[Closed] Borg Warner Efr Series Turbos

[eron]

I looked into actual 2860RS' (instead of the high flow I had), 2871s, 2876s, 3071s, T518zs, TD05s, TD06s, RX6s, etc etc etc ad nauseum, I now know more about those than I'll ever have the need to, while the 6258 may not be the best 'bang for buck' for most punters, for my dollar, it was the only way to go.

As you go along, can you kindly list items you have bought or modified in order to get it running well?

It would certainly benefit the whole community.

[scandyflick]

Sure thing.

The list so far,

Manifold (not strictly necessary)

Intake pipe

Outlet pipe

Dump pipe

Water fitting on the block (comp cover fouls it, yet to trial any solutions)

Oil drain line

So far that's it. I can't foresee any other issues aside from those. But I'll post them as they come.

[Sidwysracr]

4) The BP ratio should be intake pressure higher than exh pressure, until approx 5500rpm. from that point to redline, it should be 1:1

Geoff,

From reading around maximum is 2.5:1 ex/in pressure ratio. I have checked with the matchbot for both the 6255 and 6258, both exceed your 1:1, ratio. They are 1.6:1 and 1.5:1 pressure ratios, respectively. From talking to several tuners. This is optinum.

Ultimately I been trying to compare them to the GT2860r-5's, and if they fare well I will purchase a pair of EFRs.

I could use help by a dyno chart of either 6255 or 6258, and the boost graph included. This would help my decision matrix.

Thanks,

Joe

Edited July 6, 2011 by Sidwysracr

[GTScotT]

Sure thing.

The list so far,

Manifold (not strictly necessary)

Intake pipe

Outlet pipe

Dump pipe

Water fitting on the block (comp cover fouls it, yet to trial any solutions)

Oil drain line

So far that's it. I can't foresee any other issues aside from those. But I'll post them as they come.

Is your motor built? If not, what is your expectation for things breaking down? Including your said manifold.

I may be running an SR soon and am out of touch with their capabilities.

[scandyflick]

Unopened.

I played with the idea of a simple rebuild while I was waiting, but knowing how things snowball, I decided against it to save my bank account.

Only internal modifications will be a set of BC step 2 cams. I'll likely go back to standard manifold, don't much like the design of the A'pexi.

Aiming for 250 on a nice safe E85 tune. Another 30 or so before I start worrying about the bottom end.

My only concern at this stage is the gearbox. I reckon I'll lunch that well before the motor shows signs of going to the scrap heap in the sky.

[Beer Baron]

well I have some news. have a set of 6258s for a GTR on the way now. Full kit with full race manifolds, twin 6258s etc. This particular car has run -5s and -10s so it'll be a great comparison. I'm hoping for -10 power with -5 driveability.... I think they'll deliver but there's only one way to find out..... bear in mind they are quite a bit of airflow. 44lb each is a lot of powa for a little 2.6L engine....

[bigmikespec]

So twin high mounts? How 90's JDM of you Mr Baron!

[N1GTR]

well I have some news. have a set of 6258s for a GTR on the way now. Full kit with full race manifolds, twin 6258s etc. This particular car has run -5s and -10s so it'll be a great comparison. I'm hoping for -10 power with -5 driveability.... I think they'll deliver but there's only one way to find out..... bear in mind they are quite a bit of airflow. 44lb each is a lot of powa for a little 2.6L engine....

Keen to see results here

[Beer Baron]

So twin high mounts? How 90's JDM of you Mr Baron!

lol. they should be awesome.

Consider this. look at the EFR range and consider the 9180 flows 94lb/min. a single 6258 flows 44lb/min I would say it's not unreasonable to expect them to produce 80lb/min combined in a twin GTR set-up. that's 800hp of air.

the car they are going on has run 2530s/-5s and made the usual 350kw or so. it's also run GTRS/-10s and made the usual 400+ kw but with typical surge down low that's a pig to drive through (even on the track).

I would like to think these will be close to the -10 power but with close to -5 response. I wouldn't be disappointed if they make a little less than the -10s but without the surge down low and with fat midrange.

I'm not sure if anyone else has bought a set from full race for a GTR apart from the one in the US they tested on. so this may be the first 'retail' set that goes out the door.

hope to have them arrive next week.

The other turbo I got from BW/FR is here and has already been pipped up etc and should be running very, very soon. it's the big boy 9180. another mate of mine has a 8374 coming soon so it'll be interesting to compare the 3. in power terms it goes 8374 then twin 6258 then single 9180. I'm keen to see if that's how it plays out in real life and what kind of power/response compromise we get. the only difference really is the 9180 is on a 3L the other 2 are both 2.6.

[Beer Baron]

Keen to see results here

don't worry I'll keep you informed.

[Beer Baron]

PS.I AM EXCITED.

[Rolls]

So twin high mounts? How 90's JDM of you Mr Baron!

Twin high mounts? what is JDM about that lol...

[GTScotT]

Unopened.

Awesome. I might 'boost it till it blows' with mine and see what comes about. Its been making 200odd @ 14pound since I built it in 03ish so it will be interesting to see how it likes more lol. Having a 4 pot again reopens my interest for the EFR, cant wait to see yours in action!

Also super keen to watch Beer Baron pioneer the SAU EFR stage!

[GTScotT]

Twin high mounts? what is JDM about that lol...

Think pre hype era, when a modified GTR was very much jap territory. Then think big twin kits... What was available back then? Some pretty ordinary garrett stuff and the ageless TD range.

[SimonR32]

Twin high mounts? what is JDM about that lol...

They used to run internal gate high mounts back in the day

[Rolls]

They used to run internal gate high mounts back in the day

Stock ??

[TiTAN]

They used to run internal gate high mounts back in the day

stock capacity RB26 + twin high mount GT35R's pumping 1000+hp

[GTScotT]

stock capacity RB26 + twin high mount GT35R's pumping 1000+hp

STOP.

Hammer time!

[TiTAN]

bit off topic,

[D_Stirls]

PS.I AM EXCITED.

As am i

Kev is as well