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Old 10-16-2015, 05:17 PM   #1
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Default Rx7 turbo

Hello, I have a 1992 miata na and I'm looking to turbo it. I came across a pretty good deal, which is a s4 t2 turbo off of an 87 rx7. My question is is there any manifold I can buy that will straight bolt on to this, or will I have to have a shop fab up a manifold and downpipe. I'm new to miatas and to turboing(not to supercharging though) any answer would help thanks!
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Old 10-16-2015, 05:32 PM   #2
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What's an s4?

Turbos are cheap. Pick one because it is the right one for the powerband of the engine and has common flanges and not weird ones.
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Old 10-16-2015, 05:38 PM   #3
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What's an s4?

Turbos are cheap. Pick one because it is the right one for the powerband of the engine and has common flanges and not weird ones.
Ok, and sorry I'm not quite sure of the s4. Also do you think it would be wise of me to just buy a complete turbo kit or try to piece together most of it. My budget is pretty low too.
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Old 10-16-2015, 05:45 PM   #4
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What's your budget?
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Old 10-16-2015, 05:48 PM   #5
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What's your budget?
I want to try and keep it under 2k. That turbo is going for 100 bucks, which makes room for the megasquirt.
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Old 10-16-2015, 07:38 PM   #6
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Originally Posted by ScrapinMX5 View Post
I want to try and keep it under 2k. That turbo is going for 100 bucks, which makes room for the megasquirt.
2k is going to be pretty tight. You're talking about having the turbo, exhaust, i/c, i/c pipes, BOV, boost gauge, wideband, 1.8L, Torsen, etc. all fit into $1k.
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Old 10-16-2015, 09:17 PM   #7
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S4 is the '86-88 RX-7. The turbo was only offered in '87 and '88 (as S4 models). S5 was '89-'91.

They are all 2nd gen RX7s. The S5 was a minor model change.

The 2nd gen rx7 turbos are really wonky with weird flanges and sizing.

Your life will be much easier if you chose a much more conmon turbo with a much more common inlet and outlet flange.
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Old 10-17-2015, 08:58 AM   #8
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Welcome, ScrapinMX5. Check out the Miata Gallery and post up some pics!
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Old 10-17-2015, 09:28 AM   #9
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Quote:
Originally Posted by Schuyler View Post
2k is going to be pretty tight. You're talking about having the turbo, exhaust, i/c, i/c pipes, BOV, boost gauge, wideband, 1.8L, Torsen, etc. all fit into $1k.
Read impossible in your budget for a reliable setup.
Sure, you can turbo your car for that much, but you will spend more money and have much more down time in the long run than if you just save up and buy a good kit from the start.
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Old 10-17-2015, 01:21 PM   #10
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Read impossible in your budget for a reliable setup.
Sure, you can turbo your car for that much, but you will spend more money and have much more down time in the long run than if you just save up and buy a good kit from the start.
After deciding for a few weeks, I'll just save up for a little more while and buy a Shanghai s kit. I've never installed a turbo before, but would feel a lot more confident doing it knowing I have all the pieces to do it in front of me.
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Old 10-19-2015, 01:22 PM   #11
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Forget shanghai, save for MK Turbo setup. Better for similar money.
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Old 10-19-2015, 04:20 PM   #12
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Quote:
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Forget shanghai, save for MK Turbo setup. Better for similar money.
I would't say everything about my setup is better. The turbo is definitely a better match for the miata, and mine comes with a full 3" exhaust. The Begi cast manifold I will say is better then what I offer.
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Old 10-19-2015, 04:46 PM   #13
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I would't say everything about my setup is better. The turbo is definitely a better match for the miata, and mine comes with a full 3" exhaust. The Begi cast manifold I will say is better then what I offer.
I'm really liking your setup for that price. Does it come with everything I would need besides bigger injectors, ECU, and oil pan tap?
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Old 10-19-2015, 11:00 PM   #14
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You still need intercooler and piping, but that's just a cheap ebay kit away from being all you need there.
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Old 10-20-2015, 09:04 AM   #15
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Quote:
Originally Posted by ScrapinMX5 View Post
I'm really liking your setup for that price. Does it come with everything I would need besides bigger injectors, ECU, and oil pan tap?
What sixshooter said. Basically you have to come up with your own IC and piping, injectors, ECU, clutch.
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