EFR Black series

Oct 27, 2016
411
Similar spool but way more power! The compressor map is a lot wider then the 8374/9180
If you look closely that is because the actual Inducer MM of the compressor wheel has changed. Juts like any other turbo, make a wheel bigger the map will move to the right, thus extending the map and flow of the turbo. Its a ~74mm inducer which is HUGE for our 3.0L I6.
 

veer90

Lieutenant
Nov 16, 2016
1,000
West Nyack, NY
Did a quick and dirty overlay, idk they look pretty similar to me.

The 8474 seems to have a better surge line and the 9180 is able to hit higher pressures it looks like, but max flow is the same.

9180 vs 8474.PNG
 

Abacus38

Lieutenant
Nov 2, 2016
638
Tampa/Orlando, FL
Did a quick and dirty overlay, idk they look pretty similar to me.

The 8474 seems to have a better surge line and the 9180 is able to hit higher pressures it looks like, but max flow is the same.

View attachment 22509
Peak efficiency is better on the 9180 @ 77% while the 8474 is @ 75%. Looks like they traded peak efficiency for surge protection. Our motors are big enough so we shouldn’t have to worry about surging.
 
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island road

Corporal
Nov 21, 2016
129
Boston
Here is some more detailed info that I posted on the linked thread that's related and also has overlays from BW.

https://bmw.spoolstreet.com/threads/gtx3584rs-vs-efr9180.4493/#post-63597



This past SEMA Borg Warner mentioned they are finally going to release what was past considered "Black Series" with the EFR 8474, 9274 and 9280. The compressor wheels will be anodized black to differentiate between existing EFR Series.

9280 vs. 9180 = Same 91mm Exducer, but 9280 has 74mm Inducer and 9180 has 68mm Inducer.
9274 vs. 9174 = Same 91mm Exducer, but 9274 has 74mm Inducer and 9174 has 68mm Inducer.
8474 vs. 8374 = Same 84mm Exducer, but 8474 has 68mm Inducer and 8374 has 62mm Inducer.

Here are some release notes - some shops are already starting to receive the turbos.

https://www.borgwarner.com/newsroom...ower-capabilities-of-efr-series-turbochargers

As you are looking at the 9180 below are some overlays.

Compressor Map Comparison - with a few others thrown in for good measure for others that are interested.


View attachment 21424
View attachment 21425
View attachment 21426
 

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