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> MegaSquirt, revisited ...
SirAndy
post Oct 9 2003, 03:39 PM
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no, this is NOT about porn, you pervert (IMG:style_emoticons/default/laugh.gif)

ok, i just downloaded the Assembler Source Code for the MegaSquirt fuel injection.
at first glance it looks clean and pretty straight forward.

one point of possible improvement i see right away is the "linear interpolation" for "Warm-up and After-start Enrichment" which uses 10 reference points.

if only i had the money for a /6, i would gladly donate my current engine for prototyping (IMG:style_emoticons/default/wink.gif)

B., we should have a little tech session about what we need and what we have and what we want,
Andy
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fiid
post Oct 9 2003, 03:51 PM
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You're totally welcome to my 1.7. It's already got MS.
It's going to be in my car for a little bit though.

Fiid.
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SirAndy
post Oct 9 2003, 04:35 PM
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for those who are interested, the MS runs a 8MHz Motorola 68HC908GP32 CPU, 8-Bit, with 32k of flash memory and 512 bytes of user RAM. programable interrupts, several 32-bit I/O lines and other goodies.

i have not counted the actual code size, but it is way less than 32k, soooo, there seems to be a lot of space for some nice additional code. (IMG:style_emoticons/default/smile.gif)

this will be a fun project!
Andy
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Charles Deutsch
post Oct 9 2003, 06:17 PM
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Collectively, the members of this board could probably make an EFI system for the teener. Some could do the electronics, others could do the software etc.
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DNHunt
post Oct 9 2003, 07:35 PM
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Andy

All of my .inc, .asm and .s19 files are Here. These include lookup tables for the stock CHT and IAT. The board is pretty easy. For a stock 2.0L all my data should plug in and run pretty darned well. People with non stock setups would need wide band O2 for tuning and dyno time to get it just right.

I have a programmer for the chip so I can burn the firmware on blank chips.

Wait til spring and I'll have an ignition system on the board too.

Dave
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Mueller
post Oct 9 2003, 08:31 PM
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Andy,

check out the UltraMegaSquirt,

Different processor (better???, so they say)

UltraMegaSquirt

Also, surface mount components for the new design, everyone is going to surface mount, the old Haltech is not, but thier newer stuff is.
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Brad Roberts
post Oct 10 2003, 12:06 AM
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Spoke to the big chease this evening about Dyno time. His first question was: Does Andy have time for this ?? I said.. well of course he does. 2 weeks before we can even start to get the dyno ready "again".


B
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SirAndy
post Oct 10 2003, 11:05 AM
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QUOTE(Brad Roberts @ Oct 9 2003, 11:06 PM)
Spoke to the big chease this evening about Dyno time. His first question was: Does Andy have time for this ?? I said.. well of course he does. 2 weeks before we can even start to get the dyno ready "again".

(IMG:style_emoticons/default/clap56.gif)

yeah baby, get that sucker on the dyno ...
Andy
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Brad Roberts
post Oct 10 2003, 11:07 AM
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Of course he wants the website done.

We will get there.


Where is Bowlsby ??

I need a offline guesstimate on what a new harness with 3 new connectors will run me (10 for the first batch).



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SirAndy
post Oct 10 2003, 11:10 AM
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QUOTE(Brad Roberts @ Oct 10 2003, 10:07 AM)
Of course he wants the website done.
We will get there.

let's finish eCommerce first. then i'll dive into his web-site ...

can't wait to play with the dyno!
Andy
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SirAndy
post Oct 10 2003, 11:11 AM
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QUOTE(DNHunt @ Oct 9 2003, 06:35 PM)
Andy

All of my .inc, .asm and .s19 files are Here.

Dave,
thanks. that'll help a lot, i'm sure ... (IMG:style_emoticons/default/pray.gif)

Andy
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SirAndy
post Oct 10 2003, 11:13 AM
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QUOTE(Mueller @ Oct 9 2003, 07:31 PM)
check out the UltraMegaSquirt,

it reads nice, but, if i'm not mistaken, this is still in development, right?

Andy
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DNHunt
post Oct 10 2003, 12:08 PM
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Andy

That's correct. Still under developement and that's a 2 edged sword. They work really hard to turn out something that is good but it takes a lot of time and these guys do day jobs. So, things kind of hang out in the "it's on the way" portion of the universe.

It's still a bunch of systems that are being tested. The board hasn't been designed yet

I want a UMS but I'm planning on still using my Megasquirt.

Dave
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mightyohm
post Oct 10 2003, 12:14 PM
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I couldn't find a release date but I think it's going to be a while. Maybe mid next year?

On a totally different subject does anyone know a good place to get oxygen sensor connectors for the Bosch LSU4? I just ordered a wideband O2 sensor kit and I need to build my own harness. The sensors should be here today.
They are the same kind as used in late model VW 1.8T's I think.
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mightyohm
post Oct 10 2003, 12:17 PM
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Oh also if anyone has suggestions for where to put an O2 sensor on a 2.0 exhaust system let me know... Next time I am visiting my friend with a welder in SLO I will see if we can add a bung. I guess the exhaust has to come off. #@*&^@
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3d914
post Oct 10 2003, 12:36 PM
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jkeyzer,

It depends on whether you want to register 2 cyls or 4 on the O2 sensor. Most stock teener exhausts don't converge until the pipes just prior to the muffler. Perhaps a popular exhaust builder there in CA would offer an O2 option on the 914 muffler! Not sure where Dave has his plugged in.

Dave,

Have you been hiding? (IMG:style_emoticons/default/beer3.gif) I've been trying to corner you on the source of the 6-Ohm 10-Watt resistors you use in line with the injectors. Or is this an secret family recipe? (IMG:style_emoticons/default/laugh.gif)
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Brad Roberts
post Oct 10 2003, 12:39 PM
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For a clean install... you will have to pull a Bursch off. Stock muffler..and your guess is as good as mine.

Are you sure he isnt using that resistor inline with the head temp sensor ??



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seanery
post Oct 10 2003, 12:44 PM
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why put it on the muffler, why not the he's?
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Brad Roberts
post Oct 10 2003, 12:46 PM
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You want all 4cyl's. The Bursch has a nice fat collector for this. If I use the HE's.. I would have to have 4 sensors.


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914werke
post Oct 10 2003, 12:50 PM
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Couldnt you create some sort of plate w/bung that would mount between HE's and ANY muffler? Then your down to 2.
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