bump.....

i dont think it's the std exhaust housing, possibly a T28 of a SR20 or something..... on the A14 i was making boost from around 3900, 4200rpm, not much fun for street use.

would the housing of a twin turbo .48, be a traight bolt up??

as a general rule you could say the more moddd the engine the bigger the turbo you can use. i have experience with 1, soon to be 2 and in the process of building a highly modded and stupidly expensive 1500. these have a progression of turbo size. slightly modded a14 with a turbo of a ca18, or stock would be good, what i now have is off pulsar gtir, signifcantly bigger. we will see how it is suited next week. the highly modded motor is getting something like the garrett disco potatoe with the smaller a/r of .64. this is 6 months away. i think if you look at the smaller ones you are going to be in the ball park. the ca18 turbo is on full boost (13-14psi) at about 3100rpm. less boost will come on earlier.

Well what are the model numbers that would suit an A15?

what kind of t25 do you have? there are about 10 different types. id tag should be on the centre cooling housing and it has a model number on it. fyi they range from .48 (eg twin turbos off skyline) to .86 air ratios (eg s15 200sx). and those turbos are varstly different in size too? unless the turbo is really small full boost at 2000rpm is not realistic depending on how much boost. 6-8 psi probably might.

Is .64 the standard exhaust? as I am told A T25 should make boost from 2000rpm on an A15.
What is your experience?

just wondering what other exhaust housings people have used on a T25, for a quicker SPOOL up????