[Closed] Borg Warner Efr Series Turbos

[BakemonoRicer]

word on the street is that borg warner have started making these turbos with investment cast housings again

[BoostdR]

Do you mean non sand casted stainless, like original

[BoostdR]

http://youtu.be/J06nj5-B_AE

[Ryno]

Wow... I've been considering upgrading to the 7163 based on some of the info found online.

But as it now may even be more responsive in variable twin scroll, it looks like I'll be waiting for some results of this new turbo.

[sucram]

Doubt it will be amazing. The s4 rx7 had this, made no real difference on stock to to4s internals.

[Ryno]

This isn't really new technology, as it's very similar in concept to a quick spool valve...

http://www.enginebasics.com/Advanced%20Engine%20Tuning/Quick%20Spool%20Valve%20Test.html

But being incorporated into the housing it should be an improvement on the quick spool valve due to less turbulence in the exhaust flow.

Hopefully it's released soon so we can see some data.

[Full-Race Geoff]

updated dynojet result from our R34 GTR with Twin EFR6258 0.64 a/r 2.6L RB26:

Hi Geoff,

I definitely prefer the single over the double so most likely will get the 8374/0.92 IWG. Like the simplicity.

1 question Geoff, do you do a downpipe for that turbo to go to a standard position Cat ( r33 gtr) obviously using your manifold.

Do all my own installations at home but not so good at making downpipes. that would be cool if that is possible.

Cheers Mike

Hi Mike, yes its no problem to supply the downpipe for our single turbo RB setups. we have a dedicated GTR front cut specifically for test fits and mockups like this. email me directly [email protected] and I can help get this sorted for you

Can you provide a v-band EFR turbo already modded to T3? Which in your opinion is a better replacement for the HKS GT-RS, the 6758 or the 7163? I don't want a less responsive turbo, but the 6758 doesn't look like that much more power than the GT-RS.

Hi Ryno, yes we can convert the vband EFR turbo to a T3 inlet. This is a special order only but we can do it. here is a photo:

Hi Geoff, Have you had any results with the EFR 9174 hybrids? i've read the spool performance is only 50-100rpm down on a 8374 but your compressor efficiency moves up the revs a fair bit.

hi, the EFR9174 is an interesting turbo. BorgWarner has just released this 9174 combination for 2016 and is the only large B2 Frame EFR with the lightweight alloy bearing housing. It spools very well (similar to 8374) and has great topend (close to 9180). It is also capable of 125k rpm shaft speed (whereas 9180 is only 116k rpm). We have these in stock now, very good turbocharger when the engine can gobble up the airflow. I am planning to put this on my RB26 next

word on the street is that borg warner have started making these turbos with investment cast housings again

correct, been that way about 14 months now

lastly, our year-end blowout sale is going on now until Dec 31. anyone looking to pick up a manifold or kit at a discount this is a great time to do so!

Edited December 22, 2015 by Full-Race Geoff

[Ryno]

Geoff, do you have any idea when the variable twin scroll will hit the streets?

And what housings it will be available in?

[etang789]

Geoff, do you have any idea when the variable twin scroll will hit the streets?

And what housings it will be available in?

If there would be EFR variable twin scroll turbo on a RB26 that would be something crazy! may be 800hp with stock spool!

[Full-Race Geoff]

Geoff, do you have any idea when the variable twin scroll will hit the streets?

And what housings it will be available in?

The A/R selected for these initial prototypes was a direct match to the existing housings - for the B1 frame 7163 it is 0.80 a/r and for the B2 frame it is 0.92 a/r. This housing design is very much in it's infancy of the development process. Based on a combination of testing and other competing technologies it's unlikely to hit the streets anytime soon. Beyond that - actually fitting this turbo to any engine is serious work. Completely new manifold and downpipe design required from any other existing turbo or any other EFR

If there would be EFR variable twin scroll turbo on a RB26 that would be something crazy! may be 800hp with stock spool!

the 6258 twins with 0.64 a/r and a stiff actuator are not far off from stock spool and can make >800hp

[etang789]

the 6258 twins with 0.64 a/r and a stiff actuator are not far off from stock spool and can make >800hp

Is this number on E85?

[sucram]

No doubt the twin 6258 spools well for an 800 hp set up, but if youre comparing it to the dog shit 100% stock car that is lazy below 4k rpm its sort of unfair.

An rb26 that has stock turbos can build 5psi no prob at 2k rpm when basic mods are done. Mine would toot around in 5th grear with 255/35/18's at 60kph. 6258 are atleast 100hp each more and with runners that are not optimal for low power/rpm/boost tootleing around. No way would it have factory type drivability which is of concern for most who like in a major metro city in australia which does not have the open type roads America has.

[MotHot]

So what kind of EGT are you guys getting on your EFRs?

Trying to find out what would be acceptable in the long run.

But so far no "precise" values to be found?

Reason I'm asking is, my PTP turbo blanket is pretty much done after only ~5000km (may be ~100km on track/hard driving).

[Full-Race Geoff]

maximum EGT should not ever exceed 950C / 1742F on an EFR turbo

[Piggaz]

Where is that taken from, Geoff?

A sensor in the collector?

[MotHot]

maximum EGT should not ever exceed 950C / 1742F on an EFR turbo

Thanks.

[sneakey pete]

Where is that taken from, Geoff?

A sensor in the collector?

That'd be logical, max heat is max you want into the turbo, so thats measuring it as close as the turbo inlet as possible. Not sure how much the temp would drop through the runners, but i doubt it'd be much so perhaps wouldn't matter much where you measured it?

[Full-Race Geoff]

as measured in the turbine inlet. the end of the collector or the turbine housing is ideal to take measurements

[NOCTIS]

Hi Geoff,

Loving the sound of these turbos.

Just a quick query on what you would recommend for my build.

nitto RB32/26 currently running -5's on E85. Making 580hp, full boost under 4.3k or something.

Would love to be making 750hp whilst maintaining a similar level of response if possible. More than happy to make the switch to single if need be.

Thanks in advance!

[Full-Race Geoff]

Hi Geoff,

Loving the sound of these turbos.

Just a quick query on what you would recommend for my build.

nitto RB32/26 currently running -5's on E85. Making 580hp, full boost under 4.3k or something.

Would love to be making 750hp whilst maintaining a similar level of response if possible. More than happy to make the switch to single if need be.

Thanks in advance!

Noctis - when a tall RB30 block is used, I suggest twin EFR6758 (or twin EFR7163 depending on fuel and boost target). The twin EFR setups are not for everyone - there is more piping/lines/two turbos ... twin EFRs fit better than a large single in these cars - and for a responsive 750hp there is nothing that can touch this. We make the downpipes and charge pipe so this is a bolton affair to replace the existing -5s

Edited January 21, 2016 by Full-Race Geoff