scannon Posted May 8, 2013 Share Posted May 8, 2013 (edited) Due to several long trips planned in the Caterham this summer I decided to install an aftermarket Cruise Control. I used the Rostra 250-1223 all electronic kit as it uses a stepper motor instead of vacuum to pull the throttle open. Much more friendly to a turbo engine which tends to run out of vacuum as the boost comes on on long hills resulting in the car slowing down. Installation was a PITA due to the lack of space to install the components and then getting my hands in there to wire them up. I've been working on this for almost a week, having to walk away from it several times due to frustration. However, it is now installed and working very well. Originally I used the sensor on the front wheel that provides the signal to the electronic speedometer. It provides a 7 volt square wave signal just like the cruise control instruction book requires. The cruise control refused to recognize the signal even though I had measured it within their spec of 5 - 12 volts. I had to use a magnet zip tied on the driveshaft with a sensor mounted above it attached to the bracket of the hand brake. A flip of the microswitch from square wave to sine wave and all was well. I forgot to take a picture of it before I put the console cover back on. The first picture shows the black control module tucked behind the aluminum water tank and the plastic water/methanol tank, the only place I could find under the bonnet to put it. Edited May 8, 2013 by scannon Link to comment Share on other sites More sharing options...
Mondo Posted May 9, 2013 Share Posted May 9, 2013 Your car just keeps getting better and better. Sadly, if I can't bolt it or plug it... it ain't happening. Link to comment Share on other sites More sharing options...
WestTexasS2K Posted May 9, 2013 Share Posted May 9, 2013 I installed a cruise for my first One Lap adventure. It worked for a day then quite. I was a bit of a clunky mess to install. It was nice for the day it worked, but was to unreliable to to keep on the car. Link to comment Share on other sites More sharing options...
scannon Posted May 9, 2013 Author Share Posted May 9, 2013 I installed a cruise for my first One Lap adventure. It worked for a day then quite. I was a bit of a clunky mess to install. It was nice for the day it worked, but was to unreliable to to keep on the car. I hope this one lasts a bit longer. What brand and model did you use? Link to comment Share on other sites More sharing options...
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