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Compression ratio and tuning
I have an '87 z31 turbo. Mostly stock aside from a turbo timer and manual boost controller. Looking to rebuild the engine, replace the timing chain, water pump, and all seals. Considering increasing compression while I'm at it with new pistons. Thinking 9.5:1 or 10:1. After a compression increase should I have the ecu tuned or will adjusting timing be enough? Sorry if it's a dumb question. I'm fairly certain it needs to be tuned. If so I'll hold off until I can put a Nistune in. Any replies are greatly appreciated.
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