90 Turbo Selection

Post by **Kadath128** » Mon Oct 20, 2003 9:41 am

Alright I've been doing a lot of reading through this forum trying to figure out what would be my best bet here but most of the info I see is for later models with the KA24DE and looking for high top-end power.

I'm more interested in good boost on the low end, low Turbo lag looking for around 230hp. What would be my best bet here? The Z31 turbos? Or somthing else out there?

It would be nice to be able to pull something out of the yard but I'm not too against buying the parts and kitting it myself. Any suggestions would be nice thanks.

Post by **rco8786** » Mon Oct 20, 2003 9:41 am

I'm thinkin T3(came on z31's). 230whp should be attainable around 8-10psi with very little turbo lag(like, spooled at 2600). If you can find a low mile z31 in a yard then pull that. Or they also came on rb20's, which are a little newer...and of course they are all over ebay.

Post by **andrave** » Mon Oct 20, 2003 9:41 am

do a search on the Z31 turbo, someone on here was talking about htem earlier. I think the consensus was that they suck and had a weird flange.

Post by **Kadath128** » Mon Oct 20, 2003 9:41 am

Yeah I read about the whole Z31 thing and was fairly unimpressed with the info coming out. Really a decent kit that didn't come with things I don't need (like the air intake) would work too I suppose.

I know there are a few kits out but I've not liked the majority of the reviews on them and none of them were for this year of car. I have no problem getting my hands dirty or getting a lil cutom work done if it's more effective later on.

My cap on this project is around 2k with a little more for a buffer. I DO NOT want to do an engine swap as I've read that it's not all that bad with the KA.

What about a T03/04 hybrid? Read some about them but not quite sure if it fits what I want. I don't know a lot about turbos, my mechanical expert is away for a while (dad).

Post by **:: orion ::** » Mon Oct 20, 2003 9:41 am

WTF - What about a Z31 turbo do you think sucks???

They are a GREAT junkyard turbo for the KA...

The flange is the same as ANY other T3/T4...what about that is weird??? Unless you mean the DP (turbine outlet) flange...that's kinda weird but you can buy flanges for $20.

Don't believe all the hearsay that gets tossed around...learn to read compressor maps and check out T3 60-trim - That's what's on a Z31.

They're great for 5-10psi, and 10 will almost surely max out some 370s with ~250rwhp.

Later - Brian

Post by **andrave** » Mon Oct 20, 2003 9:41 am

**** youre right, I was thinking of CT 26 from the supra. stupid stupid stupid.

Post by **WDRacing** » Mon Oct 20, 2003 9:41 am

LOL, I have a T3 from my Skyline, you can have it. Either pay for shipping or wait till I get back stateside in December. I've been holding onto this damn thing for years now. I'm tired of it taking up space. It will work good up till 14 psi, after that the turbine wheel becomes the weak point.

If you want a new turbo, which I suggest, you can get a really cheap from here. http://store.yahoo.com/cheapturbo/gartur.htmlIf all you want is 230 hp and no lag get the T3/TO4E, 50 trim with the .48 AR. Boost should be almost instant. If you think you might want to be able to run a bit more boost for higher figures later, get the turbo with .63 AR. Which also comes on boost really well, but is better for top end.

Oh, in case you still want a junkyard turbo, the Z31 turbo is a good turbo to use.

WD

Post by **Kadath128** » Mon Oct 20, 2003 9:41 am

See now that was what I was looking for. And I dunno much about if a Skyline turbo will fit but yeah I'll take it :ylsuper And anyway's I'm sure I can find a use for it.

Post by **andrave** » Mon Oct 20, 2003 9:41 am

what motor is that from? if its from an RB20 is alright, an RB25 would be a terrific turbo, and a single turbo from an RB26dett would probably suck.

Post by **andrave** » Mon Oct 20, 2003 9:41 am

WD racing- I checked out that link, seem to have very good pricing. What is up with the T3/60-1? that thing has a tiny lil T3 turbine with a friggin humungous compressor. Is it any good? Comes with 360 degree thrust bearing too, and the price isn't that much higher than a regular T3/T04 .63....

Post by **Kadath128** » Mon Oct 20, 2003 9:41 am

Honestly paying the shipping cost for a turbo doesn't seem to be all that bad, no matter where it came from. Worse case I have to put it in something else... Don't think I'll cry over that.

Post by **Kadath128** » Mon Oct 20, 2003 9:41 am

Well since I got an answer in two days from this thread figured I'd hit it again with another q.

About 50/50 of the articles I read reccomend some sort or other of fuel upgrades when adding a turbo. Now I think I have slightly more modest gains in sight than some of the other folks so maybe andrave or WD can set me out straight here.

How neccisary is it really? I mean is a it a big to do are a suggested for safety kinda thing. I'm not close to done after the turbo (which itself isnt really started yet :P) but how much does it matter in the long haul? Cause right now I'm leaning on saying no. Unless it'll fit in with my 2k budget for now. psh...

Post by **andrave** » Mon Oct 20, 2003 9:41 am

I'd say you will need at least 370cc injectors and an SAFC...the RRFPR has been done a lot too on the stock injectors, but I've heard so many people that had problems with it that I wonder....and of course there is also the hacked mafs route, which is incredibly economical. If you don't want to upgrade injectors you will have to spend some time on the dyno monitoring your a/f and increasing boost slowly to find their limits...

Post by **Kadath128** » Mon Oct 20, 2003 9:41 am

so upgraded injectors it is, guess the next part? That's right any suggestions?

Post by **WDRacing** » Mon Oct 20, 2003 9:41 am

370's and a hacked MAF is the cheapest route. Seems pretty damn good to if ya read Orion's thread.

The turbo from the RB25 and the RB20 are basically the same, other then the turbine wheel.

Boost will be almost immediate with a KA.

WD

Post by **andrave** » Mon Oct 20, 2003 9:41 am

RB25 had the ceramic wheel and ball bearing center section, if memory serves. I also believe that it was larger than the RB20. had a page that broke down the nissan turbos somewhere... maybe tomorrow I'll dig it up.

Post by **Trppen37** » Mon Oct 20, 2003 9:41 am

WDRacing wrote:370's and a hacked MAF is the cheapest route. Seems pretty damn good to if ya read Orion's thread.

The turbo from the RB25 and the RB20 are basically the same, other then the turbine wheel.

Boost will be almost immediate with a KA.

WD

YAH Hacked MAF and 370's is the way to go,make sure the piping is like under 3in "well if your running under 10 psi I believe?"... anyways anyone with a SAAB 900 or 9000 or a z31 or RB20 T3's im interested in purchasing one so if you have one ill probably most likely buy it from you...just e-mail me [email protected]

Post by **Kadath128** » Mon Oct 20, 2003 9:41 am

So basically a hacked MAF and a BTM should be fine right? Only issue is waiting to see for sure if the S13 MAF is hackable... but I can imagine why not, if it's so simple for the S14 couldn't be that much harder... Ohhh the research :P

Post by **Kadath128** » Mon Oct 20, 2003 9:41 am

All right I'm back again with another hang up. I already searched but all the turbo intake manifolds were (ta da) once again for teh DE. Anyone know where on can be had for my year? Much appreciated :P

Ehh Nuts to this I'm gonna pick up the realnissan kit.

Post by **Trppen37** » Mon Oct 20, 2003 9:41 am

realnissan manifold... or jgstools.com

90 Turbo Selection

90 Turbo Selection

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