levnubhin

iTrader: (30)

I can't find one on their site that's a 5 bolt IWG.

SpartanSV

Lots of money for a journal bearing turbo. I bet it'll spool like *** too.

m2cupcar

iTrader: (5)

IMO that's big turbo for a Miata. Agree, it will be slow to spool, especially compared to what you're running now. Are you still just looking for 300whp+? If so, the easy move is to a t3/t4 hybrid. There are few in this thread that are running the eBay t3/t04b with single and dual ball bearing CHRAs. I couldn't find any of the BB versions that were direct swaps. They were either v-band, 4 bolt or 5-bolt w/o a WG port/hole. Here's the journal bearing version of those turbos:
https://www.ebay.com/itm/T3-T4-T3T4-...E/253646032165

That is essentially a drop-in (if the photo is as-advertised) since the WG port sits directly over the turbine inlet. Both turbine and compressor are significantly larger than your current t3 and it will support 300+ hp.

levnubhin

iTrader: (30)

Another eBay turbo bites the dust. 1 HPDE, 2 Autocrosses and maybe 200 street miles. Let's talk name brand drop in for 300 hp.

levnubhin

iTrader: (30)

Carnage

wackbards

iTrader: (2)

Is it rebuildable? What does the thrust bearing look like? IIRC, it's one of the major corners cut. Sometimes sintered, sometimes steel instead of bronze...

navalhawkeye

I've been looking at a GTX 2860R, which I *think* might be a drop in.

Turbo: https://www.atpturbo.com/mm5/merchan...de=GTX2860Rsub

Exhaust housing: https://www.atpturbo.com/mm5/merchan...y_Code=GTHGT28

But not 100% sure if that's bolt in or not. Also, there was a page that you could select all of the stuff in one go, but can't seem to find it right now.

tehzack

That looks about the same as what sonofthehill and I are running.

His car does 120mph in the 1/4. Mine does 7.7 @ 90 in the 1/8th when it's not destroying diff housings and axles.

levnubhin

iTrader: (30)

Not sure, I haven't inspected very closely. I have a replacement on the shelf. I'm just tired of messing with eBay stuff. I want more reliability.

shuiend

iTrader: (24)

Shoot me an email. I might be able to cook you something up that works with something a bit more well named and a little bit better on track.

You have had more trouble with turbo's then anyone else I have talked to with my setups. You also are probably running it harder then 90% of my customers.

m2cupcar

iTrader: (5)

I didn't realize you were tracking the car- though that doesn't seem like much service even from an eBay turbo.

ATP is your go to for Garrett turbos with a Ford 5-bolt exit flange so you can drop it in.

Here's the Garrett equivalent of that eBay t3/t4 from ATP:
Garrett Turbocharger, T3/T4E, 50Trim Compressor, StageIIITurbine : atpturbo.com
You need spec the turbine AR, bolt pattern, etc.

ATP has the Ford 5-bolt turbine housing you need with a bunch of different Garrett GT turbos- like this GT28:
https://www.atpturbo.com/mm5/merchan...ory_Code=GTNBB

Ball bearing:
https://www.atpturbo.com/mm5/merchan...ode=gt-2860-T3

navalhawkeye

Could you share with me as well? Other than the one I killed earlier this year, the 2nd one has been great so far - but curious what your more track/autocross oriented solution might be. My second turbo has done probably 12 autocrosses, and 150 runs.

shuiend

iTrader: (24)

Email me.

levnubhin

iTrader: (30)

Im liking that second link

ridethecliche

iTrader: (2)

Why are you going journal bearing instead of BB?

ysleem

iTrader: (5)

Because some people like more friction and slower spool.

levnubhin

iTrader: (30)

That was helpful.



Totally missed over his third link. What could I expect out of that 2860 with .48 vs the 2860 with .63 a/r?

levnubhin

iTrader: (30)

This has my eye

https://www.full-race.com/store/garage-sale/garrett-gt3071r-turbo1/

SpartanSV

Same compressor wheel as a 2871r. Larger turbine. So a bit more power potential than a 2871r.

Capable of well over 300 whp but spool will be worse than a 2871r. Lots of 2871 miata dyno sheets to get an idea from. You'll likely be giving up a crap ton of spool compared to your current setup.

ridethecliche

iTrader: (2)

I'd get the 2871 tbh. I don't have an MKTurbo, but I've been very happy with mine. Or go GTX if you're going to want to spend more.