turbo inlet size for a BW S258

[kaganader]

Hey everyone,

Well as the title says what size intake should I get for this turbo.

I do not have this turbo yet, and asking for future reference for a build i will be doing sometime in the future.

Thanks,
Chris

 

[6-bolt]

The turbo inlet on a BW258 is 4inches. I have the turbo, and went with a Forced Performance 4inch intake pipe.

http://www.6bolt.com/Engine/fp_exhaust_pics/DSCN0494.JPG

Darren
6Bolt

 

[kaganader]

Thanks 6-bolt for the quick reply

 

[6-bolt]

No problem. Glad that I could help.

FYI, this thread was a lot of help with the BW S200 turbo. The guy had a S256, which is almost the same as the S258.

http://www.dsmtuners.com/forums/turbo-system-tech/273389-borg-warner-s200-bullseye-s256-review.html

Darren
6Bolt

 

[viperlp01]

There actually is a formula to figure out which intake size you would need to maximize efficency. It is on the garret site. alittle overkill but pretty interesting....

Air Filter
It is important to appropriately size the air filter for the maximum flow rate of the application.
For our specific example, we are looking for target face velocity of <=130 ft/min at redline to
minimize restriction so as to provide the turbo with all the air necessary for it to function optimally.
If the turbo does not have access to the proper amount of air, excessive restriction can occur and cause:

Oil leakage from the compressor side piston ring, which results in oil loss, a fouled CAC
and potentially smoke out of the tailpipe.
Increased pressure ratio, which can lead to turbo overspeed.
Overspeed will reduce turbo durability and could result in an early turbo failure.

Determining the correct air filter size
Example:

Face Velocity = 130 ft/min
Mass Flow = 40 lbs/min
Air density = 0.076 lbs/ft3

Mass Flow (lbs/min) = Volumetric Flow Rate (CFM) x Air Density (lbs/ft3)

Volumetric Flow Rate (CFM) = Mass Flow (lbs/min) / Air Density (lbs/ft3)

Volumetric Flow Rate = 526 CFM

**For twin turbo setups, simply divide the flow rate by two.

Face Velocity (ft/min) = Volumetric Flow rate (CFM) / Area (ft2)

Area (ft2) = Volumetric Flow rate (CFM) / Face Velocity (ft/min)

Area (ft2) = 526 / 130 = 4.05

Area (in2) = 4.05 x 144

Area = 582 in2

Now that we know the required surface area that our air filter must have, we need to determine
the correct air filter size using information provided by the filter manufacturer. We will
need to know the following information about the filters we are considering:

Pleat height
Pleat depth
Number of pleats

Example:



Pleat Height = 9.00
in.

Pleat Depth = 0.55 in.

# of Pleats = 60







Area (in2) = pleat height x pleat depth x # of pleats x 2

Area (in2) = 9.00 x 0.55 x 60 x 2

Area = 594 in2

Actual Filter Area (594 in2) > Calculated Area (582 in2)

Since the actual filter area (594 in2) is greater than the required area, this air filter will work for our application.

 

[kaganader]

Viper that made my head hurt more then this

but thanks for this info, it will greatly come in handy

 

[6-bolt]

There actually is a formula to figure out which intake size you would need to maximize efficency. It is on the garret site. alittle overkill but pretty interesting....

Actually it is a formula to make sure your intake filter is large engouh.


It is interesting. Does anyone know how to calculate the 'Face Velocity,' beside Volumetric Flow rate (CFM) / Area (ft^2). Is it based on the inducer or the exducer of the compressor?

Thanks,

Darren
6Bolt

 

[phunny]

Actually it is a formula to make sure your intake filter is large engouh.


It is interesting. Does anyone know how to calculate the 'Face Velocity,' beside Volumetric Flow rate (CFM) / Area (ft^2). Is it based on the inducer or the exducer of the compressor?

Thanks,

Darren
6Bolt

I raise you from the dead...

Anyone out there got the answer to finding face velocity?