Borg Warner S256 specs clarification needed

[eclipseGSTud]

I'm about to buy a Borg Warner S256 extended tip turbo from SBR, but I noticed that on some websites the turbine wheel seems to be different in size. I'm contacting SBR about it, but can S256 users or vendors verify if there's really different wheel sizes for the S256? I'll be getting the turbo with the DSM housing option.

On Bullseye Power's website for the external wastegate S256 w/ DSM housing:
Turbocharger Name - S256
Compressor Wheel Part # - 200100-1
Compressor Wheel Inducer - 56mm
Compressor Wheel Exducer - 80mm
Compressor Wheel Trim - 49
Turbine Wheel Inducer - 69.5mm
Turbine Wheel Exducer - 61.5mm
Turbine Wheel Trim - 78
Turbine Wheel Part # - 210100-2
Turbine Option - Outlet - DSM external
Turbine Option - Inlet - DSM
Turbine Option - A/R - 0.55
Horsepower Rating - 300-550


On Extremepsi's website for specs on the S256 turbo:

Turbocharger Name - S256
Compressor Wheel Inducer - 56mm
Compressor Wheel Exducer - 80mm
Compressor Wheel Trim - 49
Turbine Wheel Inducer - 74mm
Turbine Wheel Exducer - 64mm
Turbine Wheel Trim - 75
Horsepower Rating - 300-550

 

[THE_ARTIST_]

I believe the first one is the correct one, and the one on extremepsi's site is a john deere turbine wheel but BEP used to have it on thier site and maybe extreme hasn't updated thier site wit the new/correct S256 numbers. Maybe wrong though.

 

[dsm-onster]

Bullseye has both wheels on their site: click! And it shows right there in the chart that you can get the 200100-2 turbo, the s256 with the bigger turbine wheel (20trim), with the bolton housing.

With the .55 a/r bolton housing, I suggest the bigger wheel; if you even care to remain with a mitsu footprint. The small wheel is about the size of an hx35 turbine wheel, or in between t31 turbine wheel and t350 wheel.

 

[eclipseGSTud]

Sorry, I'm not familiar with the holset turbos. Is there a significant difference between the two turbine wheels I listed in the original post for the s256? I'm aiming for streetability than just top end power, but I don't want to restrict top end too much. To my understanding the smaller turbine wheel will spool faster, but will probably produce less power comparably at the same psi. Does anyone currently use a S256 with the larger turbine wheel? I want to know what the spool characteristics are (i.e., when full spool is reached) and how much more lag there is compared to the smaller turbine wheel option.

 

[dsm-onster]

What is your goal? If no more than about 550whp, go for the smaller s256 wheel. Other wheels of the same size can do about this and still maintain more streetable spool speed.

 

[eclipseGSTud]

So after checking with SBR and Bullseye Power, the S256 in the BEP DSM housing is only available in the configuration listed below:

Turbocharger Name - S256
Compressor Wheel Inducer - 56mm
Compressor Wheel Exducer - 80mm
Compressor Wheel Trim - 49
Turbine Wheel Inducer - 74mm
Turbine Wheel Exducer - 64mm
Turbine Wheel Trim - 75
Horsepower Rating - 300-550

The other turbine wheel is not being offered and Bullseye Power stated that they have outdated information on their website and options they no longer offer. They should really update their website to show an accurate selection of their current products. Anyways, now I'm deciding on the oil return line kit to buy. The two kits I've been looking at are:

SBR Turbo Oil Return Line Kit (Stainless Steel)
Slowboy Racing, Inc. :: Mitsubishi :: DSM :: Do It Yourself Parts :: Misc. :: SBR Turbo Oil Return Line Kit (Stainless Steel)

OR

SBR Turbo Oil Return Line Kit (Pushlock Style)
Slowboy Racing, Inc. :: Mitsubishi :: DSM :: Do It Yourself Parts :: Misc. :: SBR Turbo Oil Return Line Kit (Pushlock Style)

Which do you think is a better choice? I couldn't find much review on the pushlock style.

Regarding the oil feed line I have a 4-an stainless steel line that goes from oil filter location to turbo. Should I re-use it or get a new one for the new turbo? Some people are telling me to use oil filter location as source and some say use the head as source for oil feed line, which do you guys recommend with this turbo?

Dsm-onster, my whp goal for the car is to reach 350 whp on pump gas. That is my current goal with this new turbo and I will definitely push this turbo as much as I can to reach higher whp goals later, but I'm restricted on 91 octane. I'm considering using meth injection in the future.

 

[2gGSX]

So after checking with SBR and Bullseye Power, the S256 in the BEP DSM housing is only available in the configuration listed below:

Turbocharger Name - S256
Compressor Wheel Inducer - 56mm
Compressor Wheel Exducer - 80mm
Compressor Wheel Trim - 49
Turbine Wheel Inducer - 74mm
Turbine Wheel Exducer - 64mm
Turbine Wheel Trim - 75
Horsepower Rating - 300-550

The other turbine wheel is not being offered and Bullseye Power stated that they have outdated information on their website and options they no longer offer. They should really update their website to show an accurate selection of their current products. Anyways, now I'm deciding on the oil return line kit to buy. The two kits I've been looking at are:

SBR Turbo Oil Return Line Kit (Stainless Steel)
Slowboy Racing, Inc. :: Mitsubishi :: DSM :: Do It Yourself Parts :: Misc. :: SBR Turbo Oil Return Line Kit (Stainless Steel)

OR

SBR Turbo Oil Return Line Kit (Pushlock Style)
Slowboy Racing, Inc. :: Mitsubishi :: DSM :: Do It Yourself Parts :: Misc. :: SBR Turbo Oil Return Line Kit (Pushlock Style)

Which do you think is a better choice? I couldn't find much review on the pushlock style.

Regarding the oil feed line I have a 4-an stainless steel line that goes from oil filter location to turbo. Should I re-use it or get a new one for the new turbo? Some people are telling me to use oil filter location as source and some say use the head as source for oil feed line, which do you guys recommend with this turbo?

Dsm-onster, my whp goal for the car is to reach 350 whp on pump gas. That is my current goal with this new turbo and I will definitely push this turbo as much as I can to reach higher whp goals later, but I'm restricted on 91 octane. I'm considering using meth injection in the future.

I feed mine from the filter housing, through the RED FP inline oil filter (.1" restrictor), through a -4 AN line, then through the adapter flange from Bullseye, which has a smaller built in restrictor. I've had the turbo for roughly 6,000 miles or so like this, and have had no problems or shaftplay develop.

The turbo can make much more than 350 whp, even in the small bolt on housing.