View Poll Results: Should we ban Fae for continuing to talk like moran?
yes
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24
51.06%
yes
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23
48.94%
Voters: 47. You may not vote on this poll
EFR turbo le why u gotta b such a BITCH
#301
![Default](https://www.miataturbo.net/images/icons/icon1.gif)
So EFR6758 from Mike arrived today. It's glorious and me a lot happier than I was expecting. I mean, seriously, it's like the 3rd one I get to play with but damn it's like going on a first date with a supermodel.
Overall, I'm most impressed by the original replacement estimate. Borg Warner said "mid-August" and what do you know, it's still August and I have my replacement. I was told that warranty replacements ship first, so other people *cough* Savington *cough* should be getting their turbonators soon (you know, the ones they paid for in 2011).
Definitely glad I stuck with EFR, despite it being expensive in both time, money and stress. I think it was worth it. Mike in particular was very helpful - world would be a better place if all customer service was like that.
Anyways, pictures.
![](https://www.miataturbo.net/attachments/build-threads-57/53597-soviet-russia-car-build-you-dsc_1383-jpg?dateline=1346388917)
![](https://www.miataturbo.net/attachments/build-threads-57/53635-soviet-russia-car-build-you-dsc_1406-jpg?dateline=1346388932)
More in my build thread - https://www.miataturbo.net/build-thr...12/#post921575
Overall, I'm most impressed by the original replacement estimate. Borg Warner said "mid-August" and what do you know, it's still August and I have my replacement. I was told that warranty replacements ship first, so other people *cough* Savington *cough* should be getting their turbonators soon (you know, the ones they paid for in 2011).
Definitely glad I stuck with EFR, despite it being expensive in both time, money and stress. I think it was worth it. Mike in particular was very helpful - world would be a better place if all customer service was like that.
Anyways, pictures.
More in my build thread - https://www.miataturbo.net/build-thr...12/#post921575
#302
![Default](https://www.miataturbo.net/images/icons/icon1.gif)
While we would love to take all the credit, solving problems like this can only be done with a combined effort. Once BWTS became aware of this issue, it was they that made sure that we all worked together with the sense of urgency required. As Soviet noted, any outstanding warranty issues are to be resolved before new units for sale will be released, but I can say, we won't be long in having this product back on the shelf for sales.
Thank YOU, Leo, for your patience and understanding during the duration of this issue. It is most appreciated. I look forward to the data we discussed.
Thank YOU, Leo, for your patience and understanding during the duration of this issue. It is most appreciated. I look forward to the data we discussed.
#312
Former Vendor
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iTrader: (31)
Join Date: Nov 2006
Location: Sunnyvale, CA
Posts: 15,442
Total Cats: 2,103
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I'm aware. Treadstone makes their own EFR-specific clamps and flanges that are significantly nicer than Borg's own parts.
e: Borg clamp on the left, standard ATP GT 3" clamp on the right.
![](https://www.miataturbo.net/attachments/engine-performance-56/55085-efr-turbo-le-why-u-gotta-b-such-bitch-imag0202.jpg?dateline=1347932849)
Borg clamp on top, standard ATP GT 3" clamp on bottom
e: Borg clamp on the left, standard ATP GT 3" clamp on the right.
![](https://www.miataturbo.net/attachments/engine-performance-56/55085-efr-turbo-le-why-u-gotta-b-such-bitch-imag0202.jpg?dateline=1347932849)
Borg clamp on top, standard ATP GT 3" clamp on bottom
![](https://www.miataturbo.net/attachments/engine-performance-56/55086-efr-turbo-le-why-u-gotta-b-such-bitch-imag0201.jpg?dateline=1347932849)
#313
Elite Member
Thread Starter
iTrader: (2)
Join Date: Jan 2007
Location: Los Angeles, CA
Posts: 8,682
Total Cats: 130
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The only time mine are stuck is when my SS vband female bonds to the iron turbine housing male side. And yes, that is on the turbine outlet. Kroil to the rescue.
#315
![Default](https://www.miataturbo.net/images/icons/icon1.gif)
our clamps are 100% borgwarner OE. If you use anti-seize on the threads (as should be done on all manifold nuts/bolts and all vband surfaces) there is no reason you will have an issue. These are specifically a narrow width to clear the "wastegate tumor", the large diameter traditional vband clamps will hit the housing on the side, so the lower profile fits better and is more compact.
on my personal car ive had the efr downpipe clamp on and off more times than I can count, and havent had to replace it once (i always use anti seize)
#316
Tour de Franzia
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Join Date: Jun 2006
Location: Republic of Dallas
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Use anti-sieze when taking clamps on and off. You need lubrication for such a long shaft.
Geoff already said that, lol. I'll keep this up so I feel like I still provide value to the forum.
Geoff already said that, lol. I'll keep this up so I feel like I still provide value to the forum.
#318
![Default](https://www.miataturbo.net/images/icons/icon1.gif)
It's obvious (to me, at least) that the clamp shown in the initial photo is the O.E. BWTS part.
But, the locking nut is most definitely not, and it's the real root cause here.
To be fair, I work around these parts all day, every day, so goofy details like this are something I'm familiar with.
The 'crimped' all-metal locknut that seems to have caused all of the problem is a design that BWTS doesn't use, period. They use free-running locknuts that use a split design on most U.S.-built product, and, on the EFR Series, they use a free-running 'tall hex' nut that does not have that 'crowned' design. The other obvious giveaway; the "EFR" locknut is a 10mm hex with 1/4"-28 thread, and the one in the photo is a 7/16" hex with a 1/4:-28 thread. Again, I spend far too much time looking at these parts.....
(If anyone needs a side-by-side-by-side comparison photo of these parts, just let me know)
That being said, the photos of the O.E. and aftermarket clamp are correct; the O.E. clamp has a much more narrow 'band' around the clamp, specifically to clear the wastegate port 'lump' on the turbine housing casting. The wider 'band' has a difficult time with this clearance, especially on the B1 housing. This is actually mentioned in the Feature Guide available for free download on the BWTS website.
You can absolutely use the wider 'band' clamps on the non-wastegated housings, with no issue at all, as long as they're designed for the 3.62" o.d. v-flange that BWTS uses, which is fairly standard. But, on the wastegated B1 housings, I suggest sticking with the O.E. clamp.
The O.E. clamp, also, DOES NOT include a locknut when sold as a loose item. It does include a 'tall' free-running locknut when purchased as the hardware kit, part number 179423, but NOBODY buys that kit unless they're installing a Super Core.
The clamp, as a loose part, is part number 59001095225, and we supply the O.E. free-running locknut at no charge when we ship the clamp as a loose part.
I do agree completely with the suggestion of using anti-seize compound on these threads, though. That's wise advice.
But, the locking nut is most definitely not, and it's the real root cause here.
To be fair, I work around these parts all day, every day, so goofy details like this are something I'm familiar with.
The 'crimped' all-metal locknut that seems to have caused all of the problem is a design that BWTS doesn't use, period. They use free-running locknuts that use a split design on most U.S.-built product, and, on the EFR Series, they use a free-running 'tall hex' nut that does not have that 'crowned' design. The other obvious giveaway; the "EFR" locknut is a 10mm hex with 1/4"-28 thread, and the one in the photo is a 7/16" hex with a 1/4:-28 thread. Again, I spend far too much time looking at these parts.....
(If anyone needs a side-by-side-by-side comparison photo of these parts, just let me know)
That being said, the photos of the O.E. and aftermarket clamp are correct; the O.E. clamp has a much more narrow 'band' around the clamp, specifically to clear the wastegate port 'lump' on the turbine housing casting. The wider 'band' has a difficult time with this clearance, especially on the B1 housing. This is actually mentioned in the Feature Guide available for free download on the BWTS website.
You can absolutely use the wider 'band' clamps on the non-wastegated housings, with no issue at all, as long as they're designed for the 3.62" o.d. v-flange that BWTS uses, which is fairly standard. But, on the wastegated B1 housings, I suggest sticking with the O.E. clamp.
The O.E. clamp, also, DOES NOT include a locknut when sold as a loose item. It does include a 'tall' free-running locknut when purchased as the hardware kit, part number 179423, but NOBODY buys that kit unless they're installing a Super Core.
The clamp, as a loose part, is part number 59001095225, and we supply the O.E. free-running locknut at no charge when we ship the clamp as a loose part.
I do agree completely with the suggestion of using anti-seize compound on these threads, though. That's wise advice.
#319
![Default](https://www.miataturbo.net/images/icons/icon1.gif)
I'm sorry that I missed this; yes, in May of 2011, BWTS replaced the original turbine wheel supplier, and all units produced after that date are equipped with these wheels. At this time, we have not been aware of ANY turbine wheel failures with the new turbine wheels, and that includes a complete season of IndyCar, as well as other, less publicized motorsport applications.
#320
![Default](https://www.miataturbo.net/images/icons/icon1.gif)
I'm taking a failure analysis tech elective this semester for my mechanical engineering degree. I chose to do my final report over this issue so your info is helpful. If the report turns out okay ill post it up. Had some fun with the layering light microscope, scanning electron microscope, Energy-dispersive X-ray spectroscopy, and vickers hardness tester on this one.