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Just after some advice on piston ring gap.
I am using Manley 85.5mm pistons for my 4G63 build. Goal is to run 400-450kw atw with FP Black or GTX3576. It'll be mostly street driven and occasional track days.
This sheet was included with piston ring gap recommendations from Manley.
Which application would I suit best? I noticed that Manley recommends top and second to have the same gap. However, second ring is normally larger than top ring according to other manufacturers. What would you recommend?
With my own experience with the 4G63 I'd actually be inclined to be around 0.0050" for the top ring and 0.0055" for the second. It seems that Manley are a little conservative on their spec sheet which is understandable.