Hi guys,

I had a really easy question and also one hard/weird question.

My first question which I am almost certain I know the answer to is this:

How is a B series cable tranny operated? when the clutch pedal is stepped on, it pulls on a lever that is located on the tranny housing right?

Now my next question which may sound kind of weird is this:

How much lifting force is required to operate the lever on the tranny housing itself? say if I was to attach a steel cable or chain directly to the lever and tried to operate it by hand would it be like trying to lift a 50 lb weight, a 100 lb weight or a 500 lb weight?

I know it's a really weird question, but hopefully someone knows the answer.

TIA

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by BlueShadow &raquo;</TD></TR><TR><TD CLASS="quote">How is a B series cable tranny operated? when the clutch pedal is stepped on, it pulls on a lever that is located on the tranny housing right?
</TD></TR></TABLE>

correct

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by BlueShadow &raquo;</TD></TR><TR><TD CLASS="quote">How much lifting force is required to operate the lever on the tranny housing itself? say if I was to attach a steel cable or chain directly to the lever and tried to operate it by hand would it be like trying to lift a 50 lb weight, a 100 lb weight or a 500 lb weight?</TD></TR></TABLE>

that would most likely depend on the spring force of the pressure plate currently installed (it's pretty easy to do with the clutch pedal because of the mechanical advantage)

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by the DR. &raquo;</TD></TR><TR><TD CLASS="quote">correct

that would most likely depend on the spring force of the pressure plate currently installed (it's pretty easy to do with the clutch pedal because of the mechanical advantage)</TD></TR></TABLE>

Yup, I figured that due to its design the pedal would increase the amount of torque/force to the correct amount required to operate the transmission lever.

But if is there anyway to guess at how much pulling force is needed to move the tranny lever? lets use a Y1 tranny as an example with a OEM PP, and for another example we'll say the same Y1 tranny but with an ACT street setup.

 

I'm too lazy to measure my clutch pedal, besides it's got a hydraulic clutch. So here what you can do...

Measure the distance from the clutch pedal pivot to the pad where your foot goes; call that distance A. Measure the distance from the pivot to the place where the cable attaches; call that B. Now divide: A divided by B is the mechanical advantage of the clutch pedal.

Now estimate whatever force you need to press the clutch pedal (40 lb??) Multiply that by the mechanical advantage (5??) So for my wild guess at the numbers, you need 40 x 5 or 200 lb of force to move the clutch fork.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by JimBlake &raquo;</TD></TR><TR><TD CLASS="quote">I'm too lazy to measure my clutch pedal, besides it's got a hydraulic clutch. So here what you can do...

Measure the distance from the clutch pedal pivot to the pad where your foot goes; call that distance A. Measure the distance from the pivot to the place where the cable attaches; call that B. Now divide: A divided by B is the mechanical advantage of the clutch pedal.

Now estimate whatever force you need to press the clutch pedal (40 lb??) Multiply that by the mechanical advantage (5??) So for my wild guess at the numbers, you need 40 x 5 or 200 lb of force to move the clutch fork.</TD></TR></TABLE>

Cool!!! thanks for the tip. I'll use that formula, and I'll also see if I can find the lever on the tranny and see if I can move it by hand.