i have a mini me y7block/y8 head, so the compression ratio is already a little higher, but i was wondering what are the disadvantages to increasing CR even more?

Do i need to do anything to prep for higher CR?

Detonation: if this is the main concern, do you have to dyno to prevent this or can you garage tune it and successfully avoid it?

Is there a limit that id want to avoid (CR)?

I saw on ebay some pistons for the ZC that would increase my compression a bit more than current setup, the price was reasonable so i ve started to wonder about CR.
they were specifically: 75mm p29 High Compression dome Pistons made by NPR in Japan.
says also: D16Y7/8 Block and Head get a CR of 12.89:1 with these..


also i have a dc sports 4-1 header, a cheap intake and a lightened flywheel/clutch.

(im not interested in putting a turbo on this engine ever, so i realize if i were wanting that, i d want to get a lower CR...)

Purpose of a switch like this: to learn more about my engine, to get a bit faster acceleration (pretty good now), and thats about all...

Also, im bitten by the swap bug like everyone else, but at the moment im not goin that route, i need to buy a house first. A b16 or b18 will have to wait. Though once i get one i will probly want to do some CR alterations as well.