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-   -   When does one need pistons? (https://www.miataturbo.net/engine-performance-56/when-does-one-need-pistons-104850/)

GeorgePatches Apr 2, 2021 11:39 AM

Perfect, that's what I wanted to know. Just what the options are without going full custom $$$$. Seems like all the forged, low-comp pistons require an overbore, anything off the shelf that fits a standard bore?

DNMakinson Apr 2, 2021 07:43 PM

The ones you have (1994) are 8.8:1. Close enough.

DNM

SpartanSV Apr 3, 2021 04:59 PM

CP offers forged pistons for a stock bore down to 9:1. Total waste for your goals though.

Why do you want 8:1 pistons? Are you trying to drop compression as much as possible so you can run 87 octane?

GeorgePatches Apr 4, 2021 10:48 PM


Originally Posted by SpartanSV (Post 1596897)
CP offers forged pistons for a stock bore down to 9:1. Total waste for your goals though.

Why do you want 8:1 pistons? Are you trying to drop compression as much as possible so you can run 87 octane?

The thought had crossed my mind, I like weird goals like that.

Also, I come from the world of small block chevies where you can get any piston, for any bore, in any CC you want off the shelf. I realize the parts availability is probably not that versatile, but I'm just curious what the options are.


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