To the turbo guru's...

[float_6969]

Alright, so last night I was playing around with compressor maps, and I think that the T3 super 60 is a great compressor setup for the CA. (for my goals at least) I know that a T28, is a T3, but it's just the plain 60 trim wheel. The super 60 map looks much better IMHO. So here is what I'm thinking, and I want to know what others think about this.

I'm thinking about picking up another S14/S15 turbo. Probabally an S14 because it'll be cheaper. Get a Super 60 wheel and have it (properly) installed on the compressor side. Then get a stock CA turbine side housing with the .49 A/R. My thought is that this would give the turbo good response, but still move some air.

So what do you guys think? Am I just an idiot, or is this the CA equivalent of the Disco Potato?

[mbmbmb23]

As far as I know the GTI-R (RNN14) turbo has the T3 Super 60 compressor side and the S14/15 has a T04B compressor side. You're idea sounds interesting although I dont know exactly what it would flow.

Here's the exact turbo you're talking about....except with a straight T3 skyline turbine side (not T25 like the CA turbo):

http://cgi.ebay.com/ebaymotors...QrdZ1

-m

Alright, so last night I was playing around with compressor maps, and I think that the T3 super 60 is a great compressor setup for the CA. (for my goals at least) I know that a T28, is a T3, but it's just the plain 60 trim wheel. The super 60 map looks much better IMHO. So here is what I'm thinking, and I want to know what others think about this.

I'm thinking about picking up another S14/S15 turbo. Probabally an S14 because it'll be cheaper. Get a Super 60 wheel and have it (properly) installed on the compressor side. Then get a stock CA turbine side housing with the .49 A/R. My thought is that this would give the turbo good response, but still move some air.

So what do you guys think? Am I just an idiot, or is this the CA equivalent of the Disco Potato?

[float_6969]

...the S14/15 has a T04B compressor side...

I was unaware of this. I'm not doubting you, but are you sure?

[rexhunta]

I was unaware of this. I'm not doubting you, but are you sure?

that sounds extremely large.. got any outside info on where you got this ?

[c-rad]

I was unaware of this. I'm not doubting you, but are you sure?

It uses a T04B compressor HOUSING. The 'B' is the smallest T04 housing there is. S14/15 = T28 compressor wheel in a T04B housing with a T25 exhaust wheel in a T25 housing.

[float_6969]

gotcha, so it's still a T3 60 trim wheel?

[c-rad]

gotcha, so it's still a T3 60 trim wheel?

Yes.

[Not_a_sr]

what are your power goals?

[float_6969]

what are your power goals?

upper 200-lower300. Less concerned with peak HP as I am with a broad powerband and good response.

[81na ZX]

What kind of boost do you plan on running?

at 15psi, you'd be in the decent part of the map from 3500 to 9000 RPMS, so thats preatty good. At 20, your only good from 4000 to 8500. At 25psi, your only on the map from 5000 to 6000rpms.

But anything over 17psi is outside the max efficency of the super 60 wheel.

[iliketocrash]

sometimes you have to sacrafice max efficiency for the sake of good response. besides, these calculations are far from perfect and even though the calculation says you're in the max efficiency range you still might not be. i wouldn't put too much emphasis on the math involved here. the calculations are just around to give people a ballpark figure. the rest is trial and error.

[CA19DET]

remember that the smaller the turbine housing A/R the less lag YES, but at a trade off, it will flow less and restrict HP, and at the same time increase temps because its working harder to move more exhaust gasses, it would be an interesting turbo.. squick spooling, but not really efficient beyond 14psi because of the tiny CA turbine.. and i dont think teh CA turbine housing can push/support 20psi,

maybe a S14/S13 T25 turbine? but then its pretty much turning into a GTiR turbo.. i heard turbonetics is comming/came out with some new T25/T3 sized ceramic turbos?? maybe look into those,

[float_6969]

14-15psi would be the limit. I might do some higher psi runs on the dyno, just for the #'s, but for daily/autoX use, it'll be in the 7-14psi range. That was the reasoning behind the smaller backside.

[Not_a_sr]

hopefully ill get to mount my Dsm turbo very soon and get an idea how it works on the ca's might be a less exspesive way into the 11s then garrett Gt turbos.

if it can make 2G DSMs into 11-12 sec range should do very well on our cars.