[Closed] Borg Warner Efr Series Turbos

[Tyranus]

Or am i allowed to discuss the twin Borg setup here? As i couldn't find any information about it on the net.

[Tonba]

Of Course you can. So long as it is related to the Borg Warner EFR series of turbos...

[Tyranus]

Firstly id like to know if anyone on SAU has gone down the twin EFR7163 path and what kind of results did they net. The turbo is rated at 550hp so would you need to run big boost to hit 1000 ?

[Piggaz]

Didn't brighty have a set on his R32 at one stage? Took 5300 or 5700 RPM to reach target boost (which I thought was mid 20's IIRC). That's on a 2.6.

[Tyranus]

Thats pretty reasonable for a 2.6. Have these puppies been pushed to a 1000hp on a rb powered GTR or skyline?

[bri73y]

I did have a set very early on (3yrs ago), they were prototypes so I'm not sure if the current 7163's are the same config.

Paul is correct, 20psi around 5500 and went on to make approx 600hp from memory. Didn't push them past 20psi so I have no idea where they would end up.

[Lithium]

Roughly 1,000,000 going by Borg Warner's claims for them - they are beyond the Garrett GT3076R/HKS 3037s in flow rating, which used to be strictly "Pro GTR" type territory in the good old days of Japan drag racing. Serious serious business, so that lag isn't that surprising and realistically actually pretty impressive given what would have happened if you wound the boost up to 11. Not really ideal on a 2.6litre circuit car though!

[Tyranus]

When i started my build i had roll drags and 1/4 drag as my main priority. Ive since become more roll and top speed oriented seeing that i want to attend SM1000 next year. Ive got a 2.8 stroker with 288deg kelford cams, i think my cams might be to big for these turbos? I will be on E85, high comp and big boost. I do not want to make another mistake in my turbo choice. Its either going to be twin EFR's or a big single huffer for me.

Edited November 25, 2014 by Tyranus

[Mick_o]

Just go for a big Single man will be much cheaper and easier 9180

[afb312]

Is it enough flow for the hp required ?

[Impulse-NL]

Hello Guys,

Been reading this topic for a while now ... just caught up

Just orderd an 7670 1.05 a few minutes ago for my rb25 build (r33)

Hoping to get around the 500bhp out of this setup for a nice quick street car

rb26 crank

rb26 JE pistons

Eagle rods

custom manifold (2 38mm tial mvs)

delete the vct and put kelford 262 cams in there

Supertech springs

And the suporting mods for these kind of setups(fuel pump/injectors etc)

All will be at euro 98 fuel since we can get that at most places here.

[Piggaz]

Why in the world did you delete VCT?

[GTR_JOEY]

So you can put some super sick Kelford cams on It Paul.. Farrrrkkk don't you know anything?

[Impulse-NL]

Because the cams to use with vct are to limited

[Lithium]

Hello Guys,

Been reading this topic for a while now ... just caught up

Just orderd an 7670 1.05 a few minutes ago for my rb25 build (r33)

Hoping to get around the 500bhp out of this setup for a nice quick street car

rb26 crank

rb26 JE pistons

Eagle rods

custom manifold (2 38mm tial mvs)

delete the vct and put kelford 262 cams in there

Supertech springs

And the suporting mods for these kind of setups(fuel pump/injectors etc)

All will be at euro 98 fuel since we can get that at most places here.

Sounds like an awesome setup!

So you can put some super sick Kelford cams on It Paul.. Farrrrkkk don't you know anything?

Kelford are awesome, I'd put them on anything except an RB25 - nfi why they don't do a VCT cam for them... my only guess is they don't sell enough for those motors to justify the R&D

[Impulse-NL]

Only options are the poncams or the hks 258/264 staggered ... Like lithium says to bad

[Lithium]

Any reason you didn't go for the Pon Cams? Be good to see how the Kelfords go for you

[Impulse-NL]

I need to purchase the cams so its not set yet.

Its just that I want to see something else then the std choices everybody makes.

Hope that it would not be a bad choice to delete the vct that it would realy effect the power.

[bri73y]

I run Kelford cams in my RB25 (264/272) and have retained vct. It's possible, however they are a special order for vct to be retained.

Talk to Kelford, I dealt with Kiel Rasmussen.

[Impulse-NL]

Thanks for the advice

Think I'll give that a shot.