Texas WRXer

In the future after I upgrade my tranny, I plan on doing a turbo upgrade. Currently Im looking at the 18 and 20G turbos. Im thinking I would like around 320ish WHP. How much difference is there between the two turbos? It seems that most 18Gs are making around 300WHP. I was also wondering how benificial headers would be at this power level. Are stock minifolds ok? Any suggestions would be greatly appreciated.

testes1010

I'm running a Crucial Ported & Ceramic Coated stock exhaust manifold w/ my 20G...I highly recommend it...currently putting down 326whp/292wtq...

Texas WRXer

If you did it over again would you go back with your current setup? How laggy is the 20G?

testes1010

only thing I would change is to make it a TD06H-20G instead of a TD05H-20G....

currently I hit full boost ~21psi at around 3500rpm in 3rd gear & up...

gruppe-s

iTrader: (22)

The 20G is a rather large turbo for the 2.0L motor and is somewhat laggy. It really depends on if you're talking about the TD05-20G or TD06-20G though. The TD05-20G will have very similar characteristics to the TD06-18G. We would personally consider the TD06-20G a 2.5L turbo only if you drive your car daily. However, if you have extensive headwork, you can probably get that turbo to spool substantially quicker. It's tough to say about WHP because 320 WHP on our Mustang 4WD is 384 WHP at the local dynojet. So in summary, I would recommend the 18G over the 20G for the 2.0L motor. Testes1010 TD05-20G seems to spool very quickly and this is not the norm for a 20G on a 2.0L.

As far as a manifold, with a turbo this size, your motor would definitely make more power with an aftermarket manifold. Because that turbo pushes so much more air, headers will be able to help that turbo out substantially. I would expect to see gains of ~15 WHP and ~20 WTQ with our Gruppe-S V2 header on your setup.

Thanks,

Geoff

EndlessWaltz RS

iTrader: (4)

testes1010 is also not in CA, and probably running 93 octane. But still, 21 psi at 3500rpm from a TD05 20G is pretty amazing on a 2.0L if true.

Geoff,

What would the typical spool characteristics be on a 2.0L with the TD05 20G and the TD06 18G? Say supporting mods are turbo back, header, uppipe, injecotrs of course, etc. just the basics. Im still trying to decide on a turbo for my Ver. 7 STi and I think this info would help Texas WRXer as well. Have you guys dyno'd any cars with a similar setup?

Imprezer

iTrader: (9)

Pew-pew...

It's all about TD06SH-25G with 10cm^2 housing... That's what the big boys run... Muahahah

lovesmysuby04

iTrader: (4)

Very nice turbo

namitherussian

very interested in this as well

EndlessWaltz RS

iTrader: (4)

LoL I agree, but some of us dont want to wait a day for boost to hit Just out of curiosity, how does the TD06SH-25G compare to a GT30R...say a GT307R, 77mm, .56 trim? I havent heard, did you finally get your Spec C steup running well? If so, details please, or at least point me to the thread!

gruppe-s

iTrader: (22)

I would say that the TD05-20G on a 2.0L would generally hit full boost (on CA pump gas, ~20 PSI) around 36-3700 RPM and full torque by 3800 RPM. This would be an awesome turbo on your V7 and comes highly recommended by Mike too. We haven't tested the TD06-18G on anything yet but from looking at the specs and other people's testing, we think it'd be a very similar turbo. Since you have the extra rev range, the 20G makes more sense for you I think.

Thanks,

Geoff

Imprezer

iTrader: (9)

On my regular stock EJ20 I hit full boost at 5300PRM. Kinda late, but i don't mind. The payoff is great. I am yet to see another car to hit 312WHP on pump gas at Shiv's dyno. Then I tried in on a built 2.4L with AVCS heads with AVCS no hooked up. Spool up was complete by 4800PRM. Now, I have Spec C engine. Let me just tell you that it spools up very nice.

For your amusement, here is a pic of my T67 (25G) vs. BOZZ Speed XP+5 (modded VF34).

Haha...

EndlessWaltz RS

iTrader: (4)

Damn that thing is so much bigger...lol

namitherussian

pizdets, thats a big turbo