Quote:
Originally Posted by Rob Doe
lyle: you might benefit from this Youtube video:
Balance your Model A flywheel at Home!
The portion of interest starts at ~ 14 minutes in. George mentions the relationship of the range of pedal movement as it relates to the range of the pressure plate finger movements. He is discussing the stock Model A setup, but it applies to the non stock, customization of using a modified flywheel dimension along with a V8 pressure plate.
I've read that the collar on the end of the pedal shaft is not the sole player in the travel of the clutch pedal. A senior guru stated that the upper floorboard had a role in limiting that travel. I believe this is true of our coupe's functioning and a friend's coupe with a stock setup. Without the floorboard, the pedal goes all the way to the firewall metal. This may be further than with the upper board installed. Just a thought.
Our coupe's functioning, with new Bratton's clutch disc measuring ~.375-.380 thickness with the used V8 pressure plate required additional free play at the top of the pedal to work correctly. When I had it at 3/4" free play, I had the same result that you had, and I could watch it happening via the inspection window.
I'll be interested in your experiment moving the pressure plate farther away from the flywheel. I suspect that you will simply diminish the pressure that the pressure plate exerts on the clutch disc when the pedal is at the top of its range. A stock setup exerts 1200 pounds.
I don't have enough experience to speak with any authority, but in IMHO, I'm thinking that the proper operation of your setup will require a proper adjustment of the free play. In other words setting the max forward position of the throw out bearing in the correct position of the min and max travel of the pressure plate fingers.
I'll be learning with you as you report your findings. Luck to ya.
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not sure how much pressure is exerted on the clutch plate with the change I made, but since the springs that push the pressure plate are pre-loaded, I do not think that the pressure is changed significantly. The washers I used were 0.069" thick by the way...
I bought more washers than needed, then checked thickness of each one to make sure they were all within 0.001" -- most of them were and so not much sorting was required...(the washers were from Lowes btw).