justinjsinclair Posted October 8, 2022 Share Posted October 8, 2022 (edited) Hi all, I am in the process of rebuilding a Jab SP500 with 6 cylinder. I have ordered a Rotec Kit for it which will have alternator and elec ignition. The current Tacho size is 80mm and huuuuuge I am hoping a std vdo or saas 52 mm tacho can be programmed to run off the coil or alternator but I thought I would see if anyone has used the original pickup on the smaller tacho. pics here on yousnaptwitfacebook https://www.facebook.com/media/set/?set=a.434038505494427&type=3 Edited October 8, 2022 by justinjsinclair 1 Link to comment Share on other sites More sharing options...
kgwilson Posted October 11, 2022 Share Posted October 11, 2022 What's wrong with the original? It is the same diameter as the ASI VSI & Altimeter & you will have a big hole to fill in if you go for a smaller instrument & it will not be as easy to read or set rpm. 1 Link to comment Share on other sites More sharing options...
justinjsinclair Posted October 11, 2022 Author Share Posted October 11, 2022 Hi KG, I am doing a new panel, I haven’t decided if I am keeping the 80mm ASI and Alt, the Tacho takes up a lot of room and I have a pretty healthy case of OCD when it come to instruments. At this stage I just want it all neat and tidy. 1 Link to comment Share on other sites More sharing options...
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