I was talking to some friends /w neons at the track yesterday and they brough up an ECU system that they use. Its totally modular, sensor-wise, and the controller itself is open-source /w a really nice programming API. In other words, YOU tell it what happens to each reading.

From this, we could essentially take any reading from the ECU and modify it. We could coorelate any of the readings together (IE: if running nitrous, only inject at WOT between x and y RPMs, etc. Or dynamically alter injectors to get an optimal air/fuel. u get the idea).

anyway, the system was 'wet-'something. i cant remember the name. anyone know what it is?

thx!

 

Yes I need a way to retard timing during nitrous use..

 

I found it!

http://www.megasquirt.info/

awsome! you may be able to use it. if you need help /w the coding, let me know

 

Hm...This is interesting. In theory you could build a harness and use an Xede for just about any modern vehicle. I didn't know there was a general purpose piggy back with full source support.

On a sidenote: the xede might have a open source and cross platform software coming soon.

d

 

is it like a datalogger? If so, it just reads the sensor. It can't change it like GM's ecu device thingy.

 

It appears to be a full fuel injection controller with inputs for the O2 sensor, throttle position, etc. The website is very upfront about the stuff it can't do like spark advance. EDIT: nixed the end of the sentance as it was incorrect.

d

 

it can literally do whatever u want it to do. this would be very interesting to integrate with a CF or SD card from a PC104 embedded system for on-the-fly loging, as well.

but its not just sensor for logging, its also signal modifiers (like the RRM piggy) and and run soleniods (for nitrous or about anything else). all the action can be customized. for a computer geek meets car geek such as myself, its like the greatest thing ever =)

 

I just noticed this. Although their MAP sensor is limited to 20 psi so we 4g63 people would have to find another sensor source.

I still don't think it can adjust the ignition advance though...

BTW: A while ago I started a thread to get a homebrew engine managment section going, but I haven't gotten any response. I know that there are a quite a few people interested -- we just need to get organized.

https://www.evolutionm.net/forums/sh...ad.php?t=99416

d

 

http://www.megasquirt.info/manual/3bar.htm

The stock MAP sensor is a 2.5bar which can read 21.6psi. You can get the GM 3bar MAP sensor to take about 29psi. Its $60-$80, so they say. The pin-outs are on the site. they include the code and hack instructions to reflash with it.

like i said, coolest thing ever =) and I agree: engine mgmt section would be nice! i'll post to ur thread =)

and ur are right, it doesnt do igntion timing YET. they are working on it. read their forums for more details. its an open project, so feel free to contrubute!

 

I feel like I'm pimping for Greddy but, isn't this essentially what the emanage does? I am a little biased since I just got mine in the mail yesterday... It does look like a good deal if you're handy with a soldering iron though. It looks like it can adjust timing but how do you get it to only squirt nitrous between x and y? Do you know if that's an option w/emanage? I keep yaking about my budget so anything cheaper is cool in my book but it looks like a PITA to me! I just checked the pre assembled prices and couldn't believe the price jump! Ouch! Start practicing on your old radios. You can only afford to screw up a couple of times. Looks very promising though. Let me know how it works out!

AMG

 

As for form and function, a good standalone ECU or commercial piggy back system is probably better for most people. However, a lot of us just like working on the stuff ourselves. For the time being DIY kits don't seem to be either cheaper _or_ easier than systems like the emanage or an AFC. For the old school hacker types, doing it yourself is a whole lot more gratifying though.

Note that when we say 'free' here we aren't talking about price. Personally, my number one desire is to have the freedom to do whatever I want with my engine management system. That requires access to how the device is designed and built. Price is a somewhat distant second concern.

EDIT: not to blow everybody's mind, but imagine if there was a free (both kinds this time) reflashing systems available? That's what I _really_ want.

d

 

I guess your signature says it all! j/k I understand why someone would want to do it, but I worked in 2 arcades for ~3yrs total. I can solder with the best of them, but I still wouldn't want to risk my engine over 1 cold soldered point! Ya know what I'm saying? It looks cool as hell, a few years ago I would have been on it in a heartbeat. Now, sadly enough, my arthritis is kickin in @ 32... Okay bs aside, I'm too lazy to spend a couple days soldering it together and I'd probably rush it at the end and pop the caps in my ecu okay!!! I'm not bashing on it, I'm just hoping(praying) that the emanage works better for what I need. I really do want to know how it works out though. I can always sell the emanage and dedicate a couple weekends to doing the megasquirt kit right. I just don't have the time right now (plus I allready bought the other) to do it.

AMG

And don't forget to drink your ovaltine!

 

Well, the website also indicates the this 'squirty' thing comes with a tester as well. I wouldn't want to put it in my car, have the mix go lean, then have my beautiful evo motor go ka-blewy either.

Personally, I'm not going to try this kit out. My xede works perfectly well. Vishnu provides high quality base maps at no cost and chiptorque is being very cooperative about the protocols they use for the 'official' software.

EDIT: Yes, but my sig only tells half the story. Not only do I choose my bicycle over the evo for my commute, but it's 30 miles! I figure that's the _best_ way to further the weight reduction on my already featherly RS.


d

 

i dunno if im ready to go for it just yet, but it def looks like a very promsing platform. im willing and able to do this kinda stuff and it would be nice to able to expand the toys. maybe add a MIVEC control to it to start. that, and unlike the evo, the RA is very limited in what is available. if i gotta do the work to get ANYTHING to function, may as well do it with something that interests me!

 

It seemed like a decent site. Ask them if they have support for "Vtec"!! I actually didn't read all of it to make sure they didn't! I may be wrong but I think it's just another voltage regulator that opens up MIVEC isn't it? I know it's hydraulic blah blah blah, but it's electrical vs say centrifical force that actuates it right? I'm sure there's someway to hook it in there. The code to control it may be a different story though. It never hurts to ask!

AMG