Megasquirt EDIS issue-Page 2| Grassroots Motorsports forum |

clshore Reader
10/2/22 3:21 p.m.

bentwrench said:
The EDIS reduces a nice 36-1 crank position signal down to a per cylinder signal like a 57 chev.

A 36-1 wheel provides a much more accurate signal for the ECU to use to calculate spark timing than a per cylinder signal.

Again, wrong.
EDIS is capable of resolving to 4us (5/32nd of a degree) for each cylinder ignition event.
The timing can be altered on-the fly with new SAW between each cylinder ignition event.
There is no points bounce, no signal jitter due to mechanical drive backlash (timing chain/dizzy drive gear/centrifugal advance).

Can it be improved upon?
Of course!
Go right ahead if your use case requires it, spend the time, effort, money.

You disparage EDIS as "1960's technology", and then point to "1900's points technology" as better?
Really?

bentwrench UltraDork
10/2/22 7:05 p.m.

EDIS will not allow spark cut rev limiting, what's good about that?

SkinnyG (Forum Supporter) PowerDork
10/2/22 8:22 p.m.

Use valve springs as rev limiters, just like Mother Nature intended it.

Though, those would be a soft cut, whereas the Rods themselves are a hard cut.

clshore Reader
10/4/22 2:46 p.m.

bentwrench said:
EDIS will not allow spark cut rev limiting, what's good about that?

If that's a deal breaker for YOUR use case, then go with a different solution.
(BTW also eliminates just about every points type ignition, unless you fit a rev-limiter box)