truck is mainly for working/plowing, I never go past 2200 and thats highway speed, I usaully drive at 1700-2000 for economic reasons, I might be better off with a GM-8.
 
Last edited:
I would really like to see a spec sheet on the TD07-22a. I haven't been able to find one. I would like to know the compressor and turbine A/R so I can compare to some other products out there. If anyone has that info, I would like to see it. I know we have the measurements, so maybe we can calculate the A/R's. Math is not my strong point!
 
Well a few days of running Turbine Docs turbo :sifone: and it has come to life. I think the bearings needed to be broke in, nice smooth spool up and smooth progressive boost as fuel is added.

The Turbo has one draw back though:: it is noisy, I can hear it spool up and whine through about 7 psi boost. I use the stock air box so I can hear it through the stock setup. The Mitsubishi is a much quieter design than this.

I think this may be the only draw back, I might be able to get a quieter design if this is a problem. :puke:

I guess I need to remove it and let Turbine Doc have it, so we get a second opinion on the noise part. :cryin:
 
You must log in or register to reply here.
Back
Top