Autosport Labs

Get a Wideband Oxygen Sensor or visit a dyno shop and have them stick "the sniffer" in your tailpipe and check for lean outs before you casting evil looks in the direction of the ignition system.. It is far more likely to be a fuelling problem, especially with carbs, turbos and other compl...

Um.. It looks like too much circuitry and code for a general "comments and suggestions ?" request. Do you have any specific areas you want suggestions on ? Otherwise, any potential readers would need to familairise themself with your whole purpose, design, code, build it themself and see i...

You just need some timing software.. if High-Current continuously for >x sec then stop type stuff.

for a huge range of servos and related mechanisms that ships anywhere
http://www.servocity.com/index.html

A few possibiilties.. Add a low value current-sense resistor inline with the motor, amplify the signal with an op-amp and feed it into an analog input on the arduino. Measure the voltage while moving, if it reads too high, you know you have hit the motors limit (or have a mech problem), so stop movi...

I would start with whatever plug-gap most people use on your type of engine configuration with a standard ignition.. turbo, carb, VW etc. rather than what the EDIS might be able to handle to start with. That way the advance curve and bahaviour will be similair to what other similair configuration en...

OK, So far so good. Have you checked that the timing is actually moving with a timing light on the crankwheel ? Its unlikely, but possible that the SAW wire from the MJ to the EDIS module is open, which would cause the MJ to think it is modifying the advance and show so on the screen, but the EDIS i...

The perfect Spark Gap is determined by how reliably your system can fire that gap under pressure. Theoretically, a bigger gap means a larger initial fireball, less time for flame front growth to reach peak pressure, and therefore, *less* advance required, since faster flame growth means you dont nee...

OK, So its probably not an engine fault if it used to work on the dizzy... unless other work (or unknown changes) were done in addition to fitting the megajolt. No Vacuum leaks ? Is the MJ reading the boost pressure correctly on the MAP sensor ? Have you monitored the 12v supply (to both the MJ and ...

The first question is.. Was it "running out of puff around 4500" on the dizzy *prior* to fitting the Megajolt ? You could have a mixture/fuelling problem that no amount of fiddling with the ignition curve will cure. The easiest way to tell for sure is get a Wide-Band-O2 sensor in the exhau...

I'd be interested if anyone knows of any actual test results that show *any* significant improvements resulting from multi-spark ignitions - when compared against *equivalent* non-ms ignitions. Tests where you replace an old points system with a Hi Energy CDI system mean nothing, since you're not co...

I dont know what the vacuum port on an SU puts out. Given that they are vacuum operated slides, the port might be putting out the vacuum drop across the venturi (which I guess operates the slide/needle) or something weird like that, which would explain your backwards load movement. Any SU gurus list...

Its too hard to see whats happening properly in your video sorry. It looks like your load axis is moving backwards.. but I cant see it clearly enough to be sure. Back to basics.. disconnect the Megajolt controller altogether (unplug the big plug from the silver box). Get the car starting and idling ...

Hmm, I was hopeful until I read this page.. http://www.bgsoflex.com/mjl/mjl_edis_summary.html this is the worrying bit.. "Note that the SAW pulse must be synchronized with the PIP negative-transitioning pulse - it cannot be applied asynchronously to the PIP signal, otherwise incorrect advance c...

*Theoretically*, it would depend on how you go about tuning it.. I saw a graph of combustion pressure vs time in an ignition book once - Like most fireballs, spark-initiated flame growth rate is exponential... It takes much longer for the fireball to go from 0.02" dia to 0.04" diameter, th...

Syncing up the curves in two seperate Megajolt Units while programming them would be a PITA though.. You would have to have a switch to change the serial port from one to the other and make a change, hit program, switch the switch and repeat. You could *try* a single Megajolt controlling two EDIS un...