Turbine wheel clipped.

 

The turbine wheel is trimmed.

Yes, it is confusing to someone who has not followed threads with the explanations.

 

So AMS's GT37 really isn't a GT37 because GT37 isn't stamped on the side, right? Guess they should have called it a GT35Plus or something like that? And Buschur could have named his turbo the Buschur Racing 16Gwith20Gwheelandtrimmedturbine turbo. Personally, I think 20G sounds better. . . and makes more sense.

EVOlutionary

 

20g gives the ipmression that it is a bigger turbo for those who, as Ted mentioned, did not follow the sordid details of the entire "20g-6/20g-5" affair.

Mitsu calls the 9 and 05 8 turbos as "16g." Nowhere does mistu use 20g. Changing the compressor wheel, IMO, does not make a turbo 20g. It is more accurate to call it a 16g-9-5 or 16g-9-6. It is closer to the truth to use 16g than 20g. But vendors want to sell and the average buyer will not do enough research to get to the bottom of the nomenclature. Vendors have a vested interest in naming a 16g-9-5 or 16g-9-6 a 20g. It makes the turbo seems much different than the stock 9 turbo.

 

i have no problem calling it a 20g, especially if you compare it to the original 16g, and not the 16g on steroids thats in the IX.

 

Ok, so let us say you had an 05 Evo VIII with the 16g and 10.5 hotside. You also had cams, cam gears, TBE, drop-in filter. The car puts down 350 hp on a dynojet. Would you switch to the so-called 20g-5? How much would you gain? Is it worth it? How would you before and after power band look like. Are you going to lose power down low to gain a smidgen up top?

 

I give up. From now on I'm going to call my turbo a 18G just for confusion.

 

17.5g gets my vote.

 

FYI

https://www.evolutionm.net/forums/sh...light=real+20g

Another guy says he has the real 20g. Good grief!!! How many 20gs are there?

 

now I don't know what to read.
You guys are funny

 

actually Garret/Precision doesnt make a GT37R, only a non ball bearing Gt37. AMS made that name.

 

That's because it's the TD06-20g that cannot use the stock manifold.

Why are you so hung up on this. We all understand and recognize that the 20g-9-5 and 20g-9-6 are 16g turbos with 20g wheels. Calling it a 16g-9-5 or 16g-9-6 makes no sense, because it doesn't say anything about the 20g wheel. It doesn't matter what the housing is or says - it's a 20g.

 

Are you making 350 on pump gas or race gas? If you are making 350 on higher boost and race gas, Buschur's 20G9-5 should give around 30whp gain up top and a bit less torque gain. The 20G9-5 will hold more boost at higher RPMs giving more power. Spool up may be 100-200 rpm later without changing anything else. Now if you are only going to run it on pump gas, you may be able to get away with a couple PSI more pressure and a little bit more power, but probably not as much as with high boost and race gas. Here is my graph, but I changed cams at the same time, so it is not really relevent to your question.
https://www.evolutionm.net/forums/sh...d.php?t=202727

 

Don't forget the "real" price on that one. You might as well get a 50trim/3065 kit

 

You are correct sir. Please re-read my post - what I was saying is that even though their turbo is not built off of a true GT37, everyone still recognizes it as a 37 and calls it by that name. Same with the 16G/20G story.


EVOlutionary