BorgWarner's EFR series is targeted to produce the fastest response/spool possible from a given turbo size. Next week I will start a new thread on them since i will finally be able to start publicly posting about the technology and innovative features that allow this to happen.

R/T Ernie - There is one specific twinscroll variation i believe would be a great fit for your friend's E36 M3. Psycho response, and easily capable of the power level he is looking for. Also, this particular turbo offers some features that lend themselves very nicely to the E36 engine bay which does not allow space for a big tubular manifold, wastegates, etc

 

 

We were running the 362 with the .85 divided T3 housing. Here's a link to the dyno graph.

The new BWs have me intrigued, I'm just starting a new build on another DSM and I may have to give one a shot.

 

I followed a bit on DSMLink about it IIRC. At any rate, do you think running the divided .85 hinders flow in a non divided housing? The .70 isn't really cutting it anymore I don't think... FWIW, your car is pushing the setup I'm working on haha. It's my friend's evo9 and when I gave him an RPM to RPM comparison of your car to his he decided it was time to step up his game . Very nicely done for you.

However.. maybe the key is waiting for the EFR and not looking to source a new turbine housing...

 

Thanks Geoff. I'll have Matt contact you come Early November.

 

Cool. Tell em don't forget about making some "small" single scroll a/r's available for people who want to get their business done before 7500 rpm.

 

That's something that Holset has been doing.
Endless had a promo articles about that.

Funny how all this technology comes from diesel world

 

we think Series EFR turbos will be worth the wait

EFR turbos will be initially released with a few different turbine housing options, and more to follow in 2011



The EFR technology was designed from the ground up, for high performance spark ignition engines. *nothing* carried over from the diesel world. Im not sure what youre referring to - but Holset never did this.

 

cant wait to see the new stuff Geoff

 

I'll just say, Geoff has got the interest up.

Will it be hype or will it be the new standard?

That's not meant to be derogatory, as I believe what you may come up with might just be the new standard. If it is, maybe some of the other manufacturers will jump on board and give us something actually targeted at our market from the blue print instead of adapting 15 year old technology over to a new market.

Or maybe they will make 15 year old race car technology (TR30R) affordable???

 

Hi Geoff,

Im going to be running a 2.1 motor ported head etc etc the evo is going to be used as a track car.

What BW turbo would you suggest to use that makes good midrange, top end yet doesnt sacrifice to much lag.



Kurt

 

Considering the BW turbos out there right currently, my advice for a track car is the S300SX 84-75 .91 a/r is about the biggest turbo I would use and still maintain good circuit manners and be forgiving to drive. Scott at Insight in australia ran our twinscroll kit w/ 83-75 1.00 a/r this year and loves it, but now wants to get a bit more top end (he is completely happy with the spool). He is trying out the 84-75 .91 a/r next.

sorry they arent up on our website yet, just got them in

 

Thanks for the reply geoff.

I know scott @ insight very well. He has tuned my car before and many others. i appreciate the advice geoff and will be contacting you soon.

 

I think he just meant that holsett turbos spool very fast for their size. As evidence I have seen HX35 hit 30psi at 2900rpm. Would have to look up specs again but i am positive it was not twin scroll. Dont remember if it was 2.3 or 2.0 . But his is a 60lb/min wheel. 500whp is made with ease on average setups. The setup was blowing away a TS FP red setup in spool department. all from a 200$ e-bay turbo.

 

A 500 HP capable turbo hitting 30 psi at 2900 RPM...

Holsets (or any other turbo for that matter) aren't magic. The largest leap in improvements in turbo design amount to about 5% total efficiency increases over the past 30 years. I find this claim very hard to believe. Please provide proof if you would like that claim to be taken even the slightest bit of seriousness.