Urinemachine

I am currently not running stock ignition - but I built a unit that is running stock ignition down in Georgia. I just feel bad taking out my GM coils and sparkplug wires after I spent the money. I may go to stock coils though out of boredom. Anyway, you just need to figure out your firing order - a V6 is different than my inline 6 so I can't help you there, but once you find the firing order, you count every 3 and pair them. So, for instance say the firing order is 153624, you'd want 1&6 paired on Spark A, you'd want 5&2 paired on spark B, and 3&4 on Spark C - this will fire 1 and 6 at the same time (though #1 will be compression and #6 exhaust) and so on, for a "wasted spark" configuration.

Urinemachine

No no, I think you are confusing a couple terms - theres no "mechanical timing" on this car - mechanical timing refers to a distributor/rotor/cap and coil. What I am doing, is I have my stock BMW crank position sensor and stock BMW crank wheel (which is 60 teeth, 2 missing, commonly referred to as 60-2). I don't utilize my cam sensor because I run the car wasted spark, not sequential. Therefore, I spark on cylinder 1&6 at the same time, 5&2, and 3&4, meaning I only have 3 spark events, but fire 6 cylinders, one spark on each event is wasted - that's where the term wasted spark comes from.

Researching and tinkering is half the fun - I often go out to my car and just tweak ---- out of boredom. Once I get done christmas shopping I am going to go flash a new firmware for higher injector resolution and retune. The truth is, once you have a base Megasquirt build going and you understand the principles and basics of how to build the ignition circuits, it's easy to adapt the megasquirt for nearly any car. For instance, I could pull my MegaSquirt out of my BMW and put it on any 4 cylinder, V6, or V8 as long as they are even-firing engines - 99% are. You can even run up to a 12 cylinder but you HAVE to run wasted spark (there are 6 spark outputs) - technically I could run my 6 cylinder on sequential ignition but there isn't much to be gained - its harder to implement the crank sensor AND cam sensor, but also, its batch fire fuel... so there isn'tmuch to be gained until they released the sequential injection board. Once they do I will be switching to that so I can idle healthy (14 - 15afr) on injectors bigger than 42# without hunt. Right now, with the MSNS-E firmware, my idle afr is from about 13.5 - 14.5 and it swings a little because there isn't enough injector resolution to control 6 42# injectors at low pulse width. I am going to go back to the Hi-Res code, which enables much higher precision of injector pulse width (msns-e allows x.x millsec while hi-res offer x.xxx) which really cleans up low injector pulse rates.

The only thing "GM" on my car are the intake and coolant sensors because they are known values and are easy to use out of the box, and also the GM HEI coil pack with the module gutted (so effectively I am just running GM wasted spark coils, sans the HEI module). Other than that, it's all BMW.

96turboracer

There's quite a few neon guys running the ri-res code right now, mainly with injectors ~82lbs, and it's working like a champ for them.

Urinemachine

Yea it sounds like you have a wasted spark firing system already. Tons of cars run it - it makes sense. Rather than use math and hardware to control where the spark goes you use phsyics. The way spark works is that the cylinder with the highest compression (static pressure) is most likely to ignite. This is the reason you can batch fire AND waste spark and not worry about igniting the wrong cylinder - aside from the fact that there will more than likely plainly not be enough fuel to slip past a valve on an unsuspecting cylinder (because mind you even though you're firing fuel on cylinders not ready to fire, the intake valve is also not open, so the fuel sits above the chamber and does not ignite) you are very unlikely (read - impossibly) going to ignite the mixture in that cylinder - thus rather than have technology handle it, simple physics applies.

Yes, the Hi-Res code is very good for small injectors. I had it running for a little bit, switched back to 029t for developmental reasons, and am now switching back to Hi-Res this weekend. I just loaded WinXP back on - I am an MSDN and had loaded Vista (full release, legal version) but I just don't want to deal with driver issues while tuning my car So now I am in XP and will flash my car tomorrow or the next day.

FURACERMAN

Wow cool info.

Urinemachine

Yeah man.

I can't get away from my computer now - I bought this steering wheel setup for it and the GTR2 race game and I cannot convince myself to drive my real car!

Blohardt

You know anything about making MS work for the older sohc m20b2x motors, i'm boosting an 86 e block with i head and although the fuel setup is crystal I really have no idea how to set up ignition other than going straight to a ford edis system and setting up my own crank wheel. Is it possible to utilize the stock crank sensor in these to feed a wasted spark or just keep the single coil system? If not, if you know any info on similar builds out there it would be a great help.

Thanks

Urinemachine

Yeah bro just use MSnS-E firmware (www.msextra.com) and use 60-2 wheel decode, use a singal coil driver to fire the stock coil if you want. Simple on the M20. TONS of config files out there. Check out www.e30tech.com and go to their engine management section.