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Thread: Tuning help needed - '91 TBI 383 w/ Vortec heads

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  1. #19
    Fuel Injected!
    Join Date
    Jan 2017
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    411
    Quote Originally Posted by donf View Post
    Sounds like a good plan. I use to work in front of a machine shop. I had to do their R&R's sometimes when things went wrong. The big thing that got them over and over was hone grit. They would get in a hurry and just hone it with what ever they thought was standard. Different brands and ring types will tell you what grit to hone the cylinders. As far as beating on it, vs not I really don't think that makes the difference compared to having a machinist who reads and follows the ring manufactures instructions. Some cylinder pressure behind the rings though will push them out against the walls harder. I do think if your rings have not fully seated, switching to conventional oil may help. It doesn't even have to be the good stuff if you do not have a flat tappet cam. If it does, one with zinc will help.
    What he said to seat rings...wind it up and let the compression slow the vehicle down repeat like a dozen or so times.
    Last edited by stew86MCSS396; 05-18-2019 at 05:41 AM.

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