MARK Posted May 27, 2014 Report Share Posted May 27, 2014 Changed my points as they looked worn and going to do a lot of miles at weekend. - I know dont fix wot aint broken !!! Changed rotor arm for quality red one. Will fitting new points have altered timing? -as now not running and picking up as well as it did before. What is correct Dwell angle for late tr6?,( typical cant find my manual !)I have got a Gunsons unit for checking. I am running an Aldon ignitor coil which may be too much for points (gap different a for high power coil?) but has been fine for three years.Car running on triple weber 40 DCOE. Any thoughts please! . Quote Link to post Share on other sites
Peter Cobbold Posted May 27, 2014 Report Share Posted May 27, 2014 (edited) You dont mention you have set the gap on the new points. If the gap is right so will be the dwell. Make sure there is smear of grease on the cam. Plastic points wear badly especially initially, and if fitted dry can stop the engine runnning in a couple of hundred miles. Take the feeler gauge with you on your trip! 14 to 16 thou IIRC Peter Edited May 27, 2014 by Peter Cobbold Quote Link to post Share on other sites
RogerH Posted May 27, 2014 Report Share Posted May 27, 2014 Hi Mark, put the original rotor arm back in and see what happens.? The points either work or don;t if put back wrong. If the gap is OK then so should be the dwell angle . In fiddling with the electrics have you knocked off any pipe work for the carbs, vacuum etc. Roger Quote Link to post Share on other sites
RobinTR6 Posted May 27, 2014 Report Share Posted May 27, 2014 Depends on dizzy, 22d6 ...41319......35 degrees +/- 3 degrees The other Lucas dizzy's I Assume for carb cars ate all 25 degrees +/- 3 degrees. Quote Link to post Share on other sites
MARK Posted May 27, 2014 Author Report Share Posted May 27, 2014 Hi Peter - points set at 15 thou. Old set had been in the car for about 5 years. I should have checked the gap of the old ones which also had not been altered at all. I wonder if I have altered the timing to suit the points Gap in the past and now I have set the points correctly it has upset the timing slightly.Or am I talking rubbish? Quote Link to post Share on other sites
MARK Posted May 27, 2014 Author Report Share Posted May 27, 2014 My car was originally 73 fuel injection( currently triple 40 dcoe) and has correct dizzy. Are those figures correct for fuel injected 73 tr6 Robin ? Quote Link to post Share on other sites
RobinTR6 Posted May 27, 2014 Report Share Posted May 27, 2014 Yes, check the serial number pm the side, stamped into, the dizzy for the 41319 number. This is the standard dizzy for PI cars. Quote Link to post Share on other sites
peejay4A Posted May 27, 2014 Report Share Posted May 27, 2014 Points gap will affect timing so if you had the old set in for a while before setting the timing it would be as well to get a strobe on it and be certain it's right. Quote Link to post Share on other sites
Peter Cobbold Posted May 27, 2014 Report Share Posted May 27, 2014 (edited) Hi Peter - points set at 15 thou. Old set had been in the car for about 5 years. I should have checked the gap of the old ones which also had not been altered at all. I wonder if I have altered the timing to suit the points Gap in the past and now I have set the points correctly it has upset the timing slightly.Or am I talking rubbish? Hi Mark, If the gap on the old ones was different from 15 thou then the timing will be different now. Easiest way to set the timing is to run the enigne at tickover and slowly turn the disy to and for, a few mm no more, until you get the fastest tickover. then retighten the disy clamp. If it really speeds up, keep rpm below 1000 by slowing the tickover to stop centrigugal advance coming in. Reason for using this method is the timing mark on the pulley may no longer be at TDC as the rubber in the crank damper distorts with age. Finding the new TDC needs a little more work.... Peter Edited May 27, 2014 by Peter Cobbold Quote Link to post Share on other sites
Tom Fremont Posted May 27, 2014 Report Share Posted May 27, 2014 Haven't checked dwell since way, way back in the 1900s on mine ( late '70s ). Gap at 0.015" is the target value but should do OK close to that. More likely your timing has been retarded a bit; I find on mine ( TR250 with P.I. head, cam and 3X40DCOE ) a couple of degrees makes a surprising difference. Set to ping point and back off with your handy vernier; 2 degrees per 1/2 turn . If gap is OK then just advance it a half turn and see how it does. Quote Link to post Share on other sites
Peter Cobbold Posted May 27, 2014 Report Share Posted May 27, 2014 New points might have factory protection - try cleaning the contacts with fine wet and dry. Quote Link to post Share on other sites
Guest ntc Posted May 27, 2014 Report Share Posted May 27, 2014 Hi Peter - points set at 15 thou. Old set had been in the car for about 5 years. I should have checked the gap of the old ones which also had not been altered at all. I wonder if I have altered the timing to suit the points Gap in the past and now I have set the points correctly it has upset the timing slightly.Or am I talking rubbish? Mark Not at all,dwell is also the duration of the points gap, the gap can vary,check your timing. Quote Link to post Share on other sites
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