I ended up going for a fully built n/a 1.8 mazda engine in my car. Nothing compared to a K20 but then I am running in a production class at the moment.
Later in the year I'm putting a Rotrex on the engine which should bring the power levels up a bit.
In terms of K20 / K24 in an MX5, costs really range from around $7k upwards depending on how much stuff you want to make yourself. Still it's not bad, given you can purchase a fairly tidy NA6 for $3-4k. The total package I believe would make a very nice road / race car with good balance and power.

 
			
 
			
			 
					
					
					
					
				 Originally Posted by RenzokukenJ
 Originally Posted by RenzokukenJ
					

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