IcantDo55

iTrader: (11)

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.

Thanks.

crashnscar

iTrader: (9)

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.