[Closed] Borg Warner Efr Series Turbos

[Lithium]

I assume he is talking about the 8374 on a 3litre, as that is where Sub-boy's seems to hit full boost at

[SimonR32]

i think the 7163 is a bit small for a high boost rb26, as it can be overspun. Same with 7670. however they both provide excellent spool and response so if you use a shaft speed sensor to keep things in check you could be very happy with either on an RB26 - just be prepared to taper the boost up top. The 8374 comes on strong around 3300-3400rpm - so it might be bigger than you like, but i really enjoy it on the RB26 (its one of my all time favorite turbo/engine combinations, so much fun to drive). I am putting the 8374 0.92 back on my RB26 in a couple weeks, after i put the 7163 on my evo

Geoff if you get a chance chuck up the graph for the 26 and 8374...

One day when I'm feeling rich I might do the swap from my 6262

[cobrAA]

Geoff if you get a chance chuck up the graph for the 26 and 8374...

One day when I'm feeling rich I might do the swap from my 6262

I second lol !! However, my next purchase is planned within the month ( depending if my turbos are actually shot or not)

[cobrAA]

So which one should provide a better spool the IWG 0.92 or the EWG 1.05 ? or wastegate don't really affect spool up, only boost control ?

[Piggaz]

With the internal gated single, say an 8374, do you just use the external gated twin scroll manifold and just block the two gate runners off? I can't see a internally gated option for the manifold.

[Roy]

The other day i saw the McLarens V8 engines they are using in their MP4 & P1. Intersting to note the turbos look a hell of a lot like internal gate EFR turbos hanging off the manifolds

[Lithium]

The other day i saw the McLarens V8 engines they are using in their MP4 & P1. Intersting to note the turbos look a hell of a lot like internal gate EFR turbos hanging off the manifolds

Funny thing is I have a pic in a book at home of a Pontiac Solstice turbo setup (I think?) which featured a twin scroll internally gated turbo with an integrated BOV in the compressor cover (I got the book before EFRs existed)... hard to say what else uses them, or similar ideas, but I found it really interesting.

[Tonba]

^ Are those factory turbos manufactured by Borg Warner by any chance?

**EDIT**

After a little bit of research, the turbos for the McLaren M838T engine are sourced from MHI

Edited July 8, 2014 by Tonba

[Lithium]

I can't remember specifically, I just recall the EFRs looking familiar when I first saw them and then later remembering how interesting the ones in the book looked. When I get home tonight I'll try and remember to look it up and maybe post a pic

[Tonba]

^ I wonder why we haven't seen any aftermarket VGT turbos yet?

[Lithium]

I don't know of any reliable OEM ones yet, so I am guessing it's for the same kinds of reasons. The late model Porsches are frequently going back for warranty claims, afaik.

[reaper]

With the internal gated single, say an 8374, do you just use the external gated twin scroll manifold and just block the two gate runners off? I can't see a internally gated option for the manifold.

Full race have an iwg manifold option

http://www.full-race.com/store/efr-turbo-manifolds/nissan-rb26-25-20-det-t-twin-scroll-iwg-efr-turbo-manifold.html

Though id go the 1.05 rear twin ewg option on your car thats the setup I run and I can only imagine with the 2.8L it would be even better

[bigmikespec]

I initially though they were airwerks due to the fact the FMW compressor wheels are apparently the same wheels as EFRs.

But then I saw the pic of what they actually run, which looks to be a custom casting.

So can we buy these goddamn things or what??? Lol... particularly if we can get it with the 1.45A/R turbine housing.

Edited July 21, 2014 by bigmikespec

[Lithium]

Don't think you can get those comp housings, but you can get V-Band exhaust housings now - as far as I know

[bigmikespec]

Yes I know you can buy housing separately, it would be nice if you can just buy one direct from BW or even from a Indy team???

[Full-Race Geoff]

So can we buy these goddamn things or what??? Lol... particularly if we can get it with the 1.45A/R turbine housing.

EFR 9180 1.05 a/r is in stock, the 1.45 a/r starts shipping in 1-2 weeks.. making progress

With the internal gated single, say an 8374, do you just use the external gated twin scroll manifold and just block the two gate runners off? I can't see a internally gated option for the manifold.

you can block the WG ports off or use a non-wastegated manifold. here is our RB26 IWG efr turbo manifold:

Full race have an iwg manifold option

http://www.full-race.com/store/efr-turbo-manifolds/nissan-rb26-25-20-det-t-twin-scroll-iwg-efr-turbo-manifold.html

Though id go the 1.05 rear twin ewg option on your car thats the setup I run and I can only imagine with the 2.8L it would be even better

the twin wastegates are the call for maximum performance. I hope you are happy with the setup!

So which one should provide a better spool the IWG 0.92 or the EWG 1.05 ? or wastegate don't really affect spool up, only boost control ?

the smaller a/r will usually spool the turbo quicker.. as long as the wastegate doesnt crack open prematurely it wont affect spool. The solution is to use a stiff WG spring. turbosmart IWG has been popular lately becuase it uses the same springs as their EWG (up to 3)

I can't remember specifically, I just recall the EFRs looking familiar when I first saw them and then later remembering how interesting the ones in the book looked. When I get home tonight I'll try and remember to look it up and maybe post a pic

i believe BW made the turbos for that saturn skyy/pontiac solstice platform. as well as the cobalt. And the 2011-2012 EcoBoost F150, and 2012+ Focus ST EcoBoost, Fusion, etc.. audi and volvo they all used that style Compressor recirc valve. It works well

Yes I know you can buy housing separately, it would be nice if you can just buy one direct from BW or even from a Indy team???

indy teams now run twin EFR7163 only. there may be some used 9180s floating around, but keep in mind it was not in a ported shroud housing so actually the standard EFR9180 compressor housing will slightly outperform the indy 9180 - given the same turbine housing A/R

Edited July 24, 2014 by Full-Race Geoff

[bigmikespec]

indy teams now run twin EFR7163 only. there may be some used 9180s floating around, but keep in mind it was not in a ported shroud housing so actually the standard EFR9180 compressor housing will slightly outperform the indy 9180 - given the same turbine housing A/R

What is the reason for switching to the twins?

I would have thought the opposite as the surge slots bypass air to avoid surge hence efficiency losses.

[Piggaz]

Any plans to bring the mixed flow turbine wheel into other sizes apart from the 7163? If so, what would be the better ass end. The open scroll mixed flow or the twin scroll?

[zebra]

I'm thinking Geoff should sponsor me an internal gate 7163 to see if they bolt up to a 25det exhaust manifold

or better yet a 7670

[Tonba]

Any plans to bring the mixed flow turbine wheel into other sizes apart from the 7163? If so, what would be the better ass end. The open scroll mixed flow or the twin scroll?

Also very interested in this.

Also interested if BW are looking at a 64mm turbo to fit between their 8374 and 9180?