I would go for the mx5 mate, s12's and s13's have ca18det engines in them Not true mate. The s12 runs a ca18et not the ca18det. Only a single cam but bullet proof engine. The det has a chocolate bottom end. Not Wrong there Ned ! i know im on my second engine, not sure how long it will last! if not ...
Wobble at that speed I would most definitely put down to wheel balancing. I'd get whoever fitted the tyres to check it again. It may be something simple like the machine on the wrong setting for the distribution of the wheel weights, easily done, as different types of wheel require the weights in di...