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Old 04-06-2010, 12:09 AM   #1
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Default dustinb's 1990 turbo version 2.0

Well my first turbo setup was a complete DIY with a HKS cast iron manifold and a 300ZX T25 turbo. Divorced gas downpipe, 2.5" charge pipes, etc. Well, it made a bunch of power down low, but not much up top. My insurance expired in August so I parked the car in my garage and started ordering parts. I still can't afford to insure it, so motivation has been lacking a bit to get it done. Plus my new motorbike has been taking up a crap load of time. Here's what the car has in it now (total):

Flyin Miata DIY manifold/downpipe
OBX GT28R Ball Bearing turbo
97 Miata motor
Welded -10AN drain bung on oil pan
AEM EMS ecu, AEM 2 bar map sensor, GM IAT
2.5" charge pipes
Yonaka 18x6x2.5" Bar & plate intercooler
M-Tuned dual feed fuel rail
RX-7 460CC injectors
GM Boost control solenoid
OBX catback echaust
2.5" test pipe
Tein S-Tech Springs
KYB GR-2 Shocks
FCM Bumpstops
94 Rear end with torsen
Racing Beat rear lower control arm brace
Hard dog Deuce roll bar
Walboro fuel pump
PLX Wideband & Boost gauge
Prosport water temp / oil temp / volt gauges
DDM 3 gauge mount
Momo Pilota 2 steering wheel
Iggee seat covers
Konig Retrack 15x7.5 wheels w/crappy 205/50 Kumho AST tires
Racing beat rear side fairings
VIS RE style bumper
custom headlight conversion
Replica rear fiberglass spoiler (two post design)
OEM molded rear mudguards
Clear LED rear side markers
Clear center LED rear brake light
Gizzmo carbon fiber shift light
OBX Racing pedal covers
Brushed Aluminum e-brake handle
Blaupunkt SD28 Stereo
Bazooka Euphoric 5.25" component speakers
Bazooka EL500 Amplifier
Two Bazooka BT6024DVC bass tubes
Monster Cable wiring throughout

So now that the list is done, here are some before and after pics of the turbo installs:
Before - small turbo



Current - big turbo


Awesome filter... to keep the birds out...


Above view


All -AN fittings with silicone water lines


Hotside charge pipe


Hard to see cold side:


M-Tuned fuel rail, rx-7 injectors



My garage - it's not pretty but it works. It's sort of a squeeze with my bike and car in there:


Moar tools!


I love you air compressor:


The sandblaster I rarely use, but it's still awesome:


My awesome motorcycle. 82 Yamaha Maxim 400. $300 a year on insurance...


Interior - The stereo died in my normal family car (4 door 96 integra), so I quickly ripped the Blaupunkt out of the miata. Poor car.



I'm waiting for one part and that is an oil feed restrictor. I also need to get a vacuum line reducer to hook up my wastegate. The wastegate the OBX came with is of unknown pressure, so I retrofitted a wastegate from a miata greddy kit I had lying around. At least I know it will never go over 8psi

I'll post dyno sheets and impressions once it's running. Should be in a couple of weeks or so. I'll also post pictures of massive motor destruction if that also occurs.
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Old 04-06-2010, 12:17 AM   #2
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Getting the most out of a small garage FTW.

The gold thing inline on the upper rad hose: what is it?
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Old 04-06-2010, 12:19 AM   #3
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Getting the most out of a small garage FTW.

The gold thing inline on the upper rad hose: what is it?
Hoping my garage doesn't fall over ftw That gold thing is used to install aftermarket coolant sensors. I put the stock coolant sensor that was on the front of my 1.6 motor in it.
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Old 04-06-2010, 12:22 AM   #4
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Thanks. Where did you get it/part numbers, etc, por favor? I think I may be able to use something similar on my build if the ports are big enough.
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Old 04-06-2010, 12:23 AM   #5
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Originally Posted by webby459 View Post
Thanks. Where did you get it/part numbers, etc, por favor? I think I may be able to use something similar on my build if the ports are big enough.
http://prosportgauges.com/water-temp...e-adaptor.aspx

I had to drill and tap mine to accommodate the larger sensor, but it worked fine. There's also a bolt on it so you can ground the piece to the chassis.
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Old 04-06-2010, 12:25 AM   #6
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i want you bead blasting cabinet......
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Old 04-06-2010, 12:32 AM   #7
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You used it for your fan switch sender, I assume? It's straight threaded, I think, definitely larger than 1/8" NPT. Was there a good bit of meat on there to thread? I'm looking at tapping something like 3/8" NPT. Thanks a lot for the info, timely for me.
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Old 04-06-2010, 12:36 AM   #8
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Originally Posted by webby459 View Post
You used it for your fan switch sender, I assume? It's straight threaded, I think, definitely larger than 1/8" NPT. Was there a good bit of meat on there to thread? I'm looking at tapping something like 3/8" NPT. Thanks a lot for the info, timely for me.
That should work fine. There was quite a bit of metal there.
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Old 04-06-2010, 12:46 AM   #9
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Very cool. Glad to see another person making great use of a small garage!
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Old 04-09-2010, 05:47 PM   #10
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I finally got my oil restrictor, so I installed that, disconnected the oil feed, and then cranked the car with my ignition unplugged. Took quite a while for oil to get circulating through the engine again, but eventually it started spraying like mad from the -4 line. I hooked it back up, reconnected the ignition, and the damn car fired up right away (was sitting for 5 months). No leaks, just a bunch of smoke from a motor that's been sitting too long. Now I need to get some insurance and re-tune the thing.
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Old 04-14-2010, 08:39 PM   #11
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Looks like April 25th will be the day I get the car out. It's the first day of drag racing down here so I'll pick up a day pass, tune it in the morning, and drag it in the evening.

If anyone is curious, here's my OBX turbo spinning:
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Old 04-14-2010, 09:10 PM   #12
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"my wheels keep spinning"

My ******* blades barely turn at idle. My turbo has to be shot for sure.....
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Old 04-14-2010, 09:31 PM   #13
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Quote:
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"my wheels keep spinning"

My ******* blades barely turn at idle. My turbo has to be shot for sure.....
Sounds like it's screwed. My old journal bearing T25 spun quite well:
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Old 04-24-2010, 08:41 PM   #14
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Got insurance today and after about 5 minutes of driving the turbo ate itself. Became completely unbalanced, moves from side to side and makes horrible noise. So yah, it's dead. Just sent an email to OBX to see how this 1 year warranty works.
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Old 04-24-2010, 10:04 PM   #15
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I dont get tired of saying it, just get yourself a chinacharger from ilovetacotaco and call it a day. Spins well at idle, boosts like a ****, keep that oil restrictor there for low oil pressure.
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Old 04-24-2010, 10:11 PM   #16
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I dont get tired of saying it, just get yourself a chinacharger from ilovetacotaco and call it a day. Spins well at idle, boosts like a ****, keep that oil restrictor there for low oil pressure.
I don't want another small turbo. I need lots of power up top for drag racing. I'm an OBX dealer so I wanted to try out their stuff, so far not that impressed. I'll give it one more shot before I give up on them.
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Old 04-25-2010, 01:17 AM   #17
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in for obx warranty win.
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Old 05-04-2010, 11:19 AM   #18
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in for obx warranty win.
OBX warranty fail. I had a catalogue from their 2006 turbo product line, which stated a one year warranty. Figured it was the same on this, but nope. 90 days. I was on 95 days. FML.

Ordered this though, and expecting it today or tomorrow. Will give immediate feedback.
http://cgi.ebay.com/ebaymotors/ws/eB...8866&viewitem=
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Old 05-04-2010, 08:24 PM   #19
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New Godspeed GT28 wet float bearing turbo arrived this morning, and a few hours later I was boosting down the road. The advertised 8psi wastegate was actually 15psi, so I modified an HKS wastegate and it works awesome. With the boost control in my AEM EMS, I'm running 12ish pounds.

PDF Boost plot

The turbo arrives, and Chainsaw the cat appears to be pleased. The filename of the image is 666 though, which is a bad omen.


It gets even worse when the Godspeed box breaks the Sword of Odin. Doom is inevitable.


The product just become a whole lot more generic. Chainsaw the cat is scared.


The bag is not suitable for food! Who knew?!


The turbo hiding in a bag of oil. Usually that means it's made out of high quality metal products.


Turbo installed and holy crap working awesome


Mmmmmm, a new turbo that actually works for under $300... can't believe it.


Specs:
Compressor trim: .60 ar
Compressor Wheel diameter: 54.28 /71.32
Turbine wheel diameter : 45.47 / 52.90
Exhaust trim: .84ar

Turbo:
http://www.godspeedproject.com/store...roducts_id=825
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Old 05-04-2010, 08:38 PM   #20
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Wicked dude.

I like the plot style you have there too... i need to check that out.

What boost solinoid are you using in the EMS?
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