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SN95 Cobras
New built motor issues - compression test numbers inside
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<blockquote data-quote="SVT GI" data-source="post: 16579507" data-attributes="member: 81611"><p>Blow by is your rings, more than likely ring gaps. Personally, I feel the ring manufactures gap specs are on the loose side, I start with their specs and drop down a couple thousands. Put a vented catch can in.</p><p></p><p>compression tests look normal. There’s too many variables that affect tests. Cams, timing, test done cold or warm, wet or dry. Those numbers aren’t going to make your feel low on power. Neither will the valve guides or seals. It’s either in the tune or combination or parts used ie, cams, intake, hot side size, down pipe size, intake temps, etc.</p><p></p><p>smoke out the exhaust could be valve seals or guides. But if the shop feels confident it isn’t, it could also be over oil pressure to turbo. Rpms go up, so does oil pressure. Might need to put in an oil feed restrictor, or a smaller one if already have one. Different turbo brands seem to like different oil pressure without blowing through the seal.</p></blockquote><p></p>
[QUOTE="SVT GI, post: 16579507, member: 81611"] Blow by is your rings, more than likely ring gaps. Personally, I feel the ring manufactures gap specs are on the loose side, I start with their specs and drop down a couple thousands. Put a vented catch can in. compression tests look normal. There’s too many variables that affect tests. Cams, timing, test done cold or warm, wet or dry. Those numbers aren’t going to make your feel low on power. Neither will the valve guides or seals. It’s either in the tune or combination or parts used ie, cams, intake, hot side size, down pipe size, intake temps, etc. smoke out the exhaust could be valve seals or guides. But if the shop feels confident it isn’t, it could also be over oil pressure to turbo. Rpms go up, so does oil pressure. Might need to put in an oil feed restrictor, or a smaller one if already have one. Different turbo brands seem to like different oil pressure without blowing through the seal. [/QUOTE]
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New built motor issues - compression test numbers inside
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