is this a nice turbo for a Ca18

[c-rad]

I'm interested in this turbo.. not that I can afford it any time soon. I want fast spool more than top end power, I doubt I'll ever want/need more than 350 tops and even then thats pushing it, for now my current goal (not w/ stock turbo of course) would be 250ish-300ish tops once I upgrade turbo /etc.

I recall it being discussed before, I actually went there looking to see if they sold S15's since F3600 was asking about buying new ones..

didn't see one but they have a GTiR equivalent here or so they say, I'm too lazy to check the specs.

AFAIK, the GT28R and the S15BB are the same thing. Both have 31 lb/min 60-trim/60mm compressor wheels and 62-trim turbine wheels... Same A/R's on the housings too... .60 on the compressor and .64 on the turbine.

[biosehnsucht]

well, supposedly the GT28R is a "dual ball bearing" vs "ball bearing" - at least I never hear them called "double" when referring to S15s, and cheapturbo at least claims its a dual BB setup..

Sure maybe thats "not worth the extra money" but when a new S15 turbo is nearly that much anyways... why not?

[c-rad]

well, supposedly the GT28R is a "dual ball bearing" vs "ball bearing" - at least I never hear them called "double" when referring to S15s, and cheapturbo at least claims its a dual BB setup..

Sure maybe thats "not worth the extra money" but when a new S15 turbo is nearly that much anyways... why not?

Refer to NICO thread-- zerothread?id=96602And... zerothread?id=122495

[biosehnsucht]

See kids, this is why we should search (doh)

[Not_a_sr]

im going to be trying a Big 16G from a DSM on my car, we are building the manifold this weekend, its a EvoIII big 16 from slowboyracing. had a person upgrade to a 50trim and he didnt want his old turbo anymore, figured ill get a dyno out of it, and its suposed to spool up fast and support 350 or so WHP.

[zero_gripS13]

question... in one of above links it mentiones using the s15 compressor housing and center section with a s13 t25 rear secsion... wouldnt u need to bore out the t25 rear for the bigger turbine.. and not everyone can do that cuz u would need to get it rebalanced...this is my understanding form making hybrids from probe and tbird turbos...

[themadscientist]

just slap the S14 or S15 on, reclock the compressor housing a bit, hog out when bolt hole on the CA's turbo outlet pipe and roll. They don't lag, you don't need to build a hybrid anything. The wife's tired old stock CA will wind up her S14 screw like a top in the blink of eye.

[c-rad]

im going to be trying a Big 16G from a DSM on my car, we are building the manifold this weekend, its a EvoIII big 16 from slowboyracing. had a person upgrade to a 50trim and he didnt want his old turbo anymore, figured ill get a dyno out of it, and its suposed to spool up fast and support 350 or so WHP.

I had pondered that idea, but it would be a *****. First off, the way the compressor housing outlet is would make for a chore of IC piping. Next, the turbine outlet for an O2 housing connection would have to be figured out. And thierd, the oil and water lines would have to be setup. By the time you get all that done, it'll be expensive.

BTW, I had this turbo on my DSM. In fact, about 4 of us here in Daytona had it. We had some boost creep issues with it. And we weren't getting full spool til around 3500-3600 RPMs.... on a 2.0L. I imagine full boost on a 1.8 would be closer to the 4k area.

If you can get it all sorted out, post is up as I'd like to see my idea come to life.

[c-rad]

question... in one of above links it mentiones using the s15 compressor housing and center section with a s13 t25 rear secsion... wouldnt u need to bore out the t25 rear for the bigger turbine.. and not everyone can do that cuz u would need to get it rebalanced...this is my understanding form making hybrids from probe and tbird turbos...

It's still a 53.8mm T25 turbine wheel... no mods necessary. The S14/S15 is essentially a T28/T25 hybrid out of the box.

[Not_a_sr]

I had pondered that idea, but it would be a *****. First off, the way the compressor housing outlet is would make for a chore of IC piping. Next, the turbine outlet for an O2 housing connection would have to be figured out. And thierd, the oil and water lines would have to be setup. By the time you get all that done, it'll be expensive.

BTW, I had this turbo on my DSM. In fact, about 4 of us here in Daytona had it. We had some boost creep issues with it. And we weren't getting full spool til around 3500-3600 RPMs.... on a 2.0L. I imagine full boost on a 1.8 would be closer to the 4k area.

If you can get it all sorted out, post is up as I'd like to see my idea come to life.

will do

good to actually talk to someone whos had one! , we will be porting the housing and putting on a larger wastgate flapper, as for O2 housing we sell the flanges and i have plenty of 3" bends so it will only take me a few hours to have one figured out and wont cost me anything. the oil lines i just went shopping yesterday and picked up all the fittings i needed to put togther oil line kits for them, they should be showing up on Ebay next week! that will cover the cost of my personal oil lines. the oult let shouldnt be to bad for IC pipes , im top mounting it on a log, there is no way with the way the wastegate actuator is pointing that it will fit down under in the stock area. if i can get even 10-12psi by 3300rpm ill be happy we will be running 19-20psi hopefully , do they still have anything left in them up that high?

[slownslurious]

why bother? the ca's stock turbine is tiny, the s13 sr's isn't much better. I don't really see how that would offer much (or any) of an advantage over just running the straight s15 turbo... If you HAD an s15 compressor and nothing else, maybe, but since the compressor usually come with a turbo bolted to them I don't know why you would dissassemble.Discuss.

[c-rad]

if i can get even 10-12psi by 3300rpm ill be happy we will be running 19-20psi hopefully , do they still have anything left in them up that high?

A guy with a full weight GSX went 11.7 @ 119 on 24psi and race gas. I imagine in a 240 with almost 500 pounds less weight it would be incredibly fast. I used to run 18-19psi consistently. On 15psi and no tuning (AF of 10.2:1) I dyno'd 245whp and 256 ft-lbs.

How did you plan on running it on a top mount setup with the oil drain? You can't clock the housings on mitsu turbos...

[Not_a_sr]

hmm, cant clock the housings... this might prove to be a problem... we just built the log .might have to make it a bottom mount then. which should be fine with a log as it has more height clearance then the SSauto crap that i have on it. can you not clock the housing do to the wastegate actuator? cause i can work around that. we have considered turning it into a external gated setup to avoid the boost creep issues.

we actually just started taking in alot of DSMs so im trying to learn all this as we can sell this stuff to them all day long.

[c-rad]

hmm, cant clock the housings... this might prove to be a problem... we just built the log .might have to make it a bottom mount then. which should be fine with a log as it has more height clearance then the SSauto crap that i have on it. can you not clock the housing do to the wastegate actuator? cause i can work around that. we have considered turning it into a external gated setup to avoid the boost creep issues.

we actually just started taking in alot of DSMs so im trying to learn all this as we can sell this stuff to them all day long.

There is an alignment pin cast into the center section that sits in a groove on the housing. A bottom mount setup should clear fine...the compressor housings are tiny.

[Not_a_sr]

we are doing a bottom mount.

i actually threw my extra big 16g on ebay so if anyone else want to give it a go i should have manifolds for it after mines done.

[flohtingPoint]

you can get s14 turbo from nissan? is that confirmed? also... aren't the s14 turbos half bb?

Heck, you can get S14 SR20's crate style from Nissan here in Germany. It'll just cost you an arm and a leg.