[Closed] Borg Warner Efr Series Turbos

[bri73y]

good to hear things are working for you john, eager for you to get some seat time and finally experience the turbos at full song. btw did you guys get the ets-pro going

Car survived run in on the dyno today. It made 375kw at 6000rpm off wastegate (16psi), timing at 18degrees and .9lambda so still heaps more to come at final tune. Cams not touched and boost all in below 4000rpm.

Looking very promising.....

ETS Pro all installed but yet to be tested. Will definately let you know how it goes.

[Roy]

That sounds very encouraging!!!!

[bradsm87]

Hopefully with the availability issues gone, we can start to see a lot more results and discussion again.

The Boost Lab received one EFR 7064 .92 last week and I snavelled it up straight away. I should get it in about 2 weeks which is roughly when I should get my block back with the Darton sleeves fitted. If I get the turbo before the block, I'll fit a spare rooted SR20 into the car so I can make an exhaust manifold ASAP. I seriously am sooooo keen to get this thing going. 2.2L, 9.6:1 comp, W2A intercooler across the front of the engine, Poncams, E33 fuel mix and EFR 7064 .92 twin scroll should be a shitload of fun for a street car, even on only 15psi through midrange (will taper boost upwards as RPM increases to hold the torque curve dead flat to at least 6000).

[black bnr32]

http://forums.bimmerforums.com/forum/showthread.php?t=1919765

[SimonR32]

Surely a fake?!? Mind you didn't they have problems with the original casting company? Maybe this is the quality of the new guys?

Edited November 18, 2012 by SimonR32

[GTScotT]

That is really off putting hey..

Seems to me like the delays may have been surrounding the turbine housing production and may have even been the cause of those turbine wheel failures. This new 'ugly duckling' housing might be from a more reliable source but at the cost of glamour.

Thats just me guessing though, my 2c worth anyway.

[infamous_t]

Clearly something dodge going on there.

TS housings were only available in very low numbers, but open scroll were freely available in most sizes...

I reckon someone got there hands on a TS housing and sent it into the chinese photocopier to fill a hole ion the market!

Either that or it was a genuine housing that wasn't supposed to be sold, at least at full retail (ie development version or QA fail etc)

Chris over in NZ got his 8374 TS 6 months ago (new manufacturer batch) and the quality was perfect as expected...

[bradsm87]

That last pic is a 1.05 which is a different housing that's going to be a lot easier to cast.If BorgWarner come out and state that the manky housings are the only way they can reliably make the shape of the .92, I'd be happy enough with it and just tidy up the inside with a Dremel. Deep down inside, I'm really hoping mine doesn't arrive like that though.

[bigmikespec]

That last pic is a 1.05 .

No it is not.

[bradsm87]

No it is not.

The one by infamous_t ???

[GTScotT]

three word reply

[infamous_t]

That last pic is a 1.05 which is a different housing that's going to be a lot easier to cast.If BorgWarner come out and state that the manky housings are the only way they can reliably make the shape of the .92, I'd be happy enough with it and just tidy up the inside with a Dremel. Deep down inside, I'm really hoping mine doesn't arrive like that though.

100% an EFR8374 TS .92

His build here: http://www.gtr.co.uk...r-then-now.html

No EWGs here...

[bradsm87]

Here I was working backwards from page 43 in that build thread. That photo was posted in January. What makes you think it's current revision?

[black bnr32]

read the link i posted. the customer purchased from a bw-recommended vendor. then, he phoned bw:

"I just spoke with Brian Rhinehart of Borg Warner manufacturing directly. Unfortunately, the photos I have posted are of a genuine Borg Warner EFR 7670 twin scroll turbo."

look at the bolt holes. waaay off center. terrible.

Edited November 20, 2012 by black bnr32

[SimonR32]

The complexity of the twin scroll, twin waste-gated design had a rejection rate of over 60% at the foundry with investment casting. Borg Warner tried three different suppliers for the investment cast components, all with the same results. As a result, they switched to green-sand casting around May of this year.

I just spoke with Brian Rhinehart of Borg Warner manufacturing directly. Unfortunately, the photos I have posted are of a genuine Borg Warner EFR 7670 twin scroll turbo. This is how all new EFR units will be manufactured until they can significantly improve the rejection rate of the investment cast units. I asked for a timeframe of when they expect to have units available with investment cast turbine housings, but at the moment, they have no idea. If you or someone you know received an early EFR with the investment cast turbine housing, consider yourself/them lucky.

ON THE OTHER HAND, Brian informed me that Borg Warner conducted extensive flow testing of the green-sand cast units and, while they are not as pretty to look at, the results were all well within the margin of error (less than 1%). In other words, the ugly units perform just as well as the pretty, investment cast units.

That being said, I'm still not 100% satisfied with the inside passages of my specific turbine housing. I may return it for an identical unit if they are still in stock, provided I can get some indication that the replacement will have a better finish.

Edited November 20, 2012 by SimonR32

[GTScotT]

WHOA..

Where did that info come from Simon?

[bradsm87]

Bugger. I guess my 7064 is going to look much like that. As soon as I can get my hands on the EFR 7163 with the new 0.80 divided housing, I'll be switching to that anyway. I only chose the .92 because there were no smaller divided options.

It's very frustrating waiting 2 years for a turbo then it arrives and there is another turbo that's pretty much better in every way already announced.

[Lithium]

ON THE OTHER HAND

Wow, selective quoting by first quoter - but still, very very very very VERY disappointed in what BW are doing there. Just when I started warming to the EFR range they are blatantly being crooks, that is disgusting. Understand that they are doing these housings to fill orders, but they REALLY should be telling people (and charging as such) that the product is NOT the investment cast housing version (that is one of the justifications of the pricing and the wait) instead of just supplying them with a nasty surprise.

[bigmikespec]

Here I was working backwards from page 43 in that build thread. That photo was posted in January. What makes you think it's current revision?

It is still current mate, stop spinning rubbish.

[SimonR32]

WHOA..

Where did that info come from Simon?

That beemer forum that was linked last page

It is still current mate, stop spinning rubbish.

Looks like they have changed the casting process now so he is actually right and the current ones are all going to have these new manky housings