# New Cosworth / Borg Warner Turbos - EFR Series **URL:** \ **Category:** NYSpeed Automotive\ **Created:** [October 20, 2010, 11:02am UTC](https://forums.speedlife.net/t/new-cosworth-borg-warner-turbos-efr-series/161723 "2010-10-20T11:02:38Z")\ **Posts on this page:** 6\ **Page:** 1
**Author:** ![Onyx\_Z32](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/onyx_z32/32/7581_2.png) [@Onyx\_Z32](https://forums.speedlife.net/u/Onyx_Z32)\ **Post date:** [October 20, 2010, 11:02am UTC](https://forums.speedlife.net/t/new-cosworth-borg-warner-turbos-efr-series/161723/1 "2010-10-20T11:02:38Z")
Interesting, but is it a big deal? Some features: - Turbine inertia cut by 50% dramatically improving turbo response - Integrated recirculation valves - Integrated boost control solenoids - Crazy mounting angles More info here: [http://www.cosworthusa.com/news/article.asp?idpage=57](http://www.cosworthusa.com/news/article.asp?idpage=57) ![http://www.cosworthusa.com/store/pc/catalog/bwturbolowsmall.jpg](http://www.cosworthusa.com/store/pc/catalog/bwturbolowsmall.jpg) ![http://www.cosworthusa.com/store/pc/catalog/bwturboturblow500.jpg](http://www.cosworthusa.com/store/pc/catalog/bwturboturblow500.jpg) ---
**Author:** ![Carnut](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/carnut/32/7590_2.png) [@Carnut](https://forums.speedlife.net/u/Carnut)\ **Post date:** [October 20, 2010, 11:35am UTC](https://forums.speedlife.net/t/new-cosworth-borg-warner-turbos-efr-series/161723/2 "2010-10-20T11:35:58Z")
I’m curious why they have the internal wastegate and an external wastegate in use during their test… ---
**Author:** ![focusinprogress](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/focusinprogress/32/7227_2.png) [@focusinprogress](https://forums.speedlife.net/u/focusinprogress)\ **Post date:** [October 20, 2010, 12:10pm UTC](https://forums.speedlife.net/t/new-cosworth-borg-warner-turbos-efr-series/161723/3 "2010-10-20T12:10:58Z")
thats a sick looking turbo, but don has a point…whats going on there? ---
**Author:** ![Inn-Tune](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/inn-tune/32/7588_2.png) [@Inn-Tune](https://forums.speedlife.net/u/Inn-Tune)\ **Post date:** [October 20, 2010, 12:11pm UTC](https://forums.speedlife.net/t/new-cosworth-borg-warner-turbos-efr-series/161723/4 "2010-10-20T12:11:51Z")
> [@Carnut](#): > > I’m curious why they have the internal wastegate and an external wastegate in use during their test… I was wondering the same thing. I’m thinking it’s probably just part of their standard test rig and they’re not using it during this test, but it’s hard to say. I’d guess that the inlet to the wastegate would have glowed all the way up to the gate if the gate was open and exhaust was flowing through it. I called on this and they’re not releasing info or pricing at the moment. I’m sure I’ll get the scoop at SEMA in 2 weeks. ---
**Author:** ![Spam16v](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/spam16v/32/5287_2.png) [@Spam16v](https://forums.speedlife.net/u/Spam16v)\ **Post date:** [October 20, 2010, 3:33pm UTC](https://forums.speedlife.net/t/new-cosworth-borg-warner-turbos-efr-series/161723/5 "2010-10-20T15:33:36Z")
seems logical, since there were probably half a dozen proto turbos and various housings bolted on that rig, some with gates, and some without I’m sure. ---
**Author:** ![Inn-Tune](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/inn-tune/32/7588_2.png) [@Inn-Tune](https://forums.speedlife.net/u/Inn-Tune)\ **Post date:** [October 20, 2010, 3:43pm UTC](https://forums.speedlife.net/t/new-cosworth-borg-warner-turbos-efr-series/161723/6 "2010-10-20T15:43:27Z")
I also noticed a few companies are saying they developed these turbos with BW so who knows how much involvement each of them had.