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04-17-2017, 07:50 AM | #21 |
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Re: Sputter at high RPMs
Model A valve train is NOT a good design, for HIGH RPMs.
Bill Slowly
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04-17-2017, 07:58 AM | #22 |
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Re: Sputter at high RPMs
The car isn't undrivable, it does very well at a moderate RPM range. Perhaps it will get better in time? I'll put some MMO in the gas to keep the valves lubricated and hopefully it will gradually get better. A very experienced club member keeps stressing to try a dofferent distributor just to see if that helps at all, which I will just to eliminate that also. But I do really feel it's that valve or valve springs. If it persists, I'll change the springs.
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04-17-2017, 07:06 PM | #23 |
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Re: Sputter at high RPMs
Can you change valve springs with the head on?
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04-17-2017, 07:54 PM | #24 |
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Re: Sputter at high RPMs
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04-17-2017, 08:25 PM | #25 |
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Re: Sputter at high RPMs
Without knowing the condition of your distributor and maybe the replacement, sounds like someone playing a guessing game and shooting off ideas. Unless the other distributor is brought back to factory, including where the upper plate rotates on the center with new cam/shaft/bushings and body to rotor air gap is set, why bother.
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04-17-2017, 11:23 PM | #26 |
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Re: Sputter at high RPMs
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Were all of the valves and lifters returned (in matched pairs) to their original positions? If not that would explain the clearances being "All over the place". Last edited by Benson; 04-21-2017 at 04:52 PM. |
04-18-2017, 12:17 AM | #27 |
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Re: Sputter at high RPMs
Everything was labeled and placed back exactly where they came out.
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04-18-2017, 05:27 AM | #28 |
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Re: Sputter at high RPMs
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04-18-2017, 07:28 AM | #29 |
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Re: Sputter at high RPMs
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04-21-2017, 02:15 PM | #30 |
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Re: Sputter at high RPMs
Nobody suggested a condenser. Tried a new condenser, solved the problem entirely.
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04-21-2017, 03:00 PM | #31 |
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Re: Sputter at high RPMs
Glade you figured it out, way to go young man! I would have thought good or bad not intermittent.
Soon you will be an expert, and we will ask for your help :-) Last edited by Big hammer; 04-21-2017 at 03:03 PM. Reason: Addition |
04-21-2017, 03:06 PM | #32 |
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Re: Sputter at high RPMs
The spring assembly that is attached to the movable points in the distributor can get weak and not able to close the points at high speed. It can also be in a position that it can short out temporarily at high speed.
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