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 Post subject: Reduce pedal travel?
PostPosted: June 14, 2016, 4:19 pm 
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I am looking to see if you guys had a good way to reduce pedal travel because right now it is way too much. I assume most of you will suggest adding a bell crank, but i don't see an easy way of doing this. thoughts? You can see that the throttle cable attaches directly to the pedal at the top.


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 Post subject: Re: Reduce pedal travel?
PostPosted: June 14, 2016, 4:26 pm 
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What do things look like at the other end of the cable?

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 Post subject: Re: Reduce pedal travel?
PostPosted: June 14, 2016, 4:30 pm 
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The one idea that pops to mind is to replace the cam wheel the cable rides on at the throttle body.

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 Post subject: Re: Reduce pedal travel?
PostPosted: June 14, 2016, 4:36 pm 
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ngpmike wrote:
What do things look like at the other end of the cable?


like this.... i will try to get a better pic.
Attachment:
2014-10-20 19.42.09.jpg


here is a clear pic of the civic throttle which is similar to mine
Attachment:
IMG_0001a.jpg


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 Post subject: Re: Reduce pedal travel?
PostPosted: June 14, 2016, 4:37 pm 
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300D50 wrote:
The one idea that pops to mind is to replace the cam wheel the cable rides on at the throttle body.



what????

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 Post subject: Re: Reduce pedal travel?
PostPosted: June 14, 2016, 4:53 pm 
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option 1: extend the length of the upper lever arm at the pedal...easiest most likely. Probably could just lower the pivot point.
option 2: Loop the cable around a pulley attached to the upper end of the pedal and anchor the end so that you get a 2:1 ratio
option 3: shorter lever arm at throttle body...probably least desirable.
option 4: as you mentioned, bell crank to change the ratio

I would probably do 1 or 2.

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 Post subject: Re: Reduce pedal travel?
PostPosted: June 14, 2016, 5:33 pm 
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mjalaly wrote:
300D50 wrote:
The one idea that pops to mind is to replace the cam wheel the cable rides on at the throttle body.



what????


Second photo, the cam wheel on the throttlebody shaft could be changed out to adjust your throw.
That's if you can't adjust the pedal pivot successfully.

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 Post subject: Re: Reduce pedal travel?
PostPosted: June 14, 2016, 5:59 pm 
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JPS, I was thinking 1 or 3 when I asked about the other end of the cable, but #2 sounds like the easiest.

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 Post subject: Re: Reduce pedal travel?
PostPosted: June 14, 2016, 6:49 pm 
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JPS Europa wrote:
option 1: extend the length of the upper lever arm at the pedal...easiest most likely. Probably could just lower the pivot point.
option 2: Loop the cable around a pulley attached to the upper end of the pedal and anchor the end so that you get a 2:1 ratio
option 3: shorter lever arm at throttle body...probably least desirable.
option 4: as you mentioned, bell crank to change the ratio

I would probably do 1 or 2.


Im not following how option 2 would be set up. Pics?

I could always just make a new throttle rotor/pulley too.

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 Post subject: Re: Reduce pedal travel?
PostPosted: June 14, 2016, 6:55 pm 
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I vote for #1.

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 Post subject: Re: Reduce pedal travel?
PostPosted: June 14, 2016, 7:12 pm 
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Just google 2:1 pulley and it will be clear.

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 Post subject: Re: Reduce pedal travel?
PostPosted: June 14, 2016, 7:22 pm 
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Yeah that didn't help. Not sure if I can extend the upper section either. Not sure if other stuff is in the way. I'm also not sure how much I will need to extend it.

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 Post subject: Re: Reduce pedal travel?
PostPosted: June 14, 2016, 7:58 pm 
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Let's try attacking it from a different angle. How much pedal travel do you have now, and how much would you like to have? :?:

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 Post subject: Re: Reduce pedal travel?
PostPosted: June 14, 2016, 8:22 pm 
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I don't know exactly since the car is in the shop but I bet it has a 4" to 6" stroke. I need way less than that.

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 Post subject: Re: Reduce pedal travel?
PostPosted: June 14, 2016, 9:47 pm 
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Well, to reduce pedal travel by half with option 1, you would double the length of the upper lever arm (the distance from the pedal pivot to the cable anchor), or with option 2, you would replace the cable anchor at the top of the arm with a pulley. You would simply route the cable (probably needs to be lengthened) around the pulley, take it forward and then mount it to a frame member. For every inch the pulley moves, you will get two inches of cable travel at the T/B.

Got it?

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