Obsolete hardware
Posted: Fri Dec 22, 2017 5:19 am
So I'm almost certainly going to cause an uproar here but I need to vent a bit.
I see lots of posts all over the forum where people are having trouble with obsolete old school EFI hardware. I.E. EDIS, DIS and low impedance injectors. When MS was in it's infancy and we were using slow processors and had very limited choices on crank signal input decoders it made sense for the very same reasons OEMs developed the hardware to begin with. But like the automotive industry MS has evolved. Current MS2/Extra code supports over 25 native trigger patterns and the generic wheel decoder allows you to run a crank trigger on ANYTHING you can fit a wheel to.
Ford's EDIS went out of production in 1997 and has some serious limitations including a non adjustable internal rev limiter.
GM's DIS stayed around longer but has always been a little tricky to get it working correctly with MS. Module reliability has been an issue and there are so many variations finding the correct wiring info can be tough.
Low Z injectors are still around but unless you are running exotic fuel ( methanol, propane etc...) or trying to make very big power per cylinder the glut of relatively inexpensive Hi Z injectors now on the market makes it seem foolish to me to deal with the hassle. And old Low Z injectors have mediocre spray patterns and tend to be very very noisy electrically.
There's also the issue of finding quality parts for both EDIS and DIS. EDIS wiring harnesses cannot be found new period.
This isn't to say that some of this sub components aren't still useful. EDIS trigger wheels, sensors and coils work great with a Quadspark or the appropriate number of BIP373s in the ECU. GM DIS modules and coils also work well if you gut the module and convert it to a "dumb" coil pack driven by BIPs or a Quadspark....easy to find at the junkyard, nice hot spark and every parts store around still carries coils.
Ok rant over
I see lots of posts all over the forum where people are having trouble with obsolete old school EFI hardware. I.E. EDIS, DIS and low impedance injectors. When MS was in it's infancy and we were using slow processors and had very limited choices on crank signal input decoders it made sense for the very same reasons OEMs developed the hardware to begin with. But like the automotive industry MS has evolved. Current MS2/Extra code supports over 25 native trigger patterns and the generic wheel decoder allows you to run a crank trigger on ANYTHING you can fit a wheel to.
Ford's EDIS went out of production in 1997 and has some serious limitations including a non adjustable internal rev limiter.
GM's DIS stayed around longer but has always been a little tricky to get it working correctly with MS. Module reliability has been an issue and there are so many variations finding the correct wiring info can be tough.
Low Z injectors are still around but unless you are running exotic fuel ( methanol, propane etc...) or trying to make very big power per cylinder the glut of relatively inexpensive Hi Z injectors now on the market makes it seem foolish to me to deal with the hassle. And old Low Z injectors have mediocre spray patterns and tend to be very very noisy electrically.
There's also the issue of finding quality parts for both EDIS and DIS. EDIS wiring harnesses cannot be found new period.
This isn't to say that some of this sub components aren't still useful. EDIS trigger wheels, sensors and coils work great with a Quadspark or the appropriate number of BIP373s in the ECU. GM DIS modules and coils also work well if you gut the module and convert it to a "dumb" coil pack driven by BIPs or a Quadspark....easy to find at the junkyard, nice hot spark and every parts store around still carries coils.
Ok rant over