Pre 99 1.8 shortblock compatible with 99-00 shortblock - Miata Turbo Forum - Boost cars, acquire cats.

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Old 11-16-2011, 12:34 PM   #1
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Default Pre 99 1.8 shortblock compatible with 99-00 shortblock

My 2000 miata motor is done, truthfully I have had enough with this motor problems and want to start with a new one. I got a rebuilt 99 head and have the opportunity to pick up a pre 99-00 1.8 shortblock. I will be replacing the pistons and bearings with OEM stuff and maybe the rods too but will be keeping the crank.

What are the differences in the block n crank? Should I order the 99-00 pistons to achieve the 9.5:1 the later motors have?

What other issues will I run into. Its going to be a daily driver so not looking for mega horsepower build.

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Old 11-16-2011, 04:16 PM   #2
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Block and crank are the same, except the early 1.8 blocks have the oil feed port on the drivers side.

Yes, order the 99-00 pistons if you want 99-00 compression ratio.
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