Drewmotty Posted September 10, 2017 Report Share Posted September 10, 2017 Denso 'lightweight' alternators are a popular upgrade and I have one fitted on each of my cars. Unlike a Lucas alternator the Deso requires a switched live to power the stator. Some suppliers offer a modified unit which does not require the extra switched live. Can any electrical gurus explain how the modification is made? Quote Link to post Share on other sites
peejay4A Posted September 10, 2017 Report Share Posted September 10, 2017 No idea but it's not hard to provide the switched feed. Quote Link to post Share on other sites
Lebro Posted September 11, 2017 Report Share Posted September 11, 2017 Lucas alternators also require a ignition switched feed to get tem going, it is supplied via the IGN warning light, this "kick starts" some current in the rotor, & once the alternator starts producing an output this is used to power the rotor, & because there is now approx. the same voltage on both sides of the warning lamp, it goes out. Bob. Quote Link to post Share on other sites
Drewmotty Posted September 11, 2017 Author Report Share Posted September 11, 2017 Thanks Bob. ???????? Quote Link to post Share on other sites
peejay4A Posted September 11, 2017 Report Share Posted September 11, 2017 You can't use that arrangement on the Denso. Quote Link to post Share on other sites
Ian Vincent Posted September 11, 2017 Report Share Posted September 11, 2017 It's a while since I fitted a Kubota Nippon Denso to my TR3a. I got the wiring diagram from the web. If you are stuck I can post a photo of the arrangement I used. It was pretty straightforward. This is the alternator I used, it was £65 when I bought it. http://www.ebay.co.uk/itm/Denso-Kubota-kit-car-race-car-light-weight-new-3-pin-40-amp-Alternator-/122662666574?hash=item1c8f43c14e:g:VrYAAOSwwzhZSkuM Rgds Ian Quote Link to post Share on other sites
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