Quote:
the 123 is imo an expensive alternative for the so not talented mechanic.
its still a dizzy (for people who prefer the classic look and who demand modern electronic, this might be the "only" reason to invest):
why i say this:
its still a rotating dizzy with a cap, a finger , a sparc which has to jump from the finger to the cap.
a dizzy-less solution like Megajolt or Nodiz is the "modern" way to go:
full electronic, no rotating parts, no wear parts but you need some knowledge in fabricating and spannering (installing a trigger wheel to the crank pulley for example)
so if you have the money, if you prefer an easy installation and if you are not so talented in fabricating: go for the 123
if you a good inspannering: got for the Megajolt or Nodiz.
if you are on a tight budget: go for a simple hall-effect module.
this said: both full electronic solutions (Mega and Nodiz) can be extended by a TPS, where you than have a full 3D mapping available.
3d Ignition with the correct mapping will really change such an oldschool engine.
Ask the Ford Escort or the Kitcar-Guys....most will tell you "installing the 3D ignition transfered the engine in a way that i thought i gained 10-15BHP"
I have to correct this, true the 123 dizzy has a cap and rotor but that is where the similarity to a normal dizzy begins and ends. the 123 has no mechanical bobweight advance, the REAL bugbear of old school distributors, instead it has a fully mappable setup inside like the best Megajolt/Nodis systems.
Because of the design of the Sprint engine, where the jackshaft drives the distributor, which, in turn, drives the oil pump, it is impractical/impossible to delete the distributor entirely, even if (as I would) you go for a crank sensor and EDIS.
So you might as well make the most of this design oddity and use a 123!
Steve
PS We used Mahesh's 123 fitted Sprint on the 2018 RBRR, 2166 miles in 50hrs 1 min. It performed faultlessly, went like a train and averaged 43mpg over the distance. And that's still on SU carbs. Its a brilliant bit of kit and well worth the expense IMO!
Mahesh has the cleverest cost option, bluetooth connectivity that lets him tweak the map from his PHONE!
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