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Short Throttle Action Using R1 And Mini Pedal


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#1 YIANO

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Posted 12 December 2008 - 03:50 AM

i hooked up the throttle pedal last night and was slightly concerned when i realised i have only about half the pedal travel i used to have , so is anyone using a pedal extension/alternative or any advice on whether this is an issue
cheers

#2 alexcrosse

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Posted 12 December 2008 - 07:59 AM

thats as it is, but put a stopper on your pedal so it is stopping against a bolt on the floor or something rather than the cable, or you will snap it.

#3 Monte Busa

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Posted 12 December 2008 - 06:22 PM

I agree - you need a pedal travel limiter (I can take a picture of how I did mine and post it), but the action is not that bad - I actualy drilled a hole a bit below the normal cable attachment pt to increase the pedal travel a bit....


thats as it is, but put a stopper on your pedal so it is stopping against a bolt on the floor or something rather than the cable, or you will snap it.



#4 roofless

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Posted 12 December 2008 - 08:18 PM

:kiss: nope - mine travels just the same as before?? I'm injection - maybe that makes a difference?

#5 Monte Busa

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Posted 12 December 2008 - 09:41 PM

Mine's injection (2003) and the pedal travel is about 1/2 of a normal Mini setup

:kiss: nope - mine travels just the same as before?? I'm injection - maybe that makes a difference?



#6 roofless

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Posted 12 December 2008 - 09:48 PM

Mine's injection (2003) and the pedal travel is about 1/2 of a normal Mini setup

:kiss: nope - mine travels just the same as before?? I'm injection - maybe that makes a difference?


that really is bizarre - I'm pretty sure we did nothing special and we have full travel - its absolutely spot on. :) I'll ask John in the morning.......

#7 alexcrosse

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Posted 12 December 2008 - 10:02 PM

i drilled a hole in the floor in the same angle as the pedal travel, then put a bolt through so i could adjust it.

#8 Monte Busa

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Posted 13 December 2008 - 01:35 AM

That's what I did too

i drilled a hole in the floor in the same angle as the pedal travel, then put a bolt through so i could adjust it.



#9 miniSLO

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Posted 13 December 2008 - 10:06 AM

That's what I did too

i drilled a hole in the floor in the same angle as the pedal travel, then put a bolt through so i could adjust it.


Just drill a hole 1 inch below original hole on the pedal, and adjust the throttle cable to the point when pedal will hit the floor

#10 YIANO

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Posted 14 December 2008 - 03:47 AM

its the actual cable throw thats an issue, due to the throttle being sensitive on a bike and mounted via a twist grip ,the cars pedal in its standard setup moves too much cable at once hence you end up with about half the required travel to open the throttle fully.
the sensible solution for me is to remove the pedal assembly from the car and carfully drill another 2.5mm hole about 40mm down from the existing hole .This will then cause greater pedal travel to open the throttle and should sort the problem giving me complete pedal travel when the throttle is open fully.

done it ! drilled another hole 40mm lower than the original and pedal travel has increased to about 80%
i might drill another hole and try again or just fit a stop to prevent cable breakages

#11 Monte Busa

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Posted 14 December 2008 - 03:55 AM

I did mine lower only 20mm or so, and when I fitted a travel stop, it seems fine to me - a bit sharp, but workable. I personally think the std Mini pedal throw is a bit long, so I'd bet you'll get by just fine with how you modified the pedal - do a stop though, don't want to snap the cable.



its the actual cable throw thats an issue, due to the throttle being sensitive on a bike and mounted via a twist grip ,the cars pedal in its standard setup moves too much cable at once hence you end up with about half the required travel to open the throttle fully.
the sensible solution for me is to remove the pedal assembly from the car and carfully drill another 2.5mm hole about 40mm down from the existing hole .This will then cause greater pedal travel to open the throttle and should sort the problem giving me complete pedal travel when the throttle is open fully.

done it ! drilled another hole 40mm lower than the original and pedal travel has increased to about 80%
i might drill another hole and try again or just fit a stop to prevent cable breakages



#12 roofless

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Posted 14 December 2008 - 10:06 AM

OK, checked it over, my pedal sits at approx half normal height in the rest position and travels to normal depth on full depression.
we used a standard after market cable fed through a mini outer sheath and a 'universal nipple' on the pedal end - been so long I'd forgotten about it.
cable came from a bicycle spares shop and the universal nipple was home made from a shop-fitting component I think.
John did drill a new hole in the bulkhead also by the looks of things.

you can just about see in the picture how it sits low at rest.

Edited by roofless, 14 December 2008 - 10:08 AM.


#13 Monte Busa

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Posted 14 December 2008 - 08:30 PM

that makes sense then - I wanted the resting height of mine to be about the same as the brake for heel / toe, and when you do that the travel is about 505% of the normal mini pedal...

all is right with the world again.


OK, checked it over, my pedal sits at approx half normal height in the rest position and travels to normal depth on full depression.
we used a standard after market cable fed through a mini outer sheath and a 'universal nipple' on the pedal end - been so long I'd forgotten about it.
cable came from a bicycle spares shop and the universal nipple was home made from a shop-fitting component I think.
John did drill a new hole in the bulkhead also by the looks of things.

you can just about see in the picture how it sits low at rest.



#14 Udo

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Posted 15 December 2008 - 01:07 PM

When I had the R1 carbs on the A series I altered the pedal so that the movement at your foot was the same as standard.

I found without this every bump would cause eractic throttle action and also a lot easier to spin the wheels even on an A series!

I also added another return spring which also smoothed things out

you can see where the pivot point has been moved and the top part of the arm is shorter

Posted Image

still using this pedal on the BMW K head throttle bodies for the same reasons




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