[DML] Re: Cruise control?

["Wilson Hitchings" <canon20dfan@xxxxxxxxx>]

Ryan, that's a great post. Do you have photos of your installation?

--- In dmcnews@xxxxxxxxxxxxxxx, "Ryan Wright" <ryanpwright@...> wrote:
>
> On 8/4/07, DMCVIN6683 <dmcvin6683@...> wrote:
> >
> >  The cruise control does not pull on the throttle enough to pull 
the
> >  cable loose. I had my car on jackstands in 5th gear at 2000rpm 
and
> >  this is almost 55mph. I had a friend hit the brakes and let the 
car
> >  slow down and then re-engage the cruise at all different rpm's 
and
> >  the cruise never pulled hard enough to pull the spool where the
> >  throttle cable could come loose.
> 
> It's not so much a matter of pulling hard, but rather a matter of
> binding up with the existing cable. Of course I know of absolutely
> zero cases where this has actually happened, but I did do some 
testing
> and it is a possibility.
> 
> Note that it IS possible to unwind the stock throttle cable off the
> spool, and cruise control could potentially contribute to this. You
> can test this by simply playing with the spool. Turn the thing as 
far
> as it will go (wide open throttle - do all your playing with the
> engine off, ok?) and you'll see the stock throttle cable unwind, 
since
> nobody is actually pushing on the gas. If you disturb the cable, you
> can see there is enough slack there that it could slip off the spool
> and get caught. Now there are all manner of little metal pieces
> sticking off the spool that should prevent this, but the possibility
> still exists.
> 
> Add in the cruise control pulling from around the spool and, in my
> opinion, you have a potential for trouble. Is it a big potential? 
Not
> really, quite honestly I think it's infinitely small.
> 
> Still, I mounted my cruise control on the back side of the spool for
> several reasons:
> 
> 1. It was easier this way.
> 2. I was able to use existing holes / mounting points on the body 
so I
> could remove the system and leave no trace that it ever existed, if 
I
> so wanted to.
> 3. Zero potential for the cruise cable to interfere with the stock 
cable.
> 4. In this configuration, it is impossible for the cruise to pull 
wide
> open throttle. Due to the angle of the mount it is only capable of
> pulling about 75% throttle. This is a good thing for several 
reasons -
> first, it makes it impossible for the stock cable to unwind enough 
to
> slip off or get caught up on something. You really have to pull WOT
> for this to even be a possibility. Second, if the cruise module were
> to freak out for some reason, the amount of acceleration it could
> provide would be smaller, thus giving me more time to shift into
> neutral and turn the engine off.
> 
> The cruise pulling on the gas pedal bit is a neat idea, even more so
> because the pedal will move back and forth like a more modern cruise
> control system does. But I did not want a cruise control box mounted
> in my trunk, didn't want to drill holes in the body to route the
> cable, and didn't want some funky cable looped around my gas pedal 
and
> potentially interfering with normal, non-cruise driving. Perhaps 
these
> are non-issues, I don't know, haven't seen the way it was mounted 
but
> I did consider this option and didn't see a way (or wasn't creative
> enough to figure it out) to do this as cleanly as the installation I
> wound up using. I do like the gas pedal moving with the cruise bit
> that this style of installation offers, though.
> 
> -Ryan
>




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