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Author Topic: Ring gaps D16  (Read 5057 times)

walter

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Ring gaps D16
« on: August 05, 2012, 03:56:52 PM »
HI guys, im building a Z6 w/ P29 pistons. new pistons/rings, gasket blabla, ok, my question is about ring gaps, checked and all are in oem specs, 0.30mm first, not sure if to "open" a bit more , it will be used too for road racing (track days).

Thanks.

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Foowee

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Re: Ring gaps D16
« Reply #1 on: August 06, 2012, 03:14:10 PM »
A little extra room will not hurt it.  Clearance is room to make power. 
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crxvtec91

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Re: Ring gaps D16
« Reply #2 on: August 07, 2012, 03:13:18 PM »
On turbo motors I run .018 top ring, and .019 on the second ring, leave the oil control rings alone.
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92CXyD

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Re: Ring gaps D16
« Reply #3 on: August 07, 2012, 03:52:07 PM »
Quote from: crxvtec91 on August 07, 2012, 03:13:18 PM
On turbo motors I run .018 top ring, and .019 on the second ring, leave the oil control rings alone.

+1  :noel:
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walter

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Re: Ring gaps D16
« Reply #4 on: August 07, 2012, 04:38:48 PM »
this is na  :-*.

i think i will leave it in 0.30mm/ .012
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HiProfile

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Re: Ring gaps D16
« Reply #5 on: August 08, 2012, 12:15:11 AM »
Ring gap should be increased with heat. High compression/timing will want a bit more gap.

A gap that's slightly too large will only loose a cunt hair of power, but mostly just increase blowby. The increased crankcase gasses lead to a slightly shorter oil change interval. A gap that's too small will bind the rings, ruin your ring seal (permanently), and worst case crack rings and even ringlands.
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walter

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Re: Ring gaps D16
« Reply #6 on: August 09, 2012, 03:21:20 PM »
yes, i know that, but important thing is to know how much will expand when engine is hot. i think i will open a bit more the top rings since car will be used too for road racing sometimes.

Thanks for replies!
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