im currently running the precision billet 5857 BB .82 a/r what do you think the diffrence in spool time would be if i ran a .64 unstead ?


b16
9:1
oem head ported and polished
victor x intake manifold 2.5 inch charge piping
3inch dp
AFI top mount
xs bov, precision 46mm gated
S300 BBG, 750cc ,255p

just trying to quicken up my spool time a hair.
any body play around with housings latley?

 

With that intake manifold and top mount not that much in between gears. (I'm sure someone will post up a "dyno" of saying there is no change in a top mount than another type of manifold, but the difference is in between gears)

 

so your saying not much of diffrence in the 2 diffrent housings?

 

For the purpose of what you're using the turbo of that size for, not really, just a shift in upper end power so that it is the last few thousand rpms.

 

well what i think ill do is end up buying the .63 a/r housing as well and when i have the car tuned a possible switch depending on how happy i am with spool times.

the car is a weekend warrior and just for fun on the track im hoping with the precision billet unit i will notice a diffrence in comparrison from the gt35.82 journal bearing i have ran the past 2 years. ill come back to the thread to post the dyno diffrences between them wish some here has some first hand experince swapping housings..