Miata Turbo Forum - Boost cars, acquire cats.

Quote:

Originally Posted by TurboTim (Post 1504929)

Sleeves make more sense to me cause you can change them when something bad happens, but as I understand it the real high end blocks are typically some sort of sprayed on liner.

I know sleeves have their place in the world and if properly engineered may be okay for certain applications. Sometimes they can even help overcome some poor engine design features (like really thin walls on overbores) when pushing boundaries of the performance envelope. But in my mind its yet another variable that has to be managed due to dissimilar metals, coefficients of thermal expansion, etc. I'm with hi_im_sean. I'd much rather have a Nikasil lined cylinder (or viable alternative depending on the exact metallurgy of the casting).