Quote:
Originally Posted by davidimurray
Fuel injected - likely to require cat which can be difficult to package and to get to 'light' correctly for emissions testing. also can be more difficult to tune/setup due to ECU - i'm not sure what the MX5 setup is.
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You will only need a cat if your engine is from 1995 on (August or September 1995 IIRC, but not 100% sure). That means all the 1.6 'short nose' crank lumps and early 1.8s would not need a cat. There is plenty of tuning knowledge and several options wrt ECU choice and set-up if you do modify the lump.
When I was searching for a donor, I found that the price difference on the open market between a Sierra and a MX-5/Eunos Roadster was negligible.
Lots of the unusable parts on a MX-5 can be sold for good money if they are in good enough condition, especially if you buy one with a hard top or if it has certain JDM parts fitted. The standard MX-5 alloys are also very light weight; you would have to spend a lot of money on getting lighter aftermarket alloys.