Second throttle cable

[Mark H.]

Short of having a spare cable and doing a roadside repair on a broken throttle cable, any thoughts on a second cable running thru the firewall/bulkhead to the carb via a hand operated pull knob? Was thinking about using an aircraft throttle setting unit that would hold the rpm high enough to get home. Maybe over thinking stuff?

 

[Devin]

Short of having a spare cable and doing a roadside repair on a broken throttle cable, any thoughts on a second cable running thru the firewall/bulkhead to the carb via a hand operated pull knob? Was thinking about using an aircraft throttle setting unit that would hold the rpm high enough to get home. Maybe over thinking stuff?

Not sure of your over cautious concern. I have only had one throttle cable issue in all my years (40+) of flying, driving, boating, cycling and anything with a motor. That one was on my first Cobra replica shortly after getting it on the road and the routing got too close to the hot headers. A redo of the routing and a new cable and no other issues. Only other issue was some binding from lack of use and lube solved those issues on older equipment. However my experience, you do you and make it a non-issue and install as you see fit for your peace of mind if it concerns you. I don’t know if you were thinking of it as a quick hook up after a problem or finding a way to make them work in tandem continuously?

 

[Mark H.]

Was thinking of a permanent install in the bulkhead, only hooked to the carb throttle if needed . I read on the forum that a few had problems and some carry another cable as back up.

 

[Bill Kearley]

GT40s have a very long cable and when Borla 8 stack is used you have a very heavy throttle.
I also have concerns of cable issues.
My head is working on some sort of assist system that will take some of the load off the right foot and cable.

Ideas welcome !!

 

[Ian Anderson]

I carried a second cable in my car.. 15 years and never needed it ……..but 2 other club members borrowed it and replaced it when they got home.

 

[Brian Kissel]

Bill, think DBW.

Regards Brian

 

[Mike Pass]

I just keep a second inner cable in the car and a few solderless nipples. It's the inner that breaks. pull the broken one out and feed the new inner cable through and put a couple of solderless screw clamped nipples on each end.
Cheers
Mike

 

[Neil]

A long time ago I had a VW Avenger kit car and on a drive the clutch cable broke. With luck I managed to get it home with rolling ahead on the starter and then very careful shifting. Not fun!,

 

[Mark H.]

Bill, some type if force multiplier that increases the cable ratio, small block and pulley affair? Mike, would think it would be difficult and probably somewhat dangerious to get down to the pedals to attach the nipple when on the side of the road. Just thinking outsde the box. I guess the original cars never had issues, at least I have not read about? Would be nice to speak to some of the original mechanics of the day concerning.

 

[Bill Kearley]

I'd like that Brian but never heard of it being used with the 8 stack. ??
Mark, it's only a matter of pedal travel vs Borla ratio. I'm using all the pedal travel I can.

 

[Brian Kissel]

Bill, take a look here.

Drive By Wire Components

Components to assist with Drive By Wire Installation

www.efihardware.com

Regards Brian

 

[Randy V]

I did have a throttle cable problem and the cable end broke off. I set the idle speed adjustment to about 2k RPM with my pocket knife and made my way home.

 

[Bill Kearley]

Another possible project, thanks Brian

 

[Bob Putnam]

https://www.digikey.com/en/products/detail/adafruit-industries-llc/412/5819056?gclsrc=aw.ds&&utm_adgroup=&utm_source=google&utm_medium=cpc&utm_campaign=PMax%20Shopping_Product_Low%20ROAS%20Categories&utm_term=&utm_content=&utm_id=go_cmp-20243063506_adg-_ad-__dev-c_ext-_prd-5819056_sig-Cj0KCQjw2ZfABhDBARIsAHFTxGyuyX_U0IiecF5yPbNKfNaVs3meDGhUeqoyPLrL_TgdCxDGBMUXZhAaAvdEEALw_wcB&gad_source=1&gclid=Cj0KCQjw2ZfABhDBARIsAHFTxGyuyX_U0IiecF5yPbNKfNaVs3meDGhUeqoyPLrL_TgdCxDGBMUXZhAaAvdEEALw_wcB

 

[Glenn M]

GT40s have a very long cable and when Borla 8 stack is used you have a very heavy throttle.
I also have concerns of cable issues.
My head is working on some sort of assist system that will take some of the load off the right foot and cable.

Ideas welcome !!

I had that same set up Bill, with the same problems, the throttle was really stiff off idle and in the first opening. My solution, after making sure that the pedal, cable etc was as free and lubed as possible, was to make a snail cam giving the maximum pull/leverage away from idle and reducing towards WOT. (See very quick sketch to save a thousand words.) Obviously adjust dimensions to suit your cable pull etc.
It worked a treat for me.

 

[Bill Kearley]

Thanks Glenn, I'll have to give that idea some thought, I like it. I also had the idea of a spring at the manifold end of things to take some load of but that could be very risky !!!