edit* disregard any of that babbling. some how it must compute the time of the neg slop compared to a referance, into how long of a pulse to send to the edis?


i got nothing for that lol. your thinking out loud is so over my head its not even funny.
















so in that 2nd circuit using the Motorola MC68HC908QT4 microcontroller, our ecm output which i belive is R on this pic



would be put into where the risistor pot is now that verys rpm? bised by some risistors/caps or something so it triggers on the down slop, then write some code to make it all work?

i'm guessing the edis figures out dwell all by itself and the ford icm to ecm is something our ecm can use?

j91z28d1n2o wrote:

QUOTE:
edit* disregard any of that babbling. some how it must compute the time of the neg slop compared to a referance, into how long of a pulse to send to the edis?

i'm guessing the edis figures out dwell all by itself and the ford icm to ecm is something our ecm can use?

Yup. You'd have to set up one of the timers such that it would start counting on a falling EST edge, and stop counting on the next REF falling edge. This would give you ECM commanded timing (as a time period), which it could translate into SAW.


The EDIS module apparently does dwell on its own.

to bad i don't remember much of anything from digital class all those years ago, but even then triggering on the neg slop only was prob more than i could pull off. wouldn't that take some kinda logic gate? setup as a latch.. random guessing at best.


you make things sound to easy dig... freaking smart people hahaha






anyways. i ran across these videos. looks like a 454 tbi motor running on the n* setup. no clue on ecms thou




http://www.youtube.com/watch?v=zokjO2aULIM


http://www.youtube.com/watch?v=0w6LeLHKMRI&feature=related





i so ran a quick search for the coilpacks and icm thru car-parts.com and there seems to be a few listed within like 20miles for around 50$.

I was looking at some LS1 info last night,
Has anyone tryed using a LS1 crank sensor and reluctor wheel which has both 24x and 4x and one sensor.
I don't have a northstar dis unit to test this.
I know you can get 24x reluctor wheels for conversion from 58x when putting a L76 on a ls1 pcm.
I could be wrong but would gm change things that much if it works in a nothstar engine with two sensors adjust reluctor wheel to use one sensor with two outputs to save money.
Then again I could be way off the mark.

Apples.

I never even thought to look.


I'll do some searching, but your saying the 24 tooth ls1 wheel is really a 32 tooth since it has the 8 odd teeth like the n*. or it doesn't have the extra teeth yet can still output the x4 only is doing it in one sensor?


wonder how they are pulling that off. it would nice thou, even if the ls1 wheel is in the back of the crank. still easier to atleast see what the thing looks like.

The LS1 reluctor wheel is two wheels in one.
I have found a picture of it.
I dont know how you get 4x looking at the reluctor wheel.
Apples.