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[Closed] Borg Warner Efr Series Turbos

Lithium

By Lithium,
in Engines & Forced Induction

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Lithium
Lithium

Hi all!   I've not really been active on this forum for some time and although I lurk in to read bits and pieces of interest I don't really think of this as a forum I'm part of but I once was and I di

R32 TT
R32 TT

Haha - yeah it could use some more boost Simon..  I'm sorry I've not put up Motec logs in the past for those who've wanted to see. Back at the time I did a bit of comparing because I did more or

Full-Race Geoff
Full-Race Geoff

mr skidz, your posts are coming off as trolling at this point.  do EFR people go into precision threads and talk about how great their mates setup is, but wont give any details??  whilst complaining t

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Sub Boy32 Rising Star

Sub Boy32

Posted
Posted (edited)

I personally think that I would prefer an EFR8374 on my car. In saying that you couldn't really ask much more from the PTE 6262, 710rwhp is crazy and response is very good.

The main thing that turned me off the EFR was the physical size and lack of housing options in external gate, in fact if someone can show me one will fit between my strut tower and my motor, plus a T4 divided in a 0.8 rear and I'll give it a go

I have my 8374 fitting between the struts in my R32, and it has the T4 divided .92A/R IWG housing so it's even fussier to fit. Yeah it's tight, but no issues. You wouldn't want anything smaller than the .92a/r on an RB26 or RB30.....it's borderline too small on mine, I could still fit the A/C pump back in if I wanted......but I'm reserving the space for a dry sump pump one day :-) Edited by Sub Boy32
reaper Experienced

reaper

Posted
Posted

I have my 8374 fitting between the struts in my R32, and it has the T4 divided .92A/R IWG housing so it's even fussier to fit. Yeah it's tight, but no issues. You wouldn't want anything smaller than the .92a/r on an RB26 or RB30.....it's borderline too small on mine, I could still fit the A/C pump back in if I wanted......but I'm reserving the space for a dry sump pump one day :-)

You arent using a full race manifold then I guess? My full race manifold put the turbo quite a fair bit forward

Sub Boy32 Rising Star

Sub Boy32

Posted
Posted

You arent using a full race manifold then I guess? My full race manifold put the turbo quite a fair bit forward

No, I had Sinco Customs make me one, it's similar to their TO4Z manifold, but has been lowered to suit the extra height of the RB30 and the size of the EFR.

TurboFit1.jpg

TurboFit2.jpg

BakemonoRicer Grand Master

BakemonoRicer

Posted
Posted

With the EFR7064....in T4 TS 1.05 A/R configuration

Would this be enough for insane response, broad power band and 8000rpm redline on a 2.0L or 2.2L SR20 (with correct cam selection) while pushing over 400rwhp?

My goals are to find a turbo which will support my goals of a very fast street car (in all aspects) which will also be brutal on the circuit...

GTScotT Grand Master

GTScotT

Posted
Posted

With the EFR7064....in T4 TS 1.05 A/R configuration

Would this be enough for insane response, broad power band and 8000rpm redline on a 2.0L or 2.2L SR20 (with correct cam selection) while pushing over 400rwhp?

My goals are to find a turbo which will support my goals of a very fast street car (in all aspects) which will also be brutal on the circuit...

The newer 7163 should be superior, both will support more than 400whp on E85.

BakemonoRicer Grand Master

BakemonoRicer

Posted
Posted

Want to keep it on 98 octane....

I like the idea of dual external wastegate T4 twin scroll.... which the 7163 doesn't have.

The 7064 seems (t4 ts 1.05/ar ext wastegate) seems as though itll have more top end potential whilst retaining savage response...

bradsm87 Proficient

bradsm87

Posted
Posted (edited)

With the EFR7064....in T4 TS 1.05 A/R configuration

Would this be enough for insane response, broad power band and 8000rpm redline on a 2.0L or 2.2L SR20 (with correct cam selection) while pushing over 400rwhp?

My goals are to find a turbo which will support my goals of a very fast street car (in all aspects) which will also be brutal on the circuit...

The 1.05 is prob a bit big. The .92 easily,easily will achieve that goal. I have a 2.15L SR20 with a 7064 .92 and Poncams (tiny) and mine made 258rwkw on about 16psi with very,very conservative timing. It goes a lot harder now but haven't dynoed it since. Still can't afford to take it in for another run. With 24-26psi and 260 degree Procams, it'd go off it's head (Prob 350 odd rwkw. My injectors/gearbox/clutch would not support that level of power).

Edited by bradsm87
BakemonoRicer Grand Master

BakemonoRicer

Posted
Posted

Awesome to hear Brad....

What RPM are you achieving full boost and what is the transient/throttle response like? Is the acceleration fairly savage as is and what is the car like for spirited driving?

I hear the EFR's well and truly come to life when high boost is pushed into them.

bradsm87 Proficient

bradsm87

Posted
Posted

Full boost at 3300 if loaded up in a high gear from low RPM. Transient throttle at anything above 3700 is insanely, insanely quick on to boost. Comes on gradually and very controllable if loading up from low rpm. If u hit the throttle at 4500-ish, u gotta be careful becomes on very fast and hard.

M@&k Community Regular

M@&k

Posted
Posted

Been wondering if it's physically possible to fit a 7163 onto a RB25 stock manifold.

I make out that a GT3071 is about 150mm from face of flange to furthest point on compressor housing. The 6758 (which I understand is outline identical to 7163) is about 165~170mm in T25 form. Possibly even bigger in TS T4 format. Given you would need a spacer to fit the 7163 (to convert to T3), it's probably 20mm or so closer to shock tower...

Anyone know how much extra room there is in R33 GTST engine bay with GT3071 / GT3076? Would one of these EFR turbos fit?

Pics below of references. I made pretty agricultural measurements assuming the pics are to scale.

post-83859-0-29311700-1387582398_thumb.jpg

post-83859-0-99090700-1387582523_thumb.jpg

M@&k Community Regular

M@&k

Posted
Posted

Also for s#!ts and giggles, I overlaid GT3071, GT3076 and EFR 7163 compressor maps.

Notes:

Efficiency island:

GT 76%

EFR 74%

Speed lines:

GT 120k

EFR 110k & 130k

The 7163 looks pretty damn impressive. Thoughts on how spool time would be compared with GT3071?

post-83859-0-92399000-1387583072_thumb.png

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