dustinb

I used to have a really small Garrett t25 from a 300zx on my 1.8 motor. Decided I wanted more top end, and since I am an OBX dealer, that I would test their turbo's to see if I could sell them. Well of course, being OBX, they're hard to deal with (I don't think they speak english), and there are no specs for their turbo's. Anyways, I ordered the GT28R with t25 housing, and just got it today.... And I'm not sure if it's just because my turbo was so small before, but this thing is freaking massive. The turbine side is 64, and the compressor side is .70 AR... it's a ball bearing turbo... when the hell is this thing going to spool?

sixshooter

iTrader: (12)

What are the sizes of the compressor and turbine?

And out of curiosity what did it cost?

Newbsauce

iTrader: (2)

I found your problem. Measure the wheels.

levnubhin

iTrader: (30)

take it apart, measure everything, post measurements.
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hustler

iTrader: (6)

internal wastegate fail.

gospeed81

iTrader: (51)

1. I don't believe in "too big"

2. How didn't I know you were an OBX dealer? Got any of the Honda B18 Skunk2 intake manifold knock-offs?

3. You can get an idea by the measurements...but actual compressor efficiency will play a big role. Since they obviously don't test them (or provide compressor flow maps), you're stuck doing real world application-based testing.

In for datalogs of 2000-4000rpm spool in 4th.

Braineack

iTrader: (62)

its just a big housing...I like that compressor housing. It's also really easy to unbolt and measure that compressor wheel dawg.

y8s

iTrader: (8)

it will spool by 4000.



similar to this maybe?

Stein

iTrader: (46)

It's an OBX R so that should be good for lowering spool by 500RPM.

Heck, you have it, might as well slap it on and give it a go. Then we will KNOW when it will spool.

miatamike

I have a GT28R as well. I hit full boost at 3500 RPM (2.0l Stroker)

Stein

iTrader: (46)

I'm not picking on you but actually want to know more about your car/motor. Go post a noob thread in the Meet and Greet section with some specs and photos of your car.

hustler

iTrader: (6)

round hurr we call that a gt2560. Hi mike!!!

Braineack

iTrader: (62)

I'm pretty sure it's just a big housing on a small 60mm compressor wheel.

DragonsMaw

iTrader: (3)

You're an OBX dealer? I think you're giving me reason to go to the island if/when I have money.

miatamike

Please see Noob Post #2

miatamike

Hey Hey Trey Trey ;-)

dustinb

OK OK I'll take it off apart and measure it I can't slap it on the car as I'm waiting for my new flyin miata DIY manifold / downpipe to arrive (they're 2-3 weeks backordered).

Full_Tilt_Boogie

iTrader: (1)

this looks like the turbo on their site, and liek you said no specs, lol

Product Name - OBX Racing Sports

dustinb

Yup that's it I have a 2006 turbo product catalogue from them with full specs, but they've changed everything since.

dustinb

It cost $550, and at this point I'm quite impressed by it... it's even water cooled, which I really wasn't expecting.