Broken driveshafts and clutch story
Discussion
Having built myself many race cars with bike engines, I have always paid attention to the clutch pedal ratio. Bike engine are designed with a multi-disc
clutch wich can be released by two fingers with a fairly small master cylinder. For same reason, many cars builders are using standard race pedals sets
where the clutch pedal has a ratio around 5 to 1. This mean that even using the smallest available master cylinder available (9/16), you are actually
engaging the clutch on a ridiculous short pedal displacement (1/4 in) with the risk of damaging the clutch system within the engine with a too long stroke therefore requiring a pedal stop. Now if Radical would look into this and build a clutch pedal with at least 10 to 1 ratio, the clutch engagement would be a lot more manageable making it a breeze to get the car on the way and most certainly saving a lot of money on broken driveshafts.
The only drawback is a very light pedal where the weight of your feet may get the clutch to slip. I have correctd this with using a spring returning the clutch pedal.
I have modified my clubsport pedal ratio by welding a dovel lower into the pedal and using a bend clutch actuator rod. This is not ideal as I am pushing
slightly sideways into the master cylinder but with the very low pressure involved, I will be very old before we can see some wear into the master cylinder.
Anybody interested with the modification can email me at "traeng@bluewin.ch"and I will send the drawing of the pedal mods.
I wish you guys plenty of great racing
Dan
clutch wich can be released by two fingers with a fairly small master cylinder. For same reason, many cars builders are using standard race pedals sets
where the clutch pedal has a ratio around 5 to 1. This mean that even using the smallest available master cylinder available (9/16), you are actually
engaging the clutch on a ridiculous short pedal displacement (1/4 in) with the risk of damaging the clutch system within the engine with a too long stroke therefore requiring a pedal stop. Now if Radical would look into this and build a clutch pedal with at least 10 to 1 ratio, the clutch engagement would be a lot more manageable making it a breeze to get the car on the way and most certainly saving a lot of money on broken driveshafts.
The only drawback is a very light pedal where the weight of your feet may get the clutch to slip. I have correctd this with using a spring returning the clutch pedal.
I have modified my clubsport pedal ratio by welding a dovel lower into the pedal and using a bend clutch actuator rod. This is not ideal as I am pushing
slightly sideways into the master cylinder but with the very low pressure involved, I will be very old before we can see some wear into the master cylinder.
Anybody interested with the modification can email me at "traeng@bluewin.ch"and I will send the drawing of the pedal mods.
I wish you guys plenty of great racing
Dan
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