billet comp wheel info needed

[j-rod]

Im not exact sure how to read compressor maps but is there a way to tell what psi the turbo is most effiecent at.

Yes there is. The islands represent different efficiencies and the vertical axis to the left is the pressure ratio or boost in terms of atmospheric (i.e. a PR of 2 is ~29.4psi). Looking at the GTX4508 map below, the compressor is most efficient at ~80% with a max pressure ratio of 3 (14.7*3=44.1psi):

 

[kjpcummins]

thanks i was always curious about that.

 

[Timebomb]

I may have one, Wonder what the whole turbo is worth ... LOL

 

[wdimig]

pretty! i want one! where did you find a turbo with that wheel on it? what did it come off? it almost looks like a borg warner turbo that came off of a maxxforce international which some have borg warner vgt's with billet titanium... i know mack uses holsets and thats not a holset..........

 

[BullfrogJohnson]

Mine came off a Cat genset. I believe it was a c-9

 

[Timebomb]

07 Aulstralian Mack E7, you wont find that turbo in the U.S. S400 65/96 comp wheel with a waste gated 1.10 housing. The turbin is close to 74mm, same one as a bullet uses.

 

[BullfrogJohnson]

The wheel ended up being a 64mm S300 titanium Borg wheel.