pedlar17 Posted February 17, 2015 Report Share Posted February 17, 2015 I am currently rebuilding the throttle linkage, on a 1972 PI TR6 and the fast idle cam is missing. It is part of a full nut and bolt restoration, and it explaines why it would not idle when cold. All the major suppliers do not have one. Does anyone have a decent pic or a drawing so I can make one. Many Thanks Quote Link to post Share on other sites
Stooble Posted February 18, 2015 Report Share Posted February 18, 2015 As far as I know the fast idle cam is redundant so it doesn't matter if it's missing. The choke only needs to operate the MU to richen the mixture & when up to temperature the idle is set by the air bleed tap on the front throttle body. Hope that helps. Quote Link to post Share on other sites
peejay4A Posted February 19, 2015 Report Share Posted February 19, 2015 Unless you want to be heel and toeing in traffic while it warms up I'd say that the fast idle cam was pretty useful. In my experience. Quote Link to post Share on other sites
pedlar17 Posted February 19, 2015 Author Report Share Posted February 19, 2015 The problem without the fast idle cam is that it would not idle until warm so stopping at junctions or rounderbouts was a problem. I am really eager to get a new one as mine is missing altogether. I can make one, if anyone can give me some rough dimensions to start with. Quote Link to post Share on other sites
Guest ntc Posted February 19, 2015 Report Share Posted February 19, 2015 Do you have all the other parts? Quote Link to post Share on other sites
pedlar17 Posted February 19, 2015 Author Report Share Posted February 19, 2015 Yes I have the cable bracket and have ordered from Rimmers the shoulder screw, washers, and cable end. So I am only missing the cam. The second choke cable was coiled up. Quote Link to post Share on other sites
Guest ntc Posted February 19, 2015 Report Share Posted February 19, 2015 I have one in the garage somewhere,I will look tomorrow Quote Link to post Share on other sites
pedlar17 Posted February 19, 2015 Author Report Share Posted February 19, 2015 That would be fantastic, Thanks very much Neil. Regards Quote Link to post Share on other sites
Guest ntc Posted February 19, 2015 Report Share Posted February 19, 2015 Is your bracket Like this? Quote Link to post Share on other sites
pedlar17 Posted February 19, 2015 Author Report Share Posted February 19, 2015 Exactly the same Quote Link to post Share on other sites
Guest ntc Posted February 19, 2015 Report Share Posted February 19, 2015 I hope I can find the rest later on,but it is only a pear shaped thing easy to make. Quote Link to post Share on other sites
pedlar17 Posted February 19, 2015 Author Report Share Posted February 19, 2015 Thanks for your effort Neil. It really is getting the radius correct, so it opens the butterflies by the correct amount. Otherwise it may be a lost of trial and error. Many thanks Quote Link to post Share on other sites
Chilp3 Posted February 20, 2015 Report Share Posted February 20, 2015 Hopefully Neil will discover the elusive cam within the depths of his garage in due course. If it's anything like mine I always seem to struggle to find things even with frquent tidying and clear-outs! I have recently fitted a replacement under-slung throttle linkage kit to my CR series TR6 provided by Malcolm at Prestige Injection Services. This kit includes the fast idle cam for the choke and is pretty simple to set up. The only comment I would make is that you will need to fit a CP throttle cable which is shorter than the CR. The mechanism works extremely well providing individual adjustment for each throttle body as well as achieving full opening of all of the butterflys at maximum depression of the accellerator. This was part of a complete overhaul of the injection system on my car from front to back but that's another story! Just an alternative suggestion and view which hopefully may be of interest and help to other TR owners. Best Regards, Peter Quote Link to post Share on other sites
pedlar17 Posted February 21, 2015 Author Report Share Posted February 21, 2015 Whenever I have a garage tidy up, I think I have put parts in logical places, that I can find easily. However when the time comes and I need a part, it usually takes a few hours of constant swearing as someone must have been in the Garage and moved them. Anyway, I hope Neil digs it out Regards Laurie Quote Link to post Share on other sites
TriumphV8 Posted February 21, 2015 Report Share Posted February 21, 2015 During discussion you might want to do some homework: Measure distance between axle and lever, I expect 35mm, if not, modify diametre according to my guide. Take a 2.5 to 3mm mild steel plate, punch the centre and make a circle with 70mm. Cut that circle out with a grinder where the full smooth outside surface is not required at this stage. Mark a punch 10mm away from the centre and drill a hole that fits to the axle. Put it on the axle and turn it till it fits. When you rotate it will meet the lever somewhere at a point and begin to lift it. Mark that point with an edding. 5mm before and 40mm after that is your cam. Smooth the surcface in that area without taking off too much material. Drill an appropriate hole to fit the cable by testmount and pulling the cable into position. Cut off all the not required material to make the cam a nice look .... and that's it. Should be done within one hour. Good luck!!!! Quote Link to post Share on other sites
pedlar17 Posted February 21, 2015 Author Report Share Posted February 21, 2015 Wicked, thanks Andreas just what I needed. regards Laurie Quote Link to post Share on other sites
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