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EOI: Small megasquirt group buy 

 

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Posted: Mon Mar 07, 2005 7:46 pm 
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Quote:
24 MHz HCS12 processor (C32 or C64 version),
Fuel control to 1 µsec (100 times more resolution than MegaSquirt),


That was on the MSII page.


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Posted: Tue Mar 08, 2005 11:18 am 
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EDXR8 wrote:
unclewoja wrote:
All duty on goods originating from teh US is now duty free. That is as of 1 Jan 2005


Not true, there are still charges but they are hevily reduced if they come from the US. I just recieved an email from customs and it looks like most things from the US are 5% now, so you would be looking at 5% duty plus 10% GST.


I import stuff from the US.... USD$600,000 in a good year. We don't pay duty as of 01/01/05 and I have been told by customs that that is for ALL goods coming here from the US (except cars). If you're getting charged duty, that 5% is going straight to the customs officer's pocket.

Last edited by unclewoja on Tue Mar 08, 2005 11:23 am, edited 1 time in total.

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Posted: Tue Mar 08, 2005 11:22 am 
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JOSE wrote:
Damn, id like to keep my tripcomp (not a huge prob though, the novelty has worn off), does anyone know if it would be possible to keep my standard ECU and get it to run the tripcomp, or make some kind of device to calculate the injector duty cycle for it ( i thought it used injector pulse width to calculate fuel usage - if so could it run directly form MS?)

Thanks for the offer of assisatnce, once i get a couple of (BIG) things fixed on my car i will probably buy one of these kits.


Injector pulse width and injector duty cycle are completely different. Injector pulse width is the time the injector is open for each pulse. Duty cycle is the time the injector is open in total.

I.e. Lets say you calculate duty cycle every 100ms and you have 80% duty cycle. The injectors are open for 80ms every 100ms. Now, I can have the injector open for 80ms by having them open once for 80ms (pulse width 80ms) or 4 times for 20ms (20ms pulse wdth) or 8 times for 10ms etc etc.

As you can see, same duty cycle, different pulse widths. Max pulse width you can have is 25ms though.
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Posted: Tue Mar 08, 2005 1:59 pm 
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Quote:
Pin 5 Green/Yellow To Fuel Injection PWM Output on EECIV Pin 34 - Middle Row on EEC connector, 4th Pin from center bolt (Outward) - Green/Yellow (For 3.2, 3.9-EFI,3.9-MPEFI, 4.0-MPEFI, and V8 Models)


I just pulled that from the doco on adding a tripcomp to an EA-ED, if you read the start it says "To Fuel Injection PWM Output on EECIV Pin 34 " im pretty sure PWM stands for pulse width modulation, so it could be possible to get this info to the tripcomp, (not sure how though at the moment)

what kind of data could i expect from this line, is it signal that says "Pulse width is xxx", or is it a signal as in "injectors are firing" and the tripcomp figures the PW from this?.

If its the latter im ok, if its the former i give up.

 

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Posted: Tue Mar 08, 2005 2:12 pm 
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Guys, regarding the MS... thought you may enjoy reading this.

http://www.corral.net/forums/showthread.php?t=600432

Probably more relevant for the MAF V8 but the I6 owners may find it interesting, all about setting up and tuning the MS on a SEFI MAF V8, including the 'switch' to bank fire, installation of sensors etc. MAP is built into the MS unit.

Not all of the pictures work but many do. Software looks quite impressive.

 

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Posted: Tue Mar 08, 2005 4:54 pm 
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Interesting read that...

unclewoja - how did you go about making a harness, did you just splice into the ECU within the cabin? or did you just run all new wires all together??

If you splice into them, and keep the ecu still there, the trip computer would be fine?


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Posted: Tue Mar 08, 2005 4:59 pm 
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I doubt it. You will essentially be removing injector pulse width control from EEC and assigning this to megasquirt.

EEC will still be calculating injector pulse width as it does now, but the injector will not be conncted as megasquirt will be controlling them. The trip computer will be based on the calculations of EEC.... for it to be accurate, you would need the injector calcs of MS to be used in the trip meter.

So it will most likely work.... but the figures wont be accurate.

 

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Posted: Tue Mar 08, 2005 5:02 pm 
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Yeah, point taken... Thats what I was thinking. Meh, they aren't that accurate anyway.


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Posted: Tue Mar 08, 2005 5:34 pm 
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WTF is a megasquirt and what does it do?
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Posted: Tue Mar 08, 2005 5:36 pm 
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lol... check out http://www.megasquirt.info

Its basically a standalone unit, which controls the injection of fuel. With newer version controlling spark aswell. It has all these other cool feature, like fan control, water injection control, and some other other s**t. It is tuneable in real time, and has ALOT of support for it.

It comes as a build it yourself kit. You do the soldering, and put it in, download the tables onto it, and then tune it. Realtime if you want. helps if you got a laptop, or a in car computer.


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Posted: Tue Mar 08, 2005 5:39 pm 
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justfordima wrote:
lol... check out http://www.megasquirt.info

Its basically a standalone unit, which controls the injection of fuel. With newer version controlling spark aswell. It has all these other cool feature, like fan control, water injection control, and some other other s**t. It is tuneable in real time, and has ALOT of support for it.

It comes as a build it yourself kit. You do the soldering, and put it in, download the tables onto it, and then tune it. Realtime if you want. helps if you got a laptop, or a in car computer.


Cheers
thanks for that but sounds like ill put it in the to hard basket lol sounds way over my head dam i miss carbys lol
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Posted: Tue Mar 08, 2005 5:42 pm 
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Well, its actually all easy. Hard part for the non electronically minded person would be putting it together.

The greatest advantages of the MegaSquirt would be the cheap price, and the huge support for them. There's heaps of people that have done it, and its worked very nice for them. Its also good for learning about how all these things work.


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Posted: Tue Mar 08, 2005 6:43 pm 
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justfordima wrote:
Interesting read that...

unclewoja - how did you go about making a harness, did you just splice into the ECU within the cabin? or did you just run all new wires all together??

If you splice into them, and keep the ecu still there, the trip computer would be fine?


Cheers


Well, I put it on my Triumph TR7 V8 which had a old Lucas injection system on it. As the Lucas system was fuel only, all I did was get an old ECU, take all the electronics out of it, put the megasquirt in and made an adaptor to go from the megasquirt DB37 plug to the Lucas 35 pin SCART connection.

Now, DB37 plugs are a dime adozen from Jaycar or any other electronics place. So, if I were putting one in the Falcon I'd figure out what wires control injection stuff on teh EEC V. Cut them and solder on a Female DB37 to the wires connected to the EEC. Then, on the other wires solder on a Male DB37. Now, with that setup, the Male DB37 plugs into the megasquirt, and if that goes belly up or doesn't work for some reason, all you do is connect the two DB37 plugs together and you've got your EEC back!

Simple!!
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 Post subject: Re: EOI: Small megasquirt group buy
Posted: Fri Mar 18, 2005 9:57 am 
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ive been looking at ms for a long, long time... id prolly go te whole kit n caboodle

 

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