Turbo ID please
 

Got the silver NA today that I bought off of Vito. Pulled the turbo, lines, manifold, downpipe and full FM 2.5" exhaust. That will go a long way in building my SAAB exhaust. Just need to remove the cat and add in a section of pipe to accommodate the longer wheelbase but most of the tubing is there plus a free-flow muffler so I'm happy.

As far as the turbo goes, it was called a FM2 kit in the ad so I was hoping for a 2560 or at least a 2554. Looks like I got neither.

Hot side is AR .49 M4. Cold side is AR .48 M24. Same specs as the SR20 T25 that I have but that one is a M10 cold side. It has a factory Overhaul tag on it and the shaft play is zero. Much better than the "fresh overhaul" that I bought on Zilvia.net.

Wastgate is marked 91-092 10 443700.1 so would that be a 10 psi can?

Ended up selling the car for $900, he paid the $308 tow bill and I got the above parts and made $400 and I didn't have to haul it home or part it out so I'm not even mad.

So, what do I have?

Pictars

https://www.miataturbo.net/attachmen...ine=1366516339

https://www.miataturbo.net/attachmen...ine=1366516339

https://www.miataturbo.net/attachmen...ine=1366516339

https://www.miataturbo.net/attachmen...ine=1366516339

https://www.miataturbo.net/attachmen...ine=1366516339

Is it t25 flange?
How is it your sr20 turbo is .49 turbine?? I'm pretty certain all t25 sr20 turbos are .64 ar.
Best thing I can say is to measure the diameters on the wheels.

Same thing stamped on both. Wheels look the same when sitting side by side. Both are T25 flange.

Not much help, but i searched for hours on that m24 trying to find out if it was a model # or something for my own turbo. Turns out it's just a designation of what alloy they used for the turbo itself. Best of luck!

Many views and no one knows what it is?

Is there a serial number or part number on the CHRA?

See if the number crosses here: http://www.turbo-product.com/Nissan/

I used to have two Nissan OEM turbos, one small T25 from a CA18DET motor on a 200SX (on the right of the picture) and a bigger T28 from a SR20 motor on a Nissan Pulsar GTI-R car (on the left of the picture) and both comme with a 3-bolt flange on the compression side, and as you can see the T28 also have a 2 bolt flange on the intake. The adaptators on the T28 are aftermarket ones

https://www.miataturbo.net/attachmen...ine=1366697464

CA18DET turbo.

It's small because only half of the turbos used on that from the factory.

I believe it's the same thing as the SR20 turbo, just with tiny A/R housing.

What do you think upper end of efficiency be? 180-200 whp max? It's for the SAAB.

is the SAAB getting a 1.8L?

I'd expect fast as shit spool, tons of mid range, and nothing above 4-5K. Probably peaks at 150-160rwhp.

the SR20 turbo already dies above 5.5K, and that has a .86 A/R turbine housing.


https://www.miataturbo.net/attachmen...-6vst251-8-jpg

Yes, the SAAB is getting a stock 94 1.8. I have two of these .48/.49 turbos now. If I was baller I'd twin turbo it with a pair of them but I don't see a reason to do that.

Might just sell both and buy something else.

how'd you end up with two? the SR20 is a .86 turbine and .64 compressor housing; you suggested you had an SR20 turbo.

the above dynos are the actual SR20 turbo. You have two CA18DET turbos it seems.

The first was sold to me as a rebuilt SR20. The second one was on the crashed 92 that I bought and was indicated it was a FM2 kit so I assumed it was a 2554 or 2560. Maybe I should just twin turbo it with the two little guys.

do it!

i won't do it :cry:

Pussy.

If I thought it had a chance in hell in not sucking I'd consider it. I haven't built my manifold yet, have two sets of water, oil lines and fittings, all of the manifold components except for needing one more turbo inlet flange.

Seriously, I support this idea.

have you not seen TurboTim's twin turbo setups?

https://www.miataturbo.net/attachmen...ine=1366734123

https://www.miataturbo.net/attachmen...ine=1366734123


then bigger turbos:

https://www.miataturbo.net/attachmen...ine=1366734123

https://www.miataturbo.net/attachmen...ine=1366734123

I have seen them and I wonder:

Why aren't they on a car now?

If they are so great why hasn't anyone else done it?

those are good questions :) :) :) ;)

BRB, posting two CA18DET turbos for sale. :cry:

Yeah sell them and get a proper T25. My friend gave me a 300ZX T22 and said it was a T25. I sold it on ebay for $80 and bought a SR20 T25 for $100 on Zilvia.net.

Sadly, I paid $225 for it as a "fresh rebuilt SR20 T25".:facepalm: I'll likely cut my losses and move on. I need to find one of the V6 swap guys on m.net Engine Conversions board that wants to twin turbo their swap. They would be perfect for that.

OK, say I totally wimp out FOR RIGHT NOW just to get the car up and running and sorted. After what will be 800 hours of building I want to drive it.

I have 94-95 MS PNP, stock 94 motor with unkown miles, coolant reroute, giant intercooler. New FM clutch is already installed.

Per the sticky the tan tops will support 170-190whp.

As this is pretty much a completely new car my plan is to:


1: Get car running on stock injectors, stock computer, wastegate wired open just to be sure I didn't screw up on the swap.
2: Switch to MS, still on stock injectors, wastegate wired open and figure out how to tune
3: Tune the car with the CA18DET and 10 psi or whatever it will do on stock injectors. Or, I do have a set of 550 RX7 injectors.
4: Enjoy 2,100 lb track car with 150-160 whp for the rest of the summer
5: Throw rods in motor and switch to 2860 or 2871 turbo over winter. Retune.

sounds like a plan.

No need to wire wastegate open, just dont connect the actuator.

No that would let it stay permanently closed, making a ventilated block. Wiring it open prevents it from making any boost.

External wastegate? On my car the only thing holding the wastegate closed is the actuator. If you pull the actuator off its free to flap open which the exhaust gas will do.

OIC, you are talking about disconnecting the arm, not the vac line. Yeah, that would work fine. I'd wire it open to keep it from flapping around not connected.

It wont flap. Itll hold open even at idle. Ive done it.

Also, that baby turbo isnt enough to ventilate the block unless you are severely starving the motor of fuel. Ive been there.