Distributorless ignition?

[coise]

Did anybody tried this system?

http://www.millersmule.com/MillersMuleS ... n-kit.html

I ´m wondering if it would make more sense to go for that, instead of the one from Allison´s.
I have a 77 spider with 34 ADF, 40/80 cams, high compression pistons, modified exhaust etc.
I will probably get the 2X Weber 40 IDF next year.

Any inputs would be welcome.

[Daniel]

Depends, If you want something easy to adjust and install go for the allisons unit which would take an hour to install
no special parts needed Mullers kit requires a re worked/modified crank pulley to accept a trigger wheel, a mount for
sensor and sensor etc it's a nice way to go but when it comes to adjusting the advance is when they differ greatly . 1
is simple the other is some work to setup and adjust .

[coise]

What would I need to adjust the advance? Would I need to use a computer with the megajolt unit?
The rest seems to be straight forward, the kit´s got the sensor mount and the sensor included, the crank wheel can also be made to my spec.
Is it a more precise device then the allison´s one or is it more reliable? Just asking...
Thanks.

[So Cal Mark]

the only advantage is that it's programmable for FI.

[coise]

Thanks Mark.
I will probably order your distributor before the summer. Does it fit with the oildipstick that I have on my 77 .

[pastaroni34]

MegaJolt is a fantastic system! Our kit includes everything you need to get going, minus some wire and the time to wire it up.

Here's a few bullet points:
1. Choice of load sensing, MAP or TPS. Correct me if I am wrong but the Computronix kit has NO load sensing and is only RPM based. Load sensing improves idling, improves mileage and reduces back firing off-throttle.
2. Completely mappable via Laptop, there's even a beta software for Android phones.
3. You will have to change the crank pulley but that is included
4. Extra inputs/outputs
a. Adjustment for Intake Air Temp (IAT) - retard ignition timing for hotter air
b. Rev limiter
c. Extra outputs triggered at load or RPM levels, for instance, above XXXX rpm, turn on a shift light, or at X psi actuate wastegate
5. Zero gear backlash, true crank-fired timing.
6. No moving parts.
7. Data logging - you can record data runs of your car to help in tuning.

It is a really great system for retrofitting turbo cars especially. You can use the optional outputs to replace hobbs (pressure) switches, while at the same time retard the ignition, all in one box!

MegaJolt has nothing to do with Fuel Injection, it is spark control only. BUT! If you wish to upgrade to fuel injection later (via MegaSquirt) you can use the existing crank pulley and spark system, AND sell the MegaJolt controller while you're at it.

That being said the Compu-Tronix system is easier to set up, but otherwise MegaJolt beats it, hands down.

[coise]

Thanks Pastaroni34 for all thoses explanations.
Do you guys actually explain where to put the Map and IAT sensors, do you sell them? I´m an ok mecanic but not an engineer, so what seems simple to you can be huge task for me . Also my 77 is not FI nor turbo and is only 1756cc.
Do you have pictures of the system installed on a none FI or Turbo spider?

Thanks again for your patience on explaining things .

[124JOE]

i like this one
http://www.allisonsautomotive.com/produ ... electrical
but i dont have it

[pastaroni34]

I just wrote a short blog post: What Is MegaJolt? which gives a general overview. I am in the middle of writing some more articles to explain in further detail.

I have Intake Air Temp (IAT) sensors in stock, no problem. As for how to set it up the system, where to put sensors etc, I can certainly help guide you through the process. This is something I will cover in my next article. I have various "case studies" of the installed system that I want to show.

I think the biggest problem with MegaJolt is that there are TOO MANY options, making it seem very complicated. The important thing to remember though, is that it can be very basic, and you can add to the system's complexity by adding extra options later.

[So Cal Mark]

While I'll agree your system has an advantage in programming, I'll put my system against any in spark intensity. Our system puts out 60000 volts to 12000rpm. The problem with ignition systems is dwell time as rpm increases. About 5000 rpm almost any system starts losing spark intensity. Our patented electronics control dwell time so that there is no dropoff in spark intensity. If you're running fi and or a turbo and need spark control under varying boost and engine conditions, then there is no question your programmable system is needed. For a non-computer car with a carb, my system offers the best spark possible with a simple installation and zero maintenance

[coise]

Thanks everybody for taking the time to explain yourself the best you can.
I have to say, that this is really interresting. I can see how simple it would be to install the computronix but I also like the fact that the megajolt can evolve with my car over the years. I guess I will have to make a choice before the summer .
Thanks again all of you for patience.

[manoa matt]

I know another foum member who has a motor with almost the exact same specifications as yours and is also running the EDIS system. I'm sure he would be more than happy to share the map he built. You would simply download it to the megajolt unit and could do minor tweeking from there. It may be available on the megajolt forum site.