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Does anyone have experience with Manley piston ring gap? Apparently Manley uses Total Seal piston rings in their kits.
I am using Manley 85.5mm pistons. Goal is to run 500-550hp atw with FP Black. It'll be mostly street driven and occasional track days.
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 to reduce ring flutter. I was suggested to go with High Boost 30lb+ application. However, 0.008" per bore inch seems a bit too excessive? I'm abit confused as Manley's/Total Seal's guidelines are really different to others. What would you recommend?
Second gap larger, you don't want a higher pressure between the rings than above or below them. I don't remember off the top of my head what I set mine at but I know the second ring was somewhere around the .027" area, it's not unreasonable at all.
Best way to look at it is like this, you set em a tad loose and have a little bit extra blowby, or you set them a bit too tight and have to rebuild the motor.
That's yuge for the top ring (the .008" per inch of bore). You'll be fine with .018" top and .024"-.028" bottom. The bottom isn't really as crucial, you want whatever gets past the top ring to be able to get out. Just make sure all the top rings are within a thou of each other.
At the same time, rings don't really have blow by issues until the gap gets too big to measure with a feeler gauge set, so, it's kinda up to you...
Last edited by letsgetthisdone; Dec 21, 2018 at 08:21 AM.
Dec 20, 2018, 11:25 PM
