Forced Induction Custom FI Setup Questions

some ?'s about compression results..

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Old 03-26-2006, 04:52 PM
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Default some ?'s about compression results..

visited the track last night and friends noticed some blue smoke from exhaust during burnout and through 1st/2nd gear. when i got home there was tons of smoke from the exhaust and also noticed a good amount of oil from the valve cover breather,enough oil that it started to run down the tranny. then figured some rings were broken, did a comp. test today and here are the results... d16y8
#4---210
#3---180
#2---180
#1---155

would these results still point to broken rings? also my new oil return had a very slight upward slope which may of caused the blue smoke but not the oil from the breather, thanks for any suggestions or comments..

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Old 03-26-2006, 06:52 PM
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Default Re: some ?'s about compression results..

Really, those numbers are kind of high for a D, but my guess would be cylinder #1 is pooped. I think you can fill it up with oil though or something? Dude, I don't know though for sure. Wait for someone with expierence rather than hearsay.


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Old 03-26-2006, 11:12 PM
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Default Re: some ?'s about compression results..

anybody with some knowledge?
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Old 03-26-2006, 11:14 PM
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Default Re: some ?'s about compression results..

210 psi is about 10:1 C/R ish, 155 dose seem low for a y8 dose it smoke a lot or blow oil out the valve cover breather?
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Old 03-27-2006, 02:28 PM
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Default Re: some ?'s about compression results..

first if i were you id run a compression test again, but put a teaspoon of oil in #1, if it goes up to 180+ theres your problem(bad ring) but if it stays the same i would look at getting a oil catch can to release some positve charge from the bottom side of the crank, or take a look at maybe a bad valve seal or something it can be lots, just start from the compression test and work your way down.
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