Turbo Help Please

[champ7fl]

So I was trying to convert my syclone back to as stock conditions as possibly, at lease looking stock. So I couldn't mount my wastegate solenoid properly cause I didn't have a bolt hole to mount to. And I didn't have a bolt hole cause I don't think my turbo is stock. It has a small mitsubisi logo on, but doesn't have the lettering on the compressor housing. Hopefully someone can reference the numbers and let me know what it is. Or point me in the right direction as to finiding ot exactly what it is I'm running. Hopefully It's not a different housing with completely different internals. Please let me know, I need some luck or good news this month. So far this truck has been a nightmare. Hopefully I did this picture thing right to. Thanks

numbers engraved are 49179-04100 980424006

raised numbers are 49179-54 00

 

[Divergent Lightning]

The turbo you have is the 20g compressor. So either it is a hybrid turbo or you have a full fledged Mitsubishi 20g.

If you want to go completely back to stock, I can trade the stock one I have for your 20g.

 

[champ7fl]

I figured it was a 20g, but wasn't sure. But what size is it? Not to familiar with it. I know the housings come in different sizes, but are all 20g internals the same? And as far as the housing, will the numbers tell what size it is, or do I have to measure. And if I have to measure, where do I measure, from wehere to where? Diameter, Circumferance?? Thanks

 

[Divergent Lightning]

http://www.northeastsyty.com/uploader/index.php

You can post pics here

The internals are different. The 20g has a larger compressor foremost.

 

[champ7fl]

Thanks, I tried that site first to host pictures, it would load up, but never complete, just say cannot find server for page or something. Bad service on a dial up line, only connect at 24000, sucks let me tell you. I have them posted in an album here
http://www.imagestation.com/album/?id=4287087213
Anyway. So how do I find out what housing I have 10cm, 12cm, 14cm? Cause I don't want a lot of lag, and from what I hear the 14cm has that. I can't really tell by driving it how it is. For 1 thing the trucks not running right, couple little problems. And 2nd, I have nothing to compare it to. i've never been in a stock syclone, or a modded one at that. My buddy drove my sy and said that mine seems slower than his was (he sold his years ago) and his was stock. My sy will sometime bost up to 10 and drop down, sometime boost to 15, then drop down, and tonight it went to 15, then bounced back and forth from 11psi-13ish. I thought it might have been the wastegate or a boost leak or something, but do you think maybe it's the turbo, that it doesn't have much top end? I'd like to meet up with someone so they can physically see my truck and let me know what the deal is. Thanks for the help[/url]

 

[sy112]

not sure on how to identify, but I figure it would be wour wastegate for the poor boost control. Have you tried adjusting it to see if it gets better. But another option is your truck is running like crap. Have you done a tune up lately. Cause I believe if you are getting bad enough retard then it also pulls boost which is what might be happening. Honestly I haven't messed with a 20g setup before, but I would personally do a good tune up, mess with the wastegate or maybe try a www.boostvalve.com to get your boost lined out. Cause with a 20g you should just be seeing lag on spool up, which would be pretty evident, not making everything else run weird.

just my .02

 

[champ7fl]

Thanks for the input. I've got the parts to do an ignition tune up (cap, rotor, wires, plugs). I'll also adjust the timing and probably change fuel filter and pcv valve. It's a little early for an oil change, but it couldn't hurt either. i've just been tracking down other issues with the truck. My main concern was figuring out what turbo i have on there. I tried adjusting the wastegate rod today, but had a hard time getting to it, and couldn't get to the clip (couldn't even see or feel it). What should base boost be (if I ran the actuator straight to the turbo outlet bypassing the solenoid)? Hopefully I can run datamaster or something sometime soon and see what my problems are.

 

[93ty475]

fwiw i had a 20g on my sy when i bought it...it had the 14g exhaust housing on it...you must do a converter change to get that turbo to spool for a launch...i could only hold about 2150 rpm's and was lucky if i ever got .5 to 1 lb of boost when holding it at the line...other than that, it was slightly better than a stock turbo until about the last 100 or so yds in the quarter mile...seemed to run out of breath right at the end...or at least in my truck...hth

 

[Divergent Lightning]

I tried adjusting the wastegate rod today, but had a hard time getting to it, and couldn't get to the clip (couldn't even see or feel it).

Take off the passenger side wheel well. It makes things a hell of a lot easier.

 

[champ7fl]

Thanks for the tip on the wheel well. As for m launch, sometime to turbo will let me spool up 10 lbs before I get out of the whole, other times only 2 lbs or so. The truck changes the way is drives everyday. i'll go through my tune up and hopefully get ecerything dialed in correctly. So how could you tell your housing was a 14g? This is the exhaust side right? All 20g compressors are the same I take it, only the exhaust side changes? If that's the case I guess there's numbers on the exhaust housing for me to reference? Do a lot of people just put a 20g compressor on a stock exhaust side? It sucks not knowing what you have. Once I figure it out I'll just be like "ok, that's cool i guess". and move on. But I just want to know what I'm starting with, what my building blocks are. Which was my main reason for wanting to go back to stock as much as possible. I'll try and find some numbers on the exhaust side when I work on it today. Thanks for the help and input.

 

[Ian Turgeon]

check the numbers on the exhaust housing. Yes, your welcome

non H turbine(stock) 8cm: 79-12100
H turbine 12cm: 79-11300
H turbine 14cm: 79-14300

20g referres to the comp wheel. Theres lots of options, but we usually see them in 20g/14cm combos. the center section is the same as stock, but the true 20g uses an H turbine wheel (bigger then stock) which slides into the 12 or 14cm housings. the 20g comp wheel is bigger, so it requires either the correct 20g comp housing, or a machined stock housing.

From the inital pic on your gallery, it looks like the 20g housing. (BTW) they drill 2 holes in the flat part on the comp housing for the wg.

 

[champ7fl]

That's some very helpful info, thanks. My turbo has the 2 holes for the wg, but not the hole for the solenoid (which was the initial issue). I guess I can have a machine shop do that for me. I started working on the sy today and got fed up, only got the plugs on the driver's side changed, and the cap and rotor. I had to fight with the sun, tear apart the garage to find my swivel plug socket thingy, try to take the wheels of but the center cap lock nut key is stripped, then realized my 2 driver's side tires are on the wrong way (I guess I'd have awesome traction in reverse). I just said screw it and cleaned the bike and went for a ride to ease my mind. To much for the past couple days. I'll take the wheel well off tomorrow, finish the plug job, check and adjust the wastegate rod accordingly, and pull some numbers of the exhaust housing. Why can't anything be simple to work on?? I'll let you know what the turbo tells me tomorrow. Thanks

 

[champ7fl]

So i pulled the numbers off the exhaust housing and it's 79-14300 (143 are engraved numbers and the rest are raised). So judging by what was said that's the 14cm housing. So what can I expect from this turbo, on a stock torque converter? I don't want top end, Just the low end power, 0-60 off the line sorta thing. Do I need a stall in order to get the best out of this turbo, cause I already did some tranny work (just shift kit, servos, springs, bands, clutches..stock converter). If so, what size stall, and would this turbo have less lag then? Do they make a 10cm housing for the exhaust side? Is the 14cm in high demand where I could find someone to trade a 10cm for my 14, is it worth it to do that? What can I expect? Thanks. (now to go work on it some more).

 

[Ian Turgeon]

i believe the 10cm housing fits the non H tdo6 turbine, which means to run it on yours, it would need to be machined to fit. the 12 and 14 will bolt on, however the 12 is usually very difficult to find.

I cant tell you about the desireability of the 14, but I wouldnt think there would be much of a demand for em.

and yes, stock converter SHOULD be an absolute dog on the 14cm housing. It would be close/marginal on the 12cm.

From my experience you will most likely be looking at a 2500-3000k stall for that exhaust housing.

 

[champ7fl]

Thanks again. I guess I'll look around for a stall converter then. I guess the 911, from what I've read a lot of people say they work great. Again, thanks for the input. Next time I'm in Orlando maybe we can meet up. I used to be up there every other weekend. Now that I know what I have, I'll search around and find out what I can do with it.