Megasquirt reads NGC crank signal. Need testers...

[boost junkie]

FYI, steve @ rs-autosports just had a VB failure. He was running 4.2ms dwell. It's probably too much. Need to figure out why we need to run that much dwell in the 1st place. BTW, this is not ngc related info. Seems AEM has to run tons of dwell time too....

[punkrokdood]

has anyone tried an MSD or screamin demon coil pack with the MS? I'm wondering if maybe the reason those coil packs blow up easily on our cars is because they run so much dwell from the factory. maybe a higher voltage coilpack running less dwell than you would on a stock coilpack would clear the issue, as well as not blow the VB's

just a thought

[Glacius]

i have a screamin demon on mine right now, but my MS isn't up and running yet

[punkrokdood]

Quote: Originally Posted by Glacius

i have a screamin demon on mine right now, but my MS isn't up and running yet

ok... if possible, could you try it out with a stock coil, and see if you get the breakups, then swap coils to see if it fixes it?

if it is indeed a dwell issue, this may be a relatively easy fix

[baneonrt]

Quote: Originally Posted by boost junkie

FYI, steve @ rs-autosports just had a VB failure. He was running 4.2ms dwell. It's probably too much. Need to figure out why we need to run that much dwell in the 1st place. BTW, this is not ngc related info. Seems AEM has to run tons of dwell time too....

Yep, sure did. Neither module looks like it overheated but it seems over the 3000 miles or so I ran it at 4.2ms it degraded and failed. I'm running 4.0ms right now but have only been doing that for a couple hundred miles and at low boost levels (like 7psi). It does rev to 7400rpm without problems but I haven't tried it at 13psi which is where I had trouble before and had to raise it to 4.2ms.

Has anybody hooked up a scope to the stock system and see what kind of dwell the factory runs?

Steve

Edit, in light of the 6200 rpm problems everyone is having I should probably clarify that my neon is a first gen since I mention above the ability to rev to 7400rpm.

[NemoFoss]

Dwell is rpm dependent.. and should change with rpm.. Isn.t there a auto dwell feature on mega squirt..

[NemoFoss]

Quote: Originally Posted by barrr

No, but it seams to be affecting all the stand-alones

Here's a link
compiling info, 6200rpm breakups on standalones

It does'nt effect the electromotive tec3r..

[2001dodgeneonrt]

there is an auto feature but boost told me not to use it, cant remember why though. maybe he can chime in.

[boost junkie]

There is no auto dwell that I'm aware of.

[2001dodgeneonrt]

duty cycle...
this is quoting the note on mt
these times are for 12v. battery correction is applied.

at higher voltages the time is reduced and when low it is increased.

not sure if this is for fixed or duty?

[2acrguy]

Quote: Originally Posted by NemoFoss

Quote: Originally Posted by barrr

No, but it seams to be affecting all the stand-alones

Here's a link
compiling info, 6200rpm breakups on standalones

It does'nt effect the electromotive tec3r..

its not effecting all standalones only the ones that use the stock crank tigger and sensor

[firegryphon]

This is probably a stupid question, but could it be that the signal from the hall effect sensor hits some resonance (RLC) at around that rpm which reduces the signal to noise ratio to the point that you can't reject the noise?

[boost junkie]

Hook up a scope and find out.

[ayoungblood]

So this is at a stand still right now?

[Glacius]

i just gotta get all my orders and all done and I can start on mine. Trying to have megasquirt up and running for nopi