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Old 03-23-2012, 06:25 PM   #14
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Originally Posted by itbparada View Post
sorry should have specified a little more... durring idle it will bounce from 12-18:1, when motor is cold it pins lean and idles with a lope until i tap the gas... then it evens out most of the time(normally bounces 15-17), anything more than part throttle load/cruise it shoots strait to lean 20+ : 1.. fyi - still havent gotten into more than 1-2psi of boost

Tom-what do you file your ring end-end gap to on the top two rings for boosted applications?
I would check that tune good it could be part of the issue

As for the rings .004 to .0045 x bore on the top ring and .005 to .0055 on the second ring x bore depending on what level of boost and performance and its very important to have the ring square with the deck , you can use one of the old pistons with all but the second ring off to pust the rings square in the bore , some know this but adding it for others that dont

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