[Closed] Borg Warner Efr Series Turbos

[reaper]

haha I only have an 8374 1.05 rear but either way I think im going to have to turf ac to get it in the spot I want it

[Piggaz]

9180 and AC don't belong in the same post lol.

[Sub Boy32]

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 December 13, 2013 by Sub Boy32

[White GTS-T]

EFR7163 mixed flow turbine wheel on the left EFR6258 radial flow turbine wheel on the right.

[Dale FZ1]

Difficult to tell, but is the difference in the relative overall height of the impeller?

[reaper]

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

[White GTS-T]

Difficult to tell, but is the difference in the relative overall height of the impeller?

Note the different tip shapes

[Sub Boy32]

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.

[White GTS-T]

Link to build thread?

[Sub Boy32]

Link to build thread?[/size]

Get your self some popcorn....it's over 50 pages long! Haha!

http://www.gtr.co.uk/forum/154737-sub-boys-r32-gt-r-then-now.html

[White GTS-T]

*Grabs popcorn

[White GTS-T]

God damn, i'm only a fifth of the way through, and to think, I had planned to do things today...So good.

Edited December 14, 2013 by White GTS-T

[BakemonoRicer]

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]

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]

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]

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 December 17, 2013 by bradsm87

[BakemonoRicer]

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]

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]

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.

[M@&k]

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?