Transmission mounts / clutch stuff

All I know is........it eff'n works.

And I don't need Archimedes' great Aunt Cassiopeia to tell me how.

I'm OK with that.

You have just proved my point, Ray. Please go back and read my post about a rope tied up in a tree. The rope then goes down to a pulley with a load attached to it and there is a person back up in the tree pulley on the loose end of the rope.

If the load weighs 100 lbs. , the person will only have to pull with 50 lbs of force to lift it.

Please refer to the first diagram in your "how stuff works" reference. No one has mentioned anything in any post about a scenario like that. Period. I agree with that diagram. One for one effort / gain and no mechanical advantage

Now please go to diagram number two and try to convert the first part of it ( left side ) to what this discussion is about and that is gaining a two to one advantage by having a pulley attached to the upper end of the clutch release lever and the clutch cable itself going through that pulley and on to a fixed attachment on the side or the transmission case positioned towards the front of the car relative to the

clutch release lever. 

In diagram two, in the upper left there is a cable tied to a fixed loop. Imagine that is the fixed attachment on the side of the transmission case. The 100 lb. block with a pulley attached to it would be the pulley you attach to the top of the clutch release lever. Now follow that cable coming out of the pulley on the diagram and imagine that cable is your clutch cable going all the way forward to the clutch pedal. Forget the rest of the diagram....it's all irrelevant. Can you see the 2:1 mechanical advantage we've been talking about ?

David, if you have two pulleys for sure you get 1/2 the force needed. 

The effort required to move the weight is reduced if the pulley is moving.  I just haven't been able to wrap my head around where in our vehicle's clutch system is a moveable pulley.  The parts I saw referenced on The Samba appeared to have one end that is bolted to a fixed point with a pulley on the other.

I'll admit my newbie-ness to the whole system which adds to my inability to picture this.

There is no pulley in a stock system.

But for the system described here, the one end of the cable is fixed to the transmission. The pulley is fixed to the clutch arm on the transmission which represents the moving load. The other end of the cable is attached to the clutch pedal and represents the force required to move the load.

Because the single pulley is attached to the load and moves with it, the load is effectively being supported by two lengths of cable (trans-to-pulley and pedal-to-pulley). If the load was 10lbs, 5lbs of that gets supported by the trans-to-pulley cable and 5lbs gets supported by the pedal-to-pulley cable. Because your foot only interacts with the pedal-to-pulley cable, it only takes 5lbs of pedal effort to move the 10lb clutch.

The downside is it takes twice as much pedal travel.

Pulley diameter has no effect on this setup except that it needs to be large enough to accommodate the minimum bend radius of the cable.

Excellent, Justin. And nicely explained, as usual.

I did say earlier that pulley diameter comes into the mechanical advantage process and that was wrong.

No, Ray. It doesn't work that way. Please re-read my explanation one more time and then  review Justin's analogy. I'm right this time and Justin is right all the time.  I can't describe it to you any better. I give up.

Stan is issuing cards, lol  

Now I understand where the MOVING pulley is. Thanks.

If a train leaves the station heading West at 40 mph….

and the ticket costs three times as much as the ticket on the train heading East from LA . . .