9 replies to this topic

[simini22]

Hi newbie question well new to forum not minis! has anyone got experience with this? do you rate?
i've got a 1380 286 cam stage 3/4 head that needs a new dizzy (still the old 998 one!) and am thinking of getting one
but not sure its worth it.

[Ethel]

How much money?

We've all got megajolt mania

[Big_Adam]

Maybe a metro electric 1275 one. Curve might suit the engine better.

[miniboo]

personally i dont think it is worth it. go to AC dodd and get him to give you the perfect advance curve for a normal dizzy for your mini.









or go megajolt lol.

[Jupitus]

... or H-H ignitions solutions.....

[Retro_10s]

personally i dont think it is worth it. go to AC dodd and get him to give you the perfect advance curve for a normal dizzy for your mini.

I'd agree with Miniboo on this,... Even with all the Settings on the 1-2-3, none of these will be spot on for your car,... where as the good mr AC Dodd will get that Dizzy absolutely spot on for your car and you will be a very happy man indeed.

[dklawson]

I won't defend the cost of the 123 dizzy but Marcel Chichak did a lot of research to determine the selectable curves built into the distributor. They aren't arbitrary, they're based on his years of work building and testing of A-series engines.

NO ONE, and I mean no one, will magically pick the perfect advance curve for your car. Talk to the experts and they'll tell you that you have to dyno tune the car and determine (at several different engine speeds) what your advance needs to be for YOUR engine. Once you've collected that string of data points they go back (on a traditional dizzy) and adjust weights, cams, and springs to get as close to your engine's ideal curve as possible. Read this as multiple sessions on a rolling road and multiple tweaks of the distributor on the bench with an old-time dizzy machine.

The 123 has 16 switch selectable electronic advance curves to fit a wide variety of engine builds. No, you may not find one that's 100% perfect for your engine, but you'll find one that's close. The 123 costs a lot but compare that to the hours of dyno time and bench time with a pro custom building your distributor and the cost of the 123 won't seem so bad. AC may tell you that XYZ advance curve will fit your engine, but that's the same procedure Marcel used with the 123. The advance curves were selected based on years of testing and experience. Whether you're talking AC or 123, an off-the-shelf advance curve will be a compromise close to what your engine needs, not a 100% perfect match.

Consider it the difference between buying a suit off the rack vs. having one custom tailored.

[simini22]

well that seems balanced. i know i'm not gonna get the perfect curve mapped ignition is the only way for that. i probably should have asked if they were reliable. i've just had it on a rolling road and was advised an aldon yellow would be a good fit. i'm looking for good reliable consistant power not ultimate figures the estate is supposed to be my practical fun car. i'm hoping to take it with tobox and trailer and family to imm next year but need to prove its reliable to her in doors. sofar im failing the longest its run is 4 weeks when i had to use it for work.

[PhoenixSimon]

ive bought a 123 as compared to other more custom options it was a similar cost, looks standard and so it quotes is reliable, im not after ultimate performance I just want to turn the key and drive away without any hassle.
Not had the car running yet but hopefully it shouldnt be much longer and I will tell you how I get on with the dizzy.
Simon

[Jupitus]

My dizzy (not yet fitted, mind, although RoadRunner is using similar) cost me under £100 from H&H Ignition solutions (featured a few months back in a popuolar mini mag)... They too a standard electronic ignition dizzy which I got off ebay, took details of my engine build spec and then refurbed and custom made the dizzy they sent back.

I can't say yet if it's mega quick or whatever, but I'm making the point that they can be alot more cost-effective than others.