MicroSquirt.com read only forum (Jan.15,2018)

Hi all,

A number of users have been having troubles with the Hall input and HEI or other modules, while others have not (see: http://www.msefi.com/viewtopic.php?t=18691).

As a result of problems, some people have switched to the MSnS-E mod to the Hall input, some have added a transistor to the standard Hall circuit, and some (me, at least) have started using the VR input circuit for the square wave. These are described here: http://www.megamanual.com/ms2/inputHEI.htm

I intend to modify the assembly guide to instruct users to assemble one of these alternate methods, as all of them seem to trigger more reliably than the standard circuit for some users. However, I would like to know if any/all of these are working perfectly for people.

So this thread has a poll for users of HEI 7-pin or 8-pin modules with either MSnS-E or MS-II.

In additon, if people have comments on any of these alternatives (with any ignition modules), please reply in this thread.

Thanks,

Lance.

Worth mentioning that there was a hope to make the VR circuit the one and only universal tach input. I have not got around to testing this. If it did work then that would be simpler, make for a more uniform assembly (less choices) and save some board space.

James

James,

Yeah, I have tested the VR circuit extensively on the bench with square waves, and I am now testing it in the car. It has been faultless so far on both the bench and the vehicle.

As mentioned in the link above, the VR input circuit is more sensitive to low voltage square wave signals than the Hall input circuit, which is a big advantage.

Before I change the manual to any of the options (MSnS-E, transistor, or VR), I want to make sure that we are solving most people's problems, without creating many more!

Lamce.

Since I am a dummy, I'll ask a question here if I may.

Are you talking about doing away with Optical/Hall sensor input entirely?

The wording and my novice perspective have me confused.....

Since I am a dummy, I'll ask a question here if I may.

Are you talking about doing away with Optical/Hall sensor input entirely?

The wording and my novice perspective have me confused.....

I use a $17 GM 4 wire with a pull up feeding the standard coil style wiring in the Squirt. It has never missed a beat.

AW

How about us crazy dubbers? We are running another setup for our hall sensors. Powering the hall with 5v out of pin 24, this in essance inverts the signal and it gets brought into XG1.

I can toss out some pictures if there is interest. I have personaly setup over a dozen cars with this method.

If the VR input is proven to work in all installs then the Hall/Opto circuit could be ditched and the VR input would be used for everything: VR, Hall, Opto, HEI, TFI, EDIS, GMDIS etc.
Even the "crazy dubbers" would have no need to burn up their stims and could use standard wiring.

James

Sorry I have not been following this but how do you run a VR setup off an old style coil negetive.

whittlebeast wrote:Sorry I have not been following this but how do you run a VR setup off an old style coil negetive.

"Just connect it" is the idea. The pots may need some twiddling.

James