I've been asking by private message to a few people about wheel size suitability and exhaust housing size. 94awd and 240z I thank both of you guys for the conversation and data. We are seeking to diverge from stock location due to lead time and chra's availability with ots units.

goal:

• take advantage of t/s
• peak torque around 4500 +-
• more area under the curve on 93 than a single scroll ball bearing red. (Probably less than 30psi boost)
• Greater headroom for power provided better fuel become available
• switch to common Garrett chra's
  
  some hard information
  
  s2 cams and springs (mivec)
  Skunk 2 intake ported by reputable shop
  br 2.4l 9.0:1
  Jmfab 3.8" garret core ic
  
  that's what we have to work with. A cam change, is not out of the question, but as reasonable as possible, only cams or intake may be changed. Not both, as both would require new parts sourced including a stock intake. With that said, prefer to change none.
  
  things I have considered
  
  gtx3576r
  gtx3582r
  
  in varying t/s configurations
  
  I've done a ton of searching, but cannot make a clear conclusion. We are no stranger to compromise, and the goals are subject to reality checks..

post #40 here has me thinking about how, newer technology could make this even better.

https://www.evolutionm.net/forums/evo-dyno-tuning-results/385251-35r-dyno-thread.html

 

my answer is still the same. FIND a TS red. not that hard. or you can go dominator 2.0 or 3.0. TS bolt on and still available. putting together a TS garret kit is far more involved and time consuming. and a TS garret turbo is gonna spool a lot slower than a mistubishi TS housing on any turbo. there are three series of exhaust housing options when you start talking TS garret. the original .78 and 1.06. then there are the newer redesigned housings t3, t4 and vband inlet. with a slew of sizes too pointless to go over because there is virtually nil testing information on ANY of them. better to bite the bullet and go with $ EFR.

you research is so far off for your goal. IMHO. garret GTX3582R is a good bit bigger than FP black. thats an 800whp snail. the 3576 will likley outpower an FP black. and you are hoping to spool them faster than a single scroll red. you could easily end up spooling slower the way you are talking.

 

Find a twinscroll red. It will meet your goals.


Also, I would think your 2.4 should be making good torque by 4500, even on a single scroll red. My 2.0L with twin scroll is basically on the torque plateau at 4500. The 400cc of extra displacement should be able to do that even with the single scroll housing.
This thread is a 2.3L with single scroll red. Looks pretty awesome to me. Maybe consider changing your intake manifold.


https://www.evolutionm.net/forums/ev...croll-c16.html

 

I have a Stock location MHI Red and it makes great power ( over 400 ft lbs at 3800) IMO, its one of the most responsive 600whp setups available. Its like the stock turbo but never falls off. Its hard to beat this turbo for street use. You can auto x it ,track or just have a responsive fun daily.

Going from my 2.0 to 2.2 results Back pressure will be an issue above 7000 or so. Your engine being larger it will be worse. It will still be a fun setup but I'd leave it soft up top or avoid that area . Too much backpressure can lead to a few issues. Heat, cylinder not getting clean etc..

Now, If you are going TS T4 I would do it as close to this as possible. I've considered this setup a number of times. Slightly laggier but will make as much power as the GTX 3582R can dish out. The new GTX line is even more powerful.

These results were on a Gen 1 GTX3582R . I would do the 82 over the 76 in a heartbeat. Very small difference in spool up for much lower back pressure and better wheel sizing IMO.

https://www.evolutionm.net/forums/ev...cing-head.html

BTW, your skunk manifold is just fine. I tested an unported one back to back over my stock one and it spooled the SAME, but made 20whp more over 7500. It lost a small amount of response on the street but barely noticeable on the red.

I've got a friend in South America on an ETS T3 TS setup gtx3585R and it makes 20 psi by 4000-4200 on a mivec 2.0 on C16 in 3rd. Its also road raced and the powerband is fine for most tracks using the gearbox.

 

I was going by this.. looked like it was pretty close. And I believe this was on a 2.5l sti

 

You can not compare the EJ25 to a 4g63. The VE on the EJ is so terrible, it's just not even close.

 

Boost vs rpm looks amazing on that build.

I didn't mention in the OP we have mivec. Stock location turbo is not in the future long term.

here's a thread, on 93 that suggests a few hundred rpm could be saved off the roughly 5k rpm torque level simply by being 20% more displacement.

https://www.evolutionm.net/forums/evo-dyno-tuning-results/722963-built-2-0l-fullrace-3582r-ts-s2-93oct-29psi.html

slightly different turbo, but follows the trend(although non mivec)

https://www.evolutionm.net/forums/evo-dyno-tuning-results/640137-shane-s-525whp-twin-scroll-hta3582.html

https://www.evolutionm.net/forums/evo-dyno-tuning-results/696380-2-2l-ts-t4-gtx35r-1-04-s3-s-pump-gas-509whp-english-racing.html

 

To me, the answer is simple: do you want to max out at 600whp or 725whp? The Professional Awesome setup is a 2.2L with the T3 divided 1.01 A/R turbine housing and the GTX3582R.

I would only use the newer T3 divided housings from Garrett. I don't think the older T4 is ni-resist like the newer T3. Plus the newer T3 is has an updated volute design which should be more efficient.

 

700 plus when we have good fuel to use. I'm looking into more information on that housing. I see it at atp, and the ni resist stuff jumps out at you by being clearly different looking.

thanks for the input!

 

A bit of info here:
http://www.motoiq.com/MagazineArticl...--Part-II.aspx

 

Is there plans for reverse rotation t3 divided housings? I see open and v band open. That would make packaging a manifold a bit easier 😃

in reality though there's plenty of good hot parts kits available.