Further Thread on Oil Supply - Page 2 - Miata Turbo Forum - Boost cars, acquire cats.

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DIY Turbo Discussion greddy on a 1.8? homebrew kit?

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Old 10-30-2013, 01:28 PM   #21
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Quote:
Originally Posted by sixshooter View Post
Does it use the hot or cold side head gallery? Does it use a ball bearing turbo? They use very little oil.
The ones by Nitro and Sturovo are hot side. I guess you are asking about the SP versions. For me, I'm wanting to use a journal brg unit. Agree that BB would be less of an issue.
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Old 10-30-2013, 01:29 PM   #22
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Seriously, that is the BEST news I've heard thus far. Pics FTW!

What size turbo out of curiosity, and how were they controlling it?
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Old 10-30-2013, 01:30 PM   #23
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someone find all the deets on these cars asap lol
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Old 10-30-2013, 01:45 PM   #24
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MX5CarTalk.com NB SP / SE (Mazdaspeed) MX-5 Miata Comparison Claims a GT2560R @ 7 psi or GT2860R @ 5 psi.

Some Pics Here: New Car Test - Mazda MX-5 SP Turbo - AutoWeb New & Used Cars first one looks to show braided oil feed from hot side.
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Old 10-30-2013, 01:55 PM   #25
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The description of "The Shortcomings" sounds exactly like someone running a powercard or other piggyback controller.



Someone use magic and find these two images in higher resolution. It seriously looks like a braided line pointed straight UP and then running down to the turbo.
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Old 10-30-2013, 01:56 PM   #26
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WHAT THE DEUCE?

Wow, I never even heard of that thing. I mean its not really OEM, but looks like it was possibly overseen by Mazda or at least a small division of it?

Very interesting.

And yeah, I tried to blow up those pictures too with no luck
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Old 10-30-2013, 02:08 PM   #27
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Old 10-30-2013, 02:11 PM   #28
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Ok now I'm really tempted to use that location lol

You can tell that thing is nowhere near OE standards, but the fact that they came with a warranty from mazda (if I'm reading that right) definitely puts me at ease
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Old 10-30-2013, 02:23 PM   #29
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I'll be honest, I kinda like the airbox thing.
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Old 11-02-2013, 09:51 AM   #30
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I have coming:
1/8BSPT to -AN4 fitting for head port
-4AN 90* to -4AN straight hose
-4!N to 10x1.5 fitting for turbo, with built in 1.5mm restrictor

The only thing I'm missing is a Tee.

The plan is to connect a gauge to the hose and map pressure vs RPM dead-headed. Then add the Tee and the restricted "inlet" piece, and the CHRA, and remap the pressure with the oil flowing through the (non-spinning) turbo. This should pretty much tell the extent that this set-up will starve the valve train. I should be able to get some feel for the flow-rate as well, but I don't know what is right amount. I will post cups per min, I suppose, along with video.

The timing on this will depend on my ability to source the Tee and whatever connections I need to add the gauge.
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Old 11-02-2013, 10:03 AM   #31
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The SP was made in limited numbers, there were 100. There is one that is white, there is only 1 white one, it is known as the Unicorn.

They use a GT2560 and were genuine mazda vehicles. from the dealership with full regular warranty, they are the fastest MX5 ever released from the factory by FAR, they bend rods in OEM form.

Dann
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Old 11-02-2013, 12:46 PM   #32
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I was also tempted to use the head oil galley on my 99 efr build but the oil galley does have a restrictor on it (see pasage between 2 and 3 cyl) and i chickened out at the end and runned the oil line from the pressure sensor like most people have done 😕
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Old 11-02-2013, 12:53 PM   #33
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?

Dann
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Old 11-02-2013, 02:08 PM   #34
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I'd be interesting to get a measurement on that restriction. (hint hint)

Not that we'd be able to find an SP to measure, but its a nice thought.
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Old 11-02-2013, 02:16 PM   #35
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From reading this thread, and the previous, I'm still skeptical. I'm not saying for sure it's a bad idea, just the evidence isn't there. Yes dann has done this a lot, and the SP seems to do it, but that really isn't a good sample of data. Seems like Mazda likes to make small changes between years to various things, and it's very possible that although this may work great on some year engines, it may fail miserably on others.
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Old 11-02-2013, 02:39 PM   #36
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Turbos require very little oil, so I'm not very worried about that. I would be concerned more about the cam bearing surfaces.
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Old 11-02-2013, 04:49 PM   #37
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The hole on the galley restrictor is 0.0945"
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Old 11-02-2013, 05:03 PM   #38
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Quote:
Originally Posted by HHammerly View Post
The hole on the galley restrictor is 0.0945"
Bitchin' Thanks HHammerly. You said that was a 99 block, right? That means solid lifters. Anyone got a 94-97 block to measure?
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Old 11-02-2013, 05:37 PM   #39
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Actually the restrictor measured is from a 2000 block
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Old 11-02-2013, 09:07 PM   #40
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Here we go, this is the engine I pulled out:



As far as I know it's all as it came from Mazda Australia, it certainly looks the same as other SP cars I've seen.

Cheers
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