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390 exhaust leak or stuck lifter? |
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limachine
AMC Apprentice Joined: Apr/02/2009 Location: Long Island Status: Offline Points: 151 |
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Yeah, the roller tips will quiet down above 1500 rpm or so. I also had a problem with Chinese lifters. I built my engine with an old stock Crane hydraulic cam, so went with their lifters. 3 of them would intermittently clack away until they felt like working again. So I swapped them out for Comp Cams, and had more problems with collapsing. A little research turned up the majority of the good old brands were being made overseas by the same foreign company with crappy materials and incorrect specs. The only American made brands were Jessel and Isky. I swapped in the Iskys and had better results. After all that, I went solid with Edelbrock heads. What a difference!
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Boris Badanov
AMC Addicted Joined: Dec/14/2013 Location: NH USA Status: Offline Points: 4209 |
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Exhaust.
Sounds like you have headers and a leak. |
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Gremlin Dreams
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