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Hardtopper
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Discussion Starter · #1 ·
Here is the aftermath from me raping an EFR6258 with my camera.

The EFR series is BorgWarner's latest creation which focuses on all the key ingredients that make a great performance turbocharger without sacrificing durability.

The following turbo is an internally wastegated EFR 6258 with a .64 A/R T25 turbine housing. Great for those of you wanting to run twins on your Supras.






I decided to take some detailed shots which focuses on the new EFR best features.

Let's start off with the Forged Milled Compressor Wheel - these are fully milled from forged aluminum, not your typical bar-stock.





Speed sensor mounting provisions on the compressor housing



Built-in Boost Control Solenoid :bigok:





Built-in recirculation valve, covers are available to bypass them if they are not needed.



The adjustable wastegate actuator is mounted onto the back plate to allow the housings to be oriented any way needed for the application.



The compressor outlet is machined in a way that it can be used with both a hose coupler or v-band clamp.



Large wastegate port for higher flow inside of the investment cast stainless turbine housing.







And finally, the fullback Gamma Titanium Aluminide turbine wheel which cuts the inertia by about 50% from your average inconel wheel.



Overall this model would be ideal for use in a twin turbo 2JZ application due to it's size. I will review one of the larger units once I get one.
 

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nice pics Kirk; thanks for sharing.


craig
 

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looks like highest quality design, construction, fabrication so looking forward to actual results on a 2JZ. I cut my T25 flanges off so I might have to look for another set of old HKS manifolds.

Kirk, please polish both housings and post back soon ;)
 

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Hardtopper
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13,043 Posts
Discussion Starter · #10 · (Edited)

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Hardtopper
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13,043 Posts
Discussion Starter · #15 ·
That turbo looks bad ass!!! Looks like the wastegate flap opens right in front of the turbine wheel though. I wonder if it effects anything?
Does not open far enough to get in the way. With as many engineers involved in the EFR project, I doubt they would overlook such a minor detail :lol:
 
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