11 replies to this topic

[Jellevandok]

Hi there,

I'm wondering if anyone has any experience with the 123 ignition system. It seems like a good product but I've also read that people weren't happy when running above 6500 rpm. There is a guy selling his on ebay saying he's selling it due to not being able to find the right advancement curves. As I'm building a trackday car with a 1380 which should go up to 7000 RPM... Interested if someone here can tell me about his/hers experiences.

Jelle

[northy]

+1

[oliver122]

defently get a mega jolt if its going to be a track day car, especially if it will be constantly being revved hard

[Gulfclubby]

Well, you could go for a 123 tune. They don't currently offer it for a mini pre-made, but you could have one made or do it yourself. The "tune" is mappable, thus you are no longer dependent on the programmed advance curves (which are designed for the stock engines). Whether a megajolt then still has any relevant advantages over the 123 is beyond my knowledge. From what I understand the only real difference is where the rpm are read from (crank vs. cam).

But I have no experience with either, the Aldon yellow is just fine for me and nicely low tech, too.

Edited by Gulfclubby, 18 July 2011 - 03:05 PM.

[Bungle]

a friend fitted one to his camper and was pleased with the results over the stock dizzy

going over to megajolt would be a alternative with more adjustment

[english-bully]

I run 123 dizzys in two of my minis and cant fault them,never had an issue with finding the correct advance nor any problems over 7k

[MJWarren]

Why does everyone love megajolts?

A 123 ignition will be fine ill be using one on my engine which is also 1380 and will rev over 6500rpm

[Pigeonto]

+1

+ 1 MORE

[mini13]

because they are better,

with the MJ you get a 3d map so you can get a proper advance at part throttle, also it eliminates any spark scatter.

Why does everyone love megajolts?

A 123 ignition will be fine ill be using one on my engine which is also 1380 and will rev over 6500rpm

[mk1leg]

I have a 123 dizzy fitted to my 1380 and before i fitted I always reajusting timming but since I fitted a 123 have not needed to touch it and its so easy to install.......much quicker to install then a megs-jolt ..............

[Jellevandok]

much quicker to install then a megs-jolt ..............

The 123 costs about twice as much, £288.00inc vat or £334.80inc vat. Pretty sure thats the old version as well. So in all fairness it should be quicker to fit. Plus you need a special dizzy cap iirc, at about twenty odd quid.

It still relies on a wobbly timing chain, so isn't as accurate as the megajolts crank fired ignition.

Megajolt about 105 quid, now including rev limiter and serial cable. Plus there will be postage and import duty, if your unlucky. That'll add another 40 quid to the price, 20 quid for the ford bits from a scrappy and 20 to 45 quid for a pulley from triggerwheels depending on what you can do yourself. So about 200 quid altogether, leaving you 88 or 134 quid to get it set up on a rolling road.

At the end of the day, if your really bothered about your timing there is no competition. The megajolt (or similar)is the way to go.

There was a v4 for sale here missing a trigger wheel. Is there a lot of difference between versions? Where can I buy the total package? (including install instructions). What kind of ford do I need the bits from? There is a scrap yard round the corner here so all should be available...

[jaydee]

I run a 123 in the rally car which revs fine to 7k rpm.
Its an extremely expensive item compared to the megajolt.
AFAIK the MJ is fully mappable so it also gives you better option over the 123 which offers you only a choice of curves taken from other dizzies, and most of them are useless.
I use some curves from the first group (a bit more racey) or the curve B -works rally mini- which is a good compromise, but i change settings them very often on that car..
The 123 doesnt come with the instructions and a print out of the available curves, but you can find them easily on the web.