Ty_bach Posted March 11, 2022 Report Share Posted March 11, 2022 Hi, For many years (35) that I have owned my Herald 1200 Convertible, when I have gone out in the evening or on a poor day, I have put up with juggling my power requirements between the heater blower, the wipers and the headlights. I can have two out of the three, but not all three turned on. The dynamo could not handle the load. I recently decided to fit a Dynamator to my +positive earth car. The supplier gave me a relay to wire into the ignition circuit. Can any one tell me exactly what the relay does as I don't see the point of doing so? Martin Herald 1200 Conv 1966 Link to comment Share on other sites More sharing options...
Paul H Posted March 11, 2022 Report Share Posted March 11, 2022 I had a Dynamator for my negative earth Vitesse and no external regulator required as it’s built in . For positive earth found this link again no regulator required Paul Link to comment Share on other sites More sharing options...
Ty_bach Posted March 11, 2022 Author Report Share Posted March 11, 2022 Thanks Paul, but what is the relay for, why must it be in the circuit? I understand the fitting of a relay when incorporated into e.g. headlamp circuit or a horn circuit, but I don't understand why the relay should be fitted into the ignition circuit as is suggested in this way. Apparently its only on +positive earth cars and not -negative earth cars. Why? Martin Link to comment Share on other sites More sharing options...
Pete Lewis Posted March 11, 2022 Report Share Posted March 11, 2022 i would hazard a guess its to stop voltage feed back via the warning lamp circuit when the ignition is off all down to how they monitor the charge circuit not the base car wiring unfortunate but a good few have found them expensive and unreliable I accept an alternator does not look like a dynamo but they are cheap reliable and very simple to wire up and fit Pete Link to comment Share on other sites More sharing options...
RogerH Posted March 11, 2022 Report Share Posted March 11, 2022 For the sake of looking like a dynamo these are not worth the hassle. They run hot and that is their down fall. Ge a decent alternator go seriously upmarket and get a denso small alternator - it doesn't look like an alternator Roger Link to comment Share on other sites More sharing options...
Paul H Posted March 11, 2022 Report Share Posted March 11, 2022 My Dynamator lasted a fortnight albeit an 1500 mile trip to Ireland . Here’s the replacement which I have yet to fit Paul Link to comment Share on other sites More sharing options...
rogerguzzi Posted March 11, 2022 Report Share Posted March 11, 2022 6 minutes ago, Paul H said: My Dynamator lasted a fortnight albeit an 1500 mile trip to Ireland . Here’s the replacement which I have yet to fit Paul Hello All That is the type I have on Spitty and I must have done 30,000 to 40,000 miles plenty of power (40amp) As a bonus you can get at No1 plug easier! Roger Link to comment Share on other sites More sharing options...
Paul H Posted March 11, 2022 Report Share Posted March 11, 2022 32 minutes ago, rogerguzzi said: Hello All That is the type I have on Spitty and I must have done 30,000 to 40,000 miles plenty of power (40amp) As a bonus you can get at No1 plug easier! Roger Hi Roger , do you carry any spares for the Denso Paulb Link to comment Share on other sites More sharing options...
PeteH Posted March 11, 2022 Report Share Posted March 11, 2022 They look a bit like the one`s fitted to mini diggers?. Pete Link to comment Share on other sites More sharing options...
Paul H Posted March 11, 2022 Report Share Posted March 11, 2022 Just now, PeteH said: They look a bit like the one`s fitted to mini diggers?. Pete Yes my research says they are used on Kubotas . Non branded versions are £50 or so Paul 1 Link to comment Share on other sites More sharing options...
daverclasper Posted March 11, 2022 Report Share Posted March 11, 2022 5 hours ago, Pete Lewis said: I accept an alternator does not look like a dynamo but they are cheap reliable Yes, though maybe not. If buying off the shelf, cheap, yes, though a lot of recent info on here that they maybe don't last long at all? Link to comment Share on other sites More sharing options...
rogerguzzi Posted March 11, 2022 Report Share Posted March 11, 2022 2 hours ago, Paul H said: Hi Roger , do you carry any spares for the Denso Paulb Hello Paul No but I would make sure it is a genuine Nippon Denso not a cheap Chinse copy If you look about you will find one for about £100 or less I have fitted one to the Vitesse as well. I needed the extra output when I went to ITB's EFI as the pump runs all the time at about 8amps which the lucas would do but gets a bit marginal with lights etc. Plus we like to go to Spain,Portugal and Spa 6 hours etc and I could get one abroad easier! Roger ps The model numbers are16678-64012 10-0211-4730 plus I fitted a nice adjuster makes ajusting the belt just right 1 Link to comment Share on other sites More sharing options...
Paul H Posted March 11, 2022 Report Share Posted March 11, 2022 12 minutes ago, rogerguzzi said: Hello Paul No but I would make sure it is a genuine Nippon Denso not a cheap Chinse copy If you look about you will find one for about £100 or less I have fitted one to the Vitesse as well. I needed the extra output when I went to ITB's EFI as the pump runs all the time at about 8amps which the lucas would do but gets a bit marginal with lights etc. Plus we like to go to Spain,Portugal and Spa 6 hours etc and I could get one abroad easier! Roger ps The model numbers are16678-64012 10-0211-4730 plus I fitted a nice adjuster makes ajusting the belt just right The adjuster looks the part . Any chance of further details ? Paul Link to comment Share on other sites More sharing options...
rogerguzzi Posted March 11, 2022 Report Share Posted March 11, 2022 Hello Paul I used these people for the adjuster I will measure the size tomorrow. Metric & Imperial Adjustable Linkages (mcgillmotorsport.com) Roger. ps it needs to be right and lefthand threads. 1 Link to comment Share on other sites More sharing options...
PeteH Posted March 12, 2022 Report Share Posted March 12, 2022 Marine chandlers do a good line in turnbuckles too. Pete Link to comment Share on other sites More sharing options...
Peter Truman Posted March 12, 2022 Report Share Posted March 12, 2022 I used a S/S turnbuckle from the cable balastrade type I had to shorten the female threaded ends a little and the U shaped brackets at the male ends had to have one lug cut off to mount onto the pump bolt and the alternator to get it short enough but it works a treat easy adjustment and looks smart Brought the turnbuckle from Bunnings here about 5 quid 1 Link to comment Share on other sites More sharing options...
Pete Lewis Posted March 12, 2022 Report Share Posted March 12, 2022 places like M10 Male Rod End LEFT HAND THREAD | Car Builder - Kit & Classic Car Parts Specialist Pete Link to comment Share on other sites More sharing options...
rogerguzzi Posted March 12, 2022 Report Share Posted March 12, 2022 20 hours ago, rogerguzzi said: Hello Paul I used these people for the adjuster I will measure the size tomorrow. Metric & Imperial Adjustable Linkages (mcgillmotorsport.com) Roger. ps it needs to be right and lefthand threads. Hello Paul The middle part is 70mm and 8mm thread and 135mm crs it would go down to 115mm crs and 150mm crs max I looked at the other turnbuckles but I like things that look engineered (its just me!) Roger 1 Link to comment Share on other sites More sharing options...
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