Low compression - valve adjustment? - Zenith Aircraft Builders and Flyers2024-03-29T01:16:05Zhttps://zenith.aero/forum/topics/low-compression-valve-adjustment?commentId=2606393%3AComment%3A641871&feed=yes&xn_auth=noHi Ken,
Thanks, I'll try tha…tag:zenith.aero,2018-08-17:2606393:Comment:6421622018-08-17T03:20:50.629ZDale Waltershttps://zenith.aero/profile/DaleWalters
<p>Hi Ken,</p>
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<p>Thanks, I'll try that this weekend. I'm not sure if valve rotators are installed or not.</p>
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<p>Yes, I'm running 100LL. I didn't know about the need to run Decalin until about 16 hours ago, which I'm sure is why the lead deposits formed. I've been in communication with Dan at SPA today.</p>
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<p>I'm not sure how many HP I'm getting; that is what I was told by the builder.</p>
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<p>Thanks</p>
<p>Dale</p>
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<p>Hi Ken,</p>
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<p>Thanks, I'll try that this weekend. I'm not sure if valve rotators are installed or not.</p>
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<p>Yes, I'm running 100LL. I didn't know about the need to run Decalin until about 16 hours ago, which I'm sure is why the lead deposits formed. I've been in communication with Dan at SPA today.</p>
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<p>I'm not sure how many HP I'm getting; that is what I was told by the builder.</p>
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<p>Thanks</p>
<p>Dale</p>
<p></p> You can try staking the valve…tag:zenith.aero,2018-08-16:2606393:Comment:6415412018-08-16T23:19:30.934ZKen Pavlouhttps://zenith.aero/profile/KenPavlou
<p>You can try staking the valves and see if that breaks up any deposits the valve may be hanging on. Do you have exhaust valve rotators installed? If you're running 100LL are you using a lead scavenger additive? I strongly suggest Decalin runup if running 100LL You can find it at ACS <a href="http://www.aircraftspruce.com/catalog/appages/Decalin.php" rel="nofollow noopener" target="_blank">http://www.aircraftspruce.com/catalog/appages/Decalin.php</a> The Decalin works very well in…</p>
<p>You can try staking the valves and see if that breaks up any deposits the valve may be hanging on. Do you have exhaust valve rotators installed? If you're running 100LL are you using a lead scavenger additive? I strongly suggest Decalin runup if running 100LL You can find it at ACS <a rel="nofollow noopener" href="http://www.aircraftspruce.com/catalog/appages/Decalin.php" target="_blank">http://www.aircraftspruce.com/catalog/appages/Decalin.php</a> The Decalin works very well in preventing hard lead deposits. If you decide to go ahead with a valve job I highly suggest contacting Dan and Rachel at Sport Performance Aviation <a rel="nofollow noopener" href="https://flywithspa.com/corvair/" target="_blank">https://flywithspa.com/corvair/</a></p>
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<p>Lastly, if you're getting 130 HP out of your 3000 cc corvair let me in on your secret because my 3.3 L stroker is only rated 125 HP at 3300 RPM.</p>
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<p>Good luck,</p>
<p>Ken Pavlou</p>
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<p></p> Thanks. Looks like I may nee…tag:zenith.aero,2018-08-16:2606393:Comment:6418712018-08-16T18:42:32.090ZDale Waltershttps://zenith.aero/profile/DaleWalters
<p>Thanks. Looks like I may need to get the valve job done</p>
<p>Thanks. Looks like I may need to get the valve job done</p> Hydraulic lifters in a Corvai…tag:zenith.aero,2018-08-16:2606393:Comment:6416452018-08-16T17:21:30.868ZJohn Edwardshttps://zenith.aero/profile/JohnEdwards
<p>Hydraulic lifters in a Corvair Never need adjusting.</p>
<p>Hydraulic lifters in a Corvair Never need adjusting.</p>