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Old 07 November 2013, 05:32 PM
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stockdalep
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Default Ring Gap P1

Hi

I am building my P1 back to a stock engine using the old pistons with new NPR piston rings.

My old 1st and second ring gaps are both 0.30 ~ 0.40

The NPR rings are measuring 1st ring 0.25 ~ 0.30 2nd ring 0.45 ~ 0.50

Does this seem right ?

The car had covered a mere 22,000 miles
Thank for any help.

Last edited by stockdalep; 07 November 2013 at 07:08 PM.
Old 07 November 2013, 10:12 PM
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merlin24
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The Standard spec for the P1/ STi Vers 5~6 ring gaps with the HF forged pistons are :
1st - 0.20~0.26mm
2nd ~ 0.20~0.50mm

NPR manufacture the OEM subaru rings BTW.


Mick
Old 08 November 2013, 12:49 AM
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bighead
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Mick strikes again !! ...walking Subaru encyclopedia
Old 08 November 2013, 06:16 AM
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stockdalep
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Thanks Again for the help
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