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

Bruce Bowling wrote: 2) We have eliminated the on-board ignition drivers (BIP-373), there is only logic-level outputs. For some installs, the flyback noise (350 volts) from the BIP373 caused a lot of issues and noise - it is hard to keep this away from other wiring when its all on the same connector and small form factor. So an external ignitor box will be required for installations, which is not a problem since many installs went this route anyway. And, there are plenty of low-cost drivers available as kits or from OEM setups. And by keeping the flyback noise far away from the sensitive input signals the Microsquirt will be happier.

- Bruce

Just a quick question. I'm trying to determine which microsquirt I should use. I'm trying to retrofit my 83 v65 Magna with efi. Its a v4 with dual pickups to trigger the coils. I don't know the proper name for the ignition sytems because the manual simply refers to it as transistorized ignition If I'm understanding correctly the older version microsquirt would fire the coils directly whereas the new version would require the use of the ignitor boxes? Would I still have timing control through ms if I used the boxes? My understanding is that the oem boxes control timing.

How big of an issue is noise? Can it be fixed by using a shielded/grounded cable?

TIA.

The OEM TCI box does control timing. You can keep the stock TCI and piggy-back the uS for EFI, but you won't have any control over the timing. If you want timing control and you buy a new-model Microsquirt, you'll need to fab or buy an external 'dumb' ignition driver box controlled by the uS.

I working on a project with a Briggs & Stratton Vanguard 35p engine.
The new version of MicroSquirt is perfect for me because it is more waterproof.

The only ting I wonder is what kind of "external 'dumb' ignition driver box controlled by the uS" can I use. Is there any ready to us solutions for this that I can use?
What have other use that have use the logic output from MicroSquirt?

Is there any coil that have this driver integrated that I can use.

The old MicroSquirt was perfect when it has all function included, but I think the new one is better for me when it is waterproof and put the ignition outside may be a good choice.

GM LSx coils are a great choice if you want something cheap with a built in ignitor.

Is that not the same as IGN-1A Race Coil that you sell?
Then shuld two IGN-1A Race Coil work together with the new Microsquit to a Vanguard V-twin 35hp?

IGN-1As are hotter and a bit larger than LSx coils. Same idea though - they take a 5 volt signal.

If you do not want to use coils with built in ignitors, Bosch has 1, 2, 3, and 4 channel ignitors that are quite compact and robust.

Tank you for the tip!

Has anyone tried an MSD 6302 dual channel ignitor? It looks to me like they do the same thing as a Bosch 0227 100 200 dual channel ignitor, but they're a little cheap and don't require special connectors.

Mk1rocco wrote:Has anyone tried an MSD 6302 dual channel ignitor? It looks to me like they do the same thing as a Bosch 0227 100 200 dual channel ignitor, but they're a little cheap and don't require special connectors.

As it's intended to drive a DIS-2, not a live coil, it may not be able to handle the current or flyback spikes of a real coil.