Throttle cable length

[pb3]

My throttle stuck for the first time last night and I found myself having to hook my foot round the back of the pedal to bring it back.
Does anyone happen to know the length of the throttle cable so I can source a replacement? This will save me having to take the old one out to measure it.
Cheers
Phil

[stig]

pb3 said:

My throttle stuck for the first time last night and I found myself having to hook my foot round the back of the pedal to bring it back. Does anyone happen to know the length of the throttle cable so I can source a replacement? This will save me having to take the old one out to measure it. Cheers Phil

Factory can supply a Venhill Teflon Lined replacement. No need to measure that way

[craig-ultima]

I put an extra spring on mine (on a bell crank on the manifold) because I put the cable down the wrong side of the car. I've heard others recommend another spring also at the pedal itself to pull the cable back through the liner, otherwise, its just "pushing" back. I'll probably do that job over winter.

[GreenV8S]

craig-ultima said:

I've heard others recommend another spring also at the pedal itself to pull the cable back through the liner, otherwise, its just "pushing" back.

Don't understand that, isn't it the other way round?

[craig-ultima]

Green V8 - You are absoluely right - any spring on the accelerator cable should be pulling it against the throttle pedal, i.e. to close the throttle. I'm a logical theorist by training, and embarrassed that I missed this rather obvious point. I must have misunderstood or misheard the advice - it may have been that they were saying that it was a good idea to have another spring to push the cable back up into the cable liner at the pedal end.

If that is the case, I don't like that idea very much, since it is in the "pushing rope up a hill" mode. But maybe it helps work against dirt or binded cables in some fashion??

[Alan 2]

I have three return springs on my Sports, two at the carb end and one on the pedal. This has worked perfectly and after six years, the throttle is still as smooth as silk. To anyone building an Ultima, I would strongly recommend fitting a long return spring at the pedal end to guarantee that the pedal always comes back when you take your foot off. I once had the throttle stick open on a Corvette and am lucky to still be around to post this comment.

I have some photographs of this set up (which is adjustable for spring tension) which I have recently fitted to the GTR I am putting together. I don't know how to post an image here but would be happy to e-mail them to anyone who is interested.

[pb3]

I have just ordered the new improved replacement from the Factory, the Teflon stainless job which is now standard equipment. I may still look at the extra springs for "good measure", but what effect do they have on the pedal feel or are you unaware of any difference? (I would assume the throttle with all the springs is nothing compared to the clutch and brake!)

[stig]

pb3 said:

I have just ordered the new improved replacement from the Factory, the Teflon stainless job which is now standard equipment. I may still look at the extra springs for "good measure", but what effect do they have on the pedal feel or are you unaware of any difference? (I would assume the throttle with all the springs is nothing compared to the clutch and brake!)

The Teflon cable that I sourced (now adopted by the factory) is about 1000 times better than the old one. That said, I also run with return springs on the pedal and carb. One on the pedal, 2 on the carb.

Belt and braces as I've had throttles stick wide open on my race car - not fun!

[craig-ultima]

Alan, email me the photos of the pedal setup to [e-mail]. I'll post them for you (as well as I'd like to see them for my own build).