Autosport Labs

Currently I am sorting out a jetski with an EDIS/MJL but have been sidetracked by my old farm fiat panda 4x4 mini lorry which needs sorting, after 10 years of hard work and neglect. I am tempted to fit an EDIS / coil pack (because I have spare) to replace the knackered distributor and since I hardly...

For installations using good quality, high resolution TPS, would it be useful and possible to add a facility to the MJL to output a PWM (pulse width modulation) to drive one of the new digital RC servos? These servos have unbelievable power, speed and resolution and could drive a throttle directly, ...

EDIS4 on a rotax jetski engine. Modified volvo S40 COPs to be coil near plug.

Now going to use science to explain what Im seeing, based on the theory that my old simple light stays on during the whole spark duration. I don’t know if the new ones just give a sharp flash only. Reading on many websites it seems that 12v Inductive discharge (I think that’s what we have here) shou...

OK tried another EDIS and a new coil (very nice COP from volvo S40). No change. The only bit left is the VR and I just cant believe its that. Will try a more fancy timing light next. The trigger wheel is a standard 4.5 inch fron triggerwheels. Right nunber of teeth and one missing. By the way the en...

How sharp or steady should the strobe image be? With the EDIS alone I was checking for a good 10BTDC but the white mark is spread over about 10deg, from +10 to 0 and gets worse as RPM increases. So it starts in the right place but is not sharp. I have tried 2 lights, both the very cheap in-line vari...

Today I had the Rotax engine running for the first time on a stand with the standard EDIS4 set up. 4.5in trigger wheel and VR from triggerwheels. The sensor has gone in unbelievably neatly as if done by the manufacturer. So far I have no MJL fitted so firing at 10BTDC. All seems OK at idle but it is...

Thanks Alexander. I thought the ford coil pack may be centre tapped to the case but the meter shows this is not so therefore leaving it open is not an option. I think it will be ok if I ground one side and this was confirmed by a bit of bodging in the workshop. Dean. I like the idea of COP but my pl...

Hi. Hope you don’t mind me latching on the end of this coil debate as there seems to some experienced types contributing here. I have an EDIS ready to go on a 2 cylinder 2 stroke. I think I need one output (not both) from each coil to get a spark every 180deg. My question is, what is the best thing ...

Hi again Brent. In your first reply you suggest using one coil channel to fire both plugs. As I need a spark every 180deg I think I will need both channels, using one output from each coil. Is that right? If so that leads me to another question. If one half of a coil is not being used, is it ok to l...

All the ford EDIS bits arrived this morning so I am trying to figure out how to hold the sensor and what size trigger wheel to order. It has just occurred to me that I will be bolting the trigger wheel to the flywheel which on a 2 stroke contains very powerful magnets. Brent or anyone. Is there like...

Wow quick response, thanks. Don’t think I would have a rocket with very retarded spark as water is injected just after exhaust manifold (to help the tuned pipe it says?). The exhaust has a long journey through a water box thing before seeing daylight. Hope you will consider allowing –ve values in ad...

Thank Rich, I see the whole EDIS system, less trigger wheel are available for about j40 and trigger wheels about j14 but think I shall make my own. Brent The good news is that there is loads of room inside the waterproof Mag end for a full size wheel. There are also unused tapped holes perfect for s...

Thanks for that Brent. You wouldn’t believe the flack I’m getting from a US jetski forum even suggesting an alternative ignition system. An original used replacement is about $200 in US and since Im in UK would probably be much more, but thats not the whole point. The Plug on Coil systems (from ebay...

Hi All I just stumbled on this site while looking for an alternative ignition for the Rotax / Bombardier in an old jetski. It’s a 2 stroke twin about 580cc. Ski has 12v system. Current CDI and coils are broken and replacements rare and expensive. A quick search of this site found nothing on 2 stroke...