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Thread: Opti rebuild

  1. #31
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    Quote Originally Posted by scc82 View Post
    we rebuild optis a lot, at least one a week in the shop. Everyone that comes apart is completely soaked with oil. They don't have oil problems. You have to remember that there is no fuel running through the motor and past the crank and rods to wash oil off like a carb or efi motor. When we pull a crank out it is actually dripping with oil. I would say they oil better then a conventional motor at least on the crank side. Jmo.
    Stan carson.
    Hi Stan

    whats the most common cause of a dead opti?

    Regards

  2. #32
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    Same as carb.... The opti goes popty......because lean out.......injectors.....maybe #6 as lowest gets the trash........I don't know.........move along theres nothing to see here.......stormtrooper.....

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  4. #33
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    Our rev limiter is @ 8500 regardless if it's in break in mode or not. Our first year with this motor we broke a piston skirt at about 45 hr. And then we find out you need to replace them every 40 hr. We seen no sign of over oiling. Maybe the opti becomes a hole new engine @8500 rpms. So maybe I'm in the wrong thread. Is there a opti racing thread?

  5. #34
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    Failure on number 6 is often a cold seize. 6 is the first cylinder to get the cold cooling water and if you get a thermostat hung open bad things happen.

  6. #35
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    Optis do not limit power when they are in break in. The only limitation would be from the extra oil causing it to run rich. The DFI oil will make it last longer than the Premium Plus.

  7. #36
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    Correct me if I'm wrong. I don't see how it can run rich when the oil never mixes with the gas.

  8. #37
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    It doesen't. But the crankcase compression pushes it through the transfer ports. That's why they smoke more and carbon the plugs during break in. I don't think it would effect performance much if at all.

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