NA Miata Engine Swap Question

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NA Miata Engine Swap Question

Postby LateNights » Fri Aug 18, 2017 6:00 pm

Heyas

Quick question - can anyone tell me what might be involved with swapping the 124 Spider engine into an NA3?

Thanks

Matt
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Re: NA Miata Engine Swap Question

Postby Brian » Fri Aug 18, 2017 6:41 pm

Certainly possible... but a motor swap from scratch means lots of custom bracket work, custom engine mounts, etc. Unless your fabrication skills are REALLY good, far easier to add one of the many turbo or supercharger kits to a Miata motor that already bolts up to your NA3.
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Re: NA Miata Engine Swap Question

Postby LateNights » Fri Aug 18, 2017 7:11 pm

I'd get a shop to do the work - but first I thought I'd try to get a feel for whether it will actually fit without firewall cutting etc. before I get way too hung up on the idea.

That said, whilst I understand the existing kits are a better option, my heart lies with this swap - it "feels" almost like a factory upgrade of sorts, like a newer Porsche motor in an older Porsche.

Regardless, it's a long way from happening right this moment, but if it's not too crazy it may just happen when I get more serious about a track car.
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Re: NA Miata Engine Swap Question

Postby Brian » Fri Aug 18, 2017 8:12 pm

Yes, small 1.4 turbo motor....it will get in there pretty easily compared to most engine conversions.
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Re: NA Miata Engine Swap Question

Postby LateNights » Fri Aug 18, 2017 9:37 pm

Any thoughts on a transmission?

I believe the Fiat uses the NC 6 speed - that's not likely to fit is it?

Is the NB box strong enough?

Mind that I'd up the power somewhat with boost and/or an exhaust at the very least.
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Re: NA Miata Engine Swap Question

Postby Brian » Sat Aug 19, 2017 6:04 am

Go a dozen more threads down the page to Ryan's LFX Swap into NA project. That will give you an idea of the work involved, whether it is 6 piston or 4 piston won't make too much difference. And there is a kit for that LFX swap, makes a lot more sense for a track beast than the Fiat motor (he had a turbo Miata motor in that NA for years before starting into this new swap).
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Re: NA Miata Engine Swap Question

Postby LateNights » Sat Aug 19, 2017 8:43 am

:lol:

Might have misspoke when I said track car - I'd call Ryan's car a race car...

I meant a secondary car that I wouldn't mind taking to the track - more akin to some of the "retro modded" cars you see on miata.net with at least some consideration for performance - but nothing likely to get me killed!!

LFX certainly looks to be a more than decent swap though, and I will get around to reading through the thread in the next few days - but as far as a motor goes, as I said earlier if it's at all possible I'm set on the little Fiat donk.
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