Sounds like 94AWD knows what he's talking about.

 

94AWDcoupe, I've always understood all the technical reasons you claim make the 20G turbo unreliable, and know how they are assembled and balanced. That does not change the fact that I, nor any of the people I know have had 20G failures of any nature. I ran one for years, put a lot of hard miles on it, and it was solid, regardless if it was VSR balanced or not. No seal, shaft, thrust bearing, or any other problems with it…ever. I will accept that the 20Gs may not be what you'd consider an ideal turbo, using the best technology, using your preferred assembly and balancing methods. That does not change the fact that I've had nothing but very good experience with mine, and have not even heard of any failure rates of these over and above other popular turbos for DSMs. I've always understood that these were hybrid turbos with technically mis-matched components (much like many hybrid turbos in the popular T3/4 hybrid family), and had accepted that they are a compromise, but a damn well working one IMHO. The fact that the 20G was/is a compromise (for bolt-up reasons) is pretty much common knowledge with the old school DSM guys anyway, so we’ll have no disagreement there. I still stand by my statement that these were not unreliable turbos on DSMs, regardless if their inherent design and manufacturing disadvantages against your preferred turbo vendor.

No disrespect, but I'm more looking for actual customer and/or vendor claims of unreliability, not technical reasoning on why they should be unreliable. I feel real-world examples would hold much more weight in testimony to the actual reliability of these units. If you’ve had one fail on you, that is unfortunate, but no line of turbos are free from defects (even VSR balanced turbos), and many enjoyed great reliability from these units.

Perhaps some vendors like Dave Buschur, or other actual customers would care to elaborate on the failure rates of these turbos.

I think it’s time to start a new thread on the reliability of 20Gs instead of further protracting this debate.

 

94AWDcoupe,

In your opinion which turbo is the better way to go, 50trim or 3076r? Most people on here say the 3076r is better, but im wondering why its better? does it hold boost better to redline? most people with the 3076r make 450whp on pump and alky, but the 50trim guys are making 470-480whp on pump and alky. i know the 50trim was popular with the DSM crowd, so i figure you would have good knowledge about it. i am looking for a nice spooling set up (i live in an area that is 6500ft above sea level, which is why im staying away from the 35r) for street/drag racing on pump and alky. i would definitely appreciate your help. thanks!

 

Well I have a friend who has a fully Modded STI. He has an FP Green, which I believe is a 20g. I dont think the turbo is on the car for a year, and it's already gone bad. Correct me if Im wrong about the FP Green.

 

But has anyone ever experienced a 60-1 or 62-1 just curious .. it should be good enough to make 400+whp and have great spool + top end....

 

The FP green is not a 20G.

 

Ok, what is it.

 

stock will give you the best spool and if you want to upgrade go with 20g

 

Actually something smaller than stock will give the best spool, if when you're saying "best" you mean quickest.

 

Rather than type out another lengthy explanation, I'll give you a direct link:

http://linux.forcedperformance.net/m...Code=DSM-Turbo

Give that a read and let us know if you have any additional questions. I hope that helps.

 

I have seen a dozen 20g turbo cars around here over the years. Over half died a very early death. Sorry this is just my observation.

The green is a 50trim/tdo6h turbo.

I would use a 50/stage3 in a pte housing over a gt3076.

here is a 2.4 with the new 50trim bb. http://www.srtforums.com/forums/show...3&page=1&pp=15

here is a nice graph of the 3076 on a 2.0 (laggy)
http://linux.forcedperformance.net/m...ctane_full.jpg

at 4500rpm the 50/2.4 is making 450whp.
at 4500rpm the 3076/2.0 is making 320whp.
have that diff is the turbo, the other half is the stroke.

I like a responsive turbo setup. Nothing better than instant torque.
the 3076 is capable of more power. if power is what your are after go with a 35r. its only a few hundred rpm laggier than 3076.

My 35r is setup to have very near the same spool as a stock evo8. Yet it makes 560+whp. FUN.

 

So you are claiming an over 50% failure rate then. That would be the most horrifically defective turbocharger product line in the history of turbocharging. I'm sorry, but in all due respect for your and your Mirage, I do not believe you are providing an accurate representation of 20G DSM turbo reliability. What you are claiming would have made wild controversy on the Talon digest, and I don't recall that happening regarding the 20G for DSMs. It also goes against my own direct experience with 20G turbos for DSMs.

 

94Awd, dont you think a 3076 on a 2.4 will out perform a 20g on a 2.4? Also are you saying yoyr 35r will spool up close to 3500 rpm?

 

Yep, by alot. Most importantly because it can flow a LOT more exhaust gas and is just a larger turbo.

 

Once a tuner (I wont mention names because im not 100% on this) said. The 50 trim simply wont out perform a gt3076 topend because it runs out of steam. I could be wrong if it was them or not but im pretty sure. Again I would consider the 3037.. Mine spools like a 3071 and makes 3076 top end. However im stressing mine has a .63 a/r and 84 trim turbine.