Throttle Cable Adjustment

Throttle Cable Adjustment

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Lewis's Friend

Original Poster:

1,026 posts

189 months

Thursday 12th May 2016
quotequote all
Hi all

Quick question. I have been trying to adjust some of the dead travel at the top of my accelerator. My issue is, to have it set where I want it, the adjuster only has a few threads engaged which doesn't seem right.

However, I noticed for the first time that the cable is attached on a screw in the middle of the actuator arm, not on the ball at the end.



Is this normal does anyone know? A TVR special, or is this an after market special!?

phillpot

17,105 posts

182 months

Thursday 12th May 2016
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looks like someones attempt to make the throttle response more "snappy", not standard.

Lewis's Friend

Original Poster:

1,026 posts

189 months

Thursday 12th May 2016
quotequote all
Thanks, I've put it back to the normal position, which gives me more scope for adjustment. Much better...!

However, the plastic end that sits on the ball seems pretty loose. I'm not sure whether this has been damaged by having a bolt rammed through it or was a bit sloppy and was therefore modified.

If need be, can throttle cables be got hold of? I seem to recall that these are one of those things that you must hope you never need...!

lewdon

316 posts

164 months

Thursday 12th May 2016
quotequote all
There should be a metal clip that holds the ball into the plastic cable end. in your photo it looks as though it is missing. I'll take a photo of mine when I finish my lunch.

Lewis's Friend

Original Poster:

1,026 posts

189 months

Thursday 12th May 2016
quotequote all
lewdon said:
There should be a metal clip that holds the ball into the plastic cable end. in your photo it looks as though it is missing. I'll take a photo of mine when I finish my lunch.
That would be very kind, thanks.

lewdon

316 posts

164 months

Thursday 12th May 2016
quotequote all
here you go. Its identical to the clip fitted to the end of the plastic linkage rod .

lewdon

316 posts

164 months

Thursday 12th May 2016
quotequote all
this is the one on the rod.

Lewis's Friend

Original Poster:

1,026 posts

189 months

Thursday 12th May 2016
quotequote all
Thanks very much Lewdon. I'll have to see if I can make one up - I suspect finding one in the wild would be tricky!

Edit - they seem to be on ebay for a fiver. You live and learn!

lewdon

316 posts

164 months

Thursday 12th May 2016
quotequote all
5 quid seems a lot for something so small. it might be worth asking your local Ford, I am sure I have seen similar on much newer cars.

party7

60 posts

143 months

Thursday 12th May 2016
quotequote all
Lewis's Friend] said:
Is this normal does anyone know? A TVR special, or is this an after market special!?
My throttle cable (S3c) is identical to yours in that it has the same mid-arm screw attachment, so maybe another TVR inconsistency.

The plastic adjuster snapped on mine last weekend, so I'm currently looking at replacement cable options.

Lewis's Friend

Original Poster:

1,026 posts

189 months

Friday 13th May 2016
quotequote all
party7 said:
Lewis's Friend] said:
Is this normal does anyone know? A TVR special, or is this an after market special!?
My throttle cable (S3c) is identical to yours in that it has the same mid-arm screw attachment, so maybe another TVR inconsistency.

The plastic adjuster snapped on mine last weekend, so I'm currently looking at replacement cable options.
Well, I've put mine back on the outer ball, which means I've been able to get rid of all the dead travel at the top of the pedal.

In conjunction with the straight cut throttle plate I've fitted, I think I prefer this setup. It's increased the pedal travel, but I think this is an improvement as it allows a little more finesse on the accelerator. I'll se how I get on with it over a few more miles though.

GreenV8S

30,150 posts

283 months

Friday 13th May 2016
quotequote all
Make sure you don't adjust the throttle pedal up too high, or you will kink the cable at the pedal end leading to premature failure.

RayTVR

1,040 posts

142 months

Friday 13th May 2016
quotequote all
Lewis's Friend said:
party7 said:
Lewis's Friend] said:
Is this normal does anyone know? A TVR special, or is this an after market special!?
My throttle cable (S3c) is identical to yours in that it has the same mid-arm screw attachment, so maybe another TVR inconsistency.

The plastic adjuster snapped on mine last weekend, so I'm currently looking at replacement cable options.
Well, I've put mine back on the outer ball, which means I've been able to get rid of all the dead travel at the top of the pedal.

In conjunction with the straight cut throttle plate I've fitted, I think I prefer this setup. It's increased the pedal travel, but I think this is an improvement as it allows a little more finesse on the accelerator. I'll se how I get on with it over a few more miles though.
Me too, thanks to Alan's straightened plate and an as new cable sourced on Ebay I have gone back to the original ball mounting. Pedal travel is longer but definitely more progressive and I prefer it so far.

magpies

5,129 posts

181 months

Friday 13th May 2016
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and don't forget to fit some sort of pedal stop rather than the one on the throttle plate as all that does is to transfer the forces to the ends of the cable and that leads to it breaking.

Lewis's Friend

Original Poster:

1,026 posts

189 months

Friday 13th May 2016
quotequote all
magpies said:
and don't forget to fit some sort of pedal stop rather than the one on the throttle plate as all that does is to transfer the forces to the ends of the cable and that leads to it breaking.
Sorry, not sure I follow. What kind of stop is needed? I thought that at rest, the cable would just be under a small amount of tension. Can this cause damage?

I'm not sure I understand where the failure can occur?

Thanks

Alan461

853 posts

130 months

Friday 13th May 2016
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The cable is over stressed at the bottom of pedal travel when you floor it.
Tps and linkage is protected by the stops but the cable isn"t
The pedal needs a stop in the footwell. I'll put a photo on in a bit

[url]

|http://thumbsnap.com/c2aUfAsI[/url]

Edited by Alan461 on Friday 13th May 15:01

GreenV8S

30,150 posts

283 months

Friday 13th May 2016
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I made a throttle stop out of some tube and a couple of 'top hat' end fittings designed for towel rail installations. Definitely worth doing to avoid overloading the cable at full throttle. However, the problem I mentioned previously occurs when you have the throttle completely closed (i.e. in the idle position) - you can adjust the throttle pedal position using the cable adjustment at the engine end, and if you adjust the pedal up too high the cable inner has to kink at the pedal end, which will lead to failure.

Edited to add a picture.


Edited by GreenV8S on Friday 13th May 19:14

Lewis's Friend

Original Poster:

1,026 posts

189 months

Friday 13th May 2016
quotequote all
Thanks for the feedback. I've not checked at the pedal end of things, so I'll have a little look and see where I stand. Possibly more excellent fabrication work (bodgery) needed from me...!

magpies

5,129 posts

181 months

Friday 13th May 2016
quotequote all
I think I did the prototype for Alan - used 1/2" studding with nuts and large washers. Difficult bit = push peddle to max and mark the baulkhead where to drill. Drill suitable hole and with a friend holding the peddle fully down, feed the studding through 'til it touches the back of the peddle. Fit washer and run nut up to the where the studding goes through the body. Get your friend to do the same from the inside and nip the nuts up. Check the throw of the peddle and that it hits the end of the studding just as the throttle is fully open or a mm or 2 before. tighten the nuts and cut the excess studding off from the outside so the tyre does not foul on it.