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Anyone know a good way to plumb the iac in an na8 turbo build?

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Old 03-06-2024, 04:51 PM
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Default Anyone know a good way to plumb the iac in an na8 turbo build?


It's in a 1997 na8 Miata and I'm struggling to route this iacv into the intake like I'm supposed to. its like right next to the hose it needs to go into so I can't really do a fitting, and any tube to route elsewhere would have such a sharp bend it would kink up. Also can't make the 90 degree go any farther away from the intake manifold cause it will hit the radiator.

First post sorry about any mistakes.
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Old 03-07-2024, 08:34 AM
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I can't recall exactly what I did but I will try to get a picture of it for you soon.
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Old 03-07-2024, 10:35 PM
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I see things like this in various sizes on ebay.
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Old 03-08-2024, 05:02 PM
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Swap to an NB TB - they don't have that fitting, they bypass internally. Will need to change out the TPS and IACV connectors tho.
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Old 03-08-2024, 05:42 PM
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If you're running speed density just put a filter on it.
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Old 03-11-2024, 02:23 PM
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Originally Posted by msmola2002
Swap to an NB TB - they don't have that fitting, they bypass internally. Will need to change out the TPS and IACV connectors tho.
Decided to go this route cause it seemed easiest. do you by chance have a resource for the wiring of the iac and tps? I'm sure I could figure it out, but finding a source to reference would be nice.
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Old 03-11-2024, 02:24 PM
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Originally Posted by niterydr
If you're running speed density just put a filter on it.
​​​​​​Too close to the pipe to even do that to be honest. Also while looking into this Ive seen people mention this can cause boost leaks and I'd rather be safe about it.
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Old 03-25-2024, 09:16 PM
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https://bofiracing.co.uk/forced-indu...a-mx-5-na-1-8/
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Old 03-25-2024, 10:04 PM
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Run a NB throttle body. Smaller IAC valve that's all internal, just need to change your TPS and IAC pigtail. If you order a S2 throttle body, get the NA one, and order this adapter: https://www.speedsageengineering.com...b-iacv-adapter

Then you can run your NA TPS/pigtail, an NB IAC, and only change one pigtail. You'll also need to source the IAC of course.
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Old 03-26-2024, 09:37 AM
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I did a remote IAC on my SC setup, but for you if you could locate the right silicone adapter would be easiest.
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