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NA differences?

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Started by Justin Fowler , 03-05-2012 09:05 PM

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#1
Justin Fowler
Posted 03-05-2012 09:05 PM

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Maybe you guys can give me a general rundown about this. I have searched the forums and google several times and yet to find what I am really looking for.
What are the biggest differences in the 89-93 and 94-97 cars? Obviously the 1.6 vs 1.8 engine, but if these cars look alike how would you be able to tell if a 89-93 had a 1.8 swap? Is that legal to have a stock 1.8 and all the other accessories swapped into an earlier year? How would you be able to tell the difference? Just a thought been running through my head recently

#2
forestdweller37
Posted 03-05-2012 09:44 PM

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Try miata.net for the year to year differences.
http://www.miata.net...rica/index.html

Sorry I can't help with the other questions.

#3
Ron Alan
Posted 03-05-2012 11:17 PM

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Only 2 major differences...motor and diff. Dashes are also slightly different. Looking at the motor there are 2 things that will catch your eye right away(in a stock motor). 1.6 cam angle sensor is on the back of the head on the passenger side. 1.8 is on the driver side. 1.6 has a air flow meter while the 1.8 has a Mass air flow sensor...once you see the 2 you'll never be confused. There are many other little differences but these are obvious. No swaps in SM other than what was original to the car(motor size and gen that is)

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#4
davew
Posted 03-06-2012 08:53 AM

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even easier way, 94-97 have a passenger side airbag, 90-93 does not.

Virtually everything on the motor is different:
Injectors
motor mount brackets
starter
alternator
heads
cams
pistons
manifolds
etc.

Other than some hardware, the only interchangable part would be the connecting rods. Same from 90-05

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#5
Keith Novak
Posted 03-06-2012 09:12 AM

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If someone really wanted to hide a swap, it would be difficult to detect. They do have vin numbers all over the place. In addition to engine stuff and dash, the suspension bracing is a bit different, there might be tell tale signs of the ECU relocation etc. If someone really wanted to do a swap and make it invisible, I'm sure it would be possible but they'd probably discover it would be half as much work to just get a NB tub and start over.
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#6
Jim Drago
Posted 03-06-2012 11:22 AM

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There are many cars that needed to be re-tubbed etc that have the "wrong" year tub. If you meet the requirements on VIN number to your spec line, you meet the requirements.

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#7
DrDomm
Posted 03-09-2012 08:22 AM

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What about suspension pieces, like control arms, hubs/spindles, steering, axles, etc? Transmission? Brakes?

Are the parts interchangeable?
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