Righty ho.

I am pondering using a diy engine management setup(s) on a pair of vee twin bike engines.

I am used to using MBE systems engine management and emerald M3d etc.

I don't want "megasquirt" or "megajolt" on their own, I just want one box that does the lot, and I know such a thing exists, but as soon as I visit websites like the B&G megasquirt site I see a haven full of people who love writing code etc, which much as I would love to do, I have no time and thus no interest in learning.

Can somebody point me in the direction of a non-geeky type who can supply me with a built up box at a decent price with the necessary bits there so I can wire it all up, create the maps and go!???

Niggles at the back of my mind are the Aprilia crank trigger that I will need to use and the two cylinder, two coil setup.

I am in the middle of VEMS ver 3.2 which is based on the Megasquirt bord with a better fuel table I belive.

1 box fuel and Spark.

support is geek city but thats the fun for me as I am definatly in the Geeks club.

PPC did an article in last months magazine about diferent ECU's will.

Regards

Agriv8

Get in touch with Bill Shurvinton Bill@shurvinton.fsworld.co.uk
He's very helpful and I'm sure he'll point you in the right direction

i have another one !

built by Bill , could do with the money , might not be exactly what you want tho .

bill is the man, he'll supply you with a fully built and configured box that you plug in. You'll just then have to map it.

Couldn't Chris give you a hand? He could solder one up for a lot less than you'll buy one.

I think you should check thre follwing:

megasquirt2

It's the same as megasquirt, but with different processor and software so it can also do wasted spark (EDIS-4) ignition.

You still have 2 boxes, but 1 of them is just a relay box (dumb). You might manage to get them both into 1 box, but then you need to be creative.

As said before Bill Shurvinton is probably your man at least initially. If you don't want to buid it then there a quite a few places to buy a ready built one.
Are you planning to connect the 2 cranks rigidly to effectively make a V4?

I'm planning on building a megasquirt for my XE over the winter. As I'm currently running megajolt for my ignition I think I'm going to build an MS2 with the EDIS for ignition initially - unless wasted spark becomes an option before it gets fitted to the car. I don't plan on using a relay board as I wired the car with changing to injection in mind.

I must start to think about ordering a kit actually... hmmm.

Try www.extraefi.co.uk - they sell ready built units in the UK configured for spark and fuel.


[Edited on 1/11/06 by matt_claydon]

Calvin - thanks, very useful info, may well be in touch at some point!

Chris - no, engines will be independent up until the chain drive from the sprockets, will start individually etc and need to run as 2 x v2, not 1 x v4 !!

Need to sort the crank sensor ring, and find out what teeth it has etc I think.

The engine(s) has a cam phase sensor on it as well.

......just thought, I am being stupid (no change there then!!! ) wasted spark gang fired injector 4 cyl is EXACTLY the same as a vee twin as far as what the ECU needs to know.........

just need the trigger wheel pattern then......now what did the italians do with that blighter!!

...........apart from the fact that the vee is 60 degree, so will be unequal dwell......hmmmmmm

Forgive me for being a numpty, but how do I then set the software to account for the 60 degrees between cylinders?

I have only dealt with systems with fixed firing references before, where 180 degrees is built in to the system.

I have no idea what the human interface of the megasquirt software looks like, and even less clue as to how to move timing reference points in the software!

quote:

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Originally posted by NS Dev
I have no time and thus no interest in learning.

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You could run it with this casing removed and a bolt and locknut to extend the centre of the trigger wheel shaft, it should be sealed from the crankcase by it's own oil seal shouldn't it? The trigger wheel and pickup don't run in oil unless something has gone wrong. Are you looking at running both engines from one system? Why aren't you using the ignition systems of the engines? as long as they are fueling the same they should be in sync. Megasquirt does run ignition and injection from one box, is this what you mean Nat, not MJ and MS needed to run together?

[Edited on 1/11/06 by Peteff]

that's right pete, wanted to check the megajolt and megasquirt were now on box. I saw some really daft things on the USA megasquirt sites years ago when I was looking into making my own ecu, like people running fully mapped injection then using a locked dizzy for ignition with no advance mechanism at all!!!! Any gains made by injection completely negated by having a prehistoric ignition system!!!

Can't use the bike ignitions Pete, its all mapped off one Denso ECU, the crank trigger and cam trigger inputs are needed for both ign and injection.

If the engines are to be coupled by chain then consideration needs to be given to the phasing between the engines to prevent the the engines vibrating on the primary chain. From memory, the old 2 bike engined dragsters used to run the engines in phase, i.e both firing at the same time to stop the primary chains from becoming overloaded, especially around resonant frequencies.

For ignition I would be tempted to lean towards ensuring that the ignition systems are triggered off each engine to prevent variation due to the dynamic angular variation between the engines that will occur with chain coupling.

Cheers,

Colin

[Edited on 2/11/06 by CairB]