OZZYINCALI

iTrader: (4)

Hi,
I know the BW efr turbos are all the rage right now, but I was considering getting an older oil cooled t4 to run on my Rx3. I was wondering if anyone has run a .83 a/r turbine with success? The other options I considered for the older BW turbos are a .88 or .91 a/r. The reason I'm considering the smaller .83 rear is for response and I want to run relatively tame boost (10-14 lbs). As mentioned it's going into a 2000lb Rx3 with a 13B-RE engine with either the power Fc I have or to haltech. Manifold is an SDR manifold that places the turbo behind the headlight.

This is a a street car, not a drag car , thus the emphasis more on driveability not hp numbers. I know guys are going to suggest a bnr or similar, but I'm not interested in them.

Thanks in advance for any real world knowledge.

lastphaseofthis

iTrader: (8)

s200sxe in 7670 in my next turbo in planning. can't comment on the AR, as i too am going with the .84 for response and have to wait and see how well it holds boost.
but the new sxe its like a feature disabled efr, u get no IWG, and no shutter valve, but you still can have it speed sensored... and im hoping to see an EFR turbine housing for the 7670 .. used somewhere... to add IWG to the SXE.

OZZYINCALI

iTrader: (4)

Lastphaseofthis, it sounds like the turbo I'm looking at is a bit of a dinosaur compared to the one your looking at. I couldn't see any BW's equipped with a .84 a/r housing. Are you building a turbo as opposed to buying one assembled? Besides the tech difference our a/r's are pretty close. From what I've heard the smaller a/r's may choke up the gases above 20 psi up high in the rev range. For $600 it seems like a hell of a bang for your buck turbo. Thanks for chiming in., much appreciated.

lastphaseofthis

iTrader: (8)

the s200sxe comes as a super core.. which is the turbo without a turbine housing. so i have to buy buy a turbine housing anyways.. might as well find a used efr turbine housing some a 7670, unless someone can chime in and that not working.. and why


http://www.full-race.com/store/turbo...xe-7670-1.html

also its .83.. my bad

MjhRotor

iTrader: (1)

I've been curious about the lack of internal gates on the sxe line as well. The sxe 7670 would have been top of my list if it came internally gated.

As awesome as the efr line is I can see why people don't want to drop 2k on the turbo alone.

2Lucky2tha7

iTrader: (3)

Here's a selection of 4 turbine housings available in the t4 design for the s200 (scroll down the page). Free shipping too:
BorgWarner AirWerks S200SX-E 52/57mm 300-650 HP Super Core Turbo Assembly | BorgWarner
I'm essentially in the same boat as ozzyincali, but I'm on the fence about this turbo. I do want to mention though that Elliott at Turblown suggested that if you do use a s200sxe on a rotary application, that a larger turbine housing should be used - a 1.00 housing. Due to higher backpressure from the smaller turbine wheel. And one might experience choking at high rpms - over 7k (?) or so.

OZZYINCALI

iTrader: (4)

I ended up going with an S300 60mm with a divided .91 a/r. I figured the .83 a/r would have trouble with back pressure. The .91 seems like a compromise between response and high rpm. I'm a way off getting it on my engine, but I'll make sure to post my findings.

2Lucky2tha7

iTrader: (3)

Sounds great! Should be an awesome setup

BLUE TII

iTrader: (9)

Besides the tech difference our a/r's are pretty close. From what I've heard the smaller a/r's may choke up the gases above 20 psi up high in the rev range.

Well, I had the EFR 7670 with 1.06AR T4 EWG exhaust housing and the compressor just can't flow enough to make more than 20psi at the horsepower peak. After hp peak the boost went back up again a bit to redline.

64lbs/min is only enough flow for ~450rwhp on a rotary after all. If you can do that hp at 20psi you won't be getting any more boost out of the compressor.

Nateness

iTrader: (7)

I'm running this exact supercore and turbine housing combination. Tuning finished last week:

https://www.instagram.com/p/BEE8Kecs...=itsgaragelife

lastphaseofthis

iTrader: (8)

yeah not signing up.. post dynos outside of gram?

rotaryfreak3

I don't have an Instagram account and I can see the pics just fine.

Flash

iTrader: (2)

So Nateness made 455hp at 20 PSI on the 60mm S300. The dyno pics are cropped to small to see... Nate can you comment on how much HP/tq you made at 15 PSI? How's it to drive?

Nateness

iTrader: (7)

Its a 62mm SXE 300. I recall that we made ~350 WHP at around 10 to 12 PSI. The car is ridiculously fast at 455 WHP.

Flash

iTrader: (2)

Thanks for posting back. So tempting.

rowtareh?

iTrader: (1)

Stock ports on the RE?