Megasquirt - The Advanced Thread -For ADVANCED Discussions

[Hybrid_From_Hell]

Righty Ho then

I have rebuilt your map (again )

Try this, I have done the normal MAP and then everything -12, you may find you can't get minus values in the map, yur call !

I have tweaked both RPM Buckets AND MAP levels and Buckets, so look carefully

Report back - this is PETROL ONLY !

Be carefull when you fire this up - I am slightly worried your Lucas ECU may be running weak, this map is far closer to what you need in terms of any nearer optimum, but with more advance the more care you need on fuelling, the clue would be if it hunts or lurches at a set crusing throttle, this would be part ECU Fueling and or part bigger spark both could = weak, if so lower the lines including 98 and from 1500+ rpms by 1 unit and then retry, ...hopefully you'll still be ok as the spark is medium soft rather than maximum, but you should feel a big difference - again

At non WOT (ie advance) you now have much more advance which will help with fuel consumption, however you also have more advance at WOT inplaces which will give you a bigger smile, then its blended through the Map itself. The heavy fuel consumption was partly due to not enough advance sort of everywhere ish. You could have more yet but I think your ECU wouldn't fuel it properly 9as above) and it would run weak, you could have a EPROM from Mark Adams to get over this, but frankly cheaper to go full Megasquirt .

If when you try it you find its pinking (a sort of odd ratlle and doesn't feel right) back off all cells in all columns 3000a and above by 1 and retry, again I think this should be fine providing the ECU Fuelling is OK, more likley you'll get the hunt at steady speeds than pinking.....

Try this and report back

Nige

[RangeyRover]

Well Done Nige!

Another improvement.

I have a hesitation between 2400 and 3000 RPM as predicted.

There is no pinking that i can detect,

I shall have to work on that area of the map.

When I drive through it goes like a train on the other side!

MJ does not allow -ve values!

PS

I have drawn an Interface diagram for Megajolt, to show what I have done electrically to help others.

Should I post it in this thread, or in a seperate Megajolt one?

[Hybrid_From_Hell]

Hmmmm

Ok save this map, then :

Add "2" to every value in the 2500 column and give it a whirl

then if thats good....and if and only if the dead bit is lower in the rpm range (around 2000 rpm ish) then add "1" to every value in the '2000' column ........................

BUT - If it doesn't feel 'right' or any better at all - either route then :

Back to standard MAP

and add 2 to all in the '2000' coloumn and '1' in all in the '2500' column

.....and then report back with your findings

I will I think probably move this part of the thread to the basic MS Thread as its all about basic tuning

Keep it in the MS threads as MJ is in a way the Spark only bit of MS and its all connected

and Yes post up

Nige

[RangeyRover]

Standard Wiring diagram (from a discovery, cos I couldn't find a range rover one, think that they are the same)

Modified Wiring diagram for Megajolt and RRC 3.9 with Lucarse ECU

[RangeyRover]

Please,

Could someone walk me through the MS versions and explain the advantages disadvantages of each.

OR point me to a thread that does.

There are several different flavours. I already have a working Megajolt system.

Thanks

[FridgeFreezer]

Could someone walk me through the MS versions and explain the advantages disadvantages of each.

OR point me to a thread that does.

How's this: http://forums.lr4x4.com/index.php?showtopic=6759

(The Technical Archive is your friend )

[RangeyRover]

Thanks Fridge.

Interesting read. From that I have come to this conclusion.

MS1 V3 is the one for me

I have a 3.9 Hotwire, with EDIS8 & MJ running already. Anyone fancy evaluating whether thats a reasonable decision?.

As that thread was written 2 years ago.

I know I need 2 lambda sensors plumbing in which bumps up the cost. Any kind of interface required here?

[Hybrid_From_Hell]

Thanks Fridge.

Interesting read. From that I have come to this conclusion.

MS1 V3 is the one for me

I have a 3.9 Hotwire, with EDIS8 & MJ running already. Anyone fancy evaluating whether thats a reasonable decision?.

As that thread was written 2 years ago.

I know I need 2 lambda sensors plumbing in which bumps up the cost. Any kind of interface required here?

^^^^^^^^^^

Thats exactly the syetm Fridge meself BBC and boothy plus others have on this forum

You only need 1 lambda sensor, in the Y pice so it gets both banks, use a heated one BBC has a cheap unipart part number if you ask him nicely

We all use 029V software, best stick with that as then files can be emiled to you

Nige

[FridgeFreezer]

What Nige said

Most auto factors will sell you a universal lambda sensor for ~£30 and exhaust places sell a weld-in bung for ~£5, or my preferred method is to hacksaw 6" of exhaust off the nearest accessible thing at the scrappy which gives you an easy to weld bit of steel with a sensor already screwed into it, usually costs £5-£10. A 3 or 4 wire (=heated) sensor is what you want.

[Steve 90]

Ive been reading through all the MS stuff on the forum over the last couple of evenings as I think I have made my mind up and will be going V8 in the next few months :o There is a huge amount of info, my head and eyes both hurt from digging through it, Infact theres too much and im probably more confused now than I was before :rolleyes:

Just one question (first of many I feel) which is on a bit of a tangent sorry.

Why do people use MS rather than a system like Omex?

The people I know in the rallying world and the only experience ive had of a comp safari motor all use Omex. I have no personal experience of either, Know very little about MS and even less about Omex so i'm hoping some of you guys can give me an idea of the pro's and cons.

I feel I have a steep learning curve in the next few weeks....again!

Cheers.

Steve.

[V8 Freak]

Why do people use MS rather than a system like Omex?

I can probably help here Steve....

MS is fully supported with forums and many people sharing knowledge, free upgrades etc and software to analyse your engines emissions and tune the engine from logs.

Omex gives you a gozillion options to set up a fickle race engine if you can learn for yourself or find someone who will help you learn etc. You cannot tune the engine without rolling road / test bench and some specialist equipment.... Change anything and you may need to go through the cash barrier all over again!

I was lucky to get an Omex unit that had been set up with the engine so not to much to do....

MS has a lot of appeal for the amount you can do with it and the support available on the net.

Neil

[RangeyRover]

Ok fellas,

I'm looking hard at going down the MS route, but I want it to be transferable, and I like the idea of putting it inside a lucarse case. Are the pin connectors the same on flapper versions of ECU as the hotwire version? In other words will it fit on the same plug?

Loads of 3.5 ECU's for not much money but a spare one for my 3.9 goes for quite a bit more.

As i just want to gut the internals and put an MS in the box I'm not bothered what ECU I buy just want to know the connectors are the same?

Alternatively anyone got a dead one they want to donate? please?

[FridgeFreezer]

Ref. the Omex question - they are a company, they advertise, which also buys a bit of sway in the motoring press - just look at how far up Dave Walker's arse Practical Performance car are, even though the point of the mag is saving money and doing stuff DIY if possible they still plug his Emerald ECU's, cheap at twice the price.

MS is the ECU equivalent of Firefox - it's developed by thousands of car enthusiasts working on stuff they want it to do, throwing ideas into the pot, offering help and looking at better ways to do things. It's not someone trying to make money from selling kit & tuning people's cars for them. All the circuits, schematics, software, etc. are open source. If you wanted, you could download the firmware and re-write the program your ECU runs. That's how the "extra" firmware for ignition came about, a guy wanted to add a couple of features, so he did. Then someone else tried his program, thought it was cool and suggested an improvement or two...

I've done 10,000+ miles on an ECU designed by two guys because someone bet them they couldn't make it work, running software written by some guys who wanted to do all the cool stuff a £2k race ECU does but for no money. The NOS control is only there because TSD got bored on his lunch-break

RangeyRover - no they're not the same, you'll need a 14CUX. However, because the two setups work slightly differently you may need to add a wire or two (if you want to run EDIS you'll need to add a few more). It's a fair old kerfuffle to stick an MS inside a 14CUX, I'd think about just how much you really need the thing to be transferable.

[RangeyRover]

Hi fridge,

I'm aware of the pain in making it a redundant system. I'm a weapons control engineer originally, I like redundancy!

I have redundancy with the Megajolt system. I can go back to standard with three wires. (*plus the Ht leads)

Anyway, it depends on the approach. I could try and fit it in the case or just make it a very large adaptor (pass through)

Thanks for answering the question though.

Now for an ad in the wanted section....

RR

[FridgeFreezer]

Fair enough - although I think you'll get bored waiting for the MS to fail

Geoff Beaumont fitted an MS inside a 14CUX, it was a hell of a squeeze. I think he used straight D connectors pointing upwards and a lot of fly leads... there may be some pictures floating around, if not the RR is currently parked in my garden anyway

[RangeyRover]

Pictures are always welcome fridge,

I'm going to document the build separately on a thread.

I want to make it as close to plug and play as possible.

[FridgeFreezer]

Here's the inside of the mostly plug-n-play 14CU version I did:

The few extra wires are on the second D connector.

[RangeyRover]

Good man yourself!

That's going to happen. Inside the box.

All I need is an ECU.

Cheers

RR

[FridgeFreezer]

Bear in mind the CUX is a fair bit smaller.

[aaron_h]

How to get Megatunix on an ASUS EEEPC running LINUX......

I have heard this mentioned before and was looking at the EEEPC for tuning the Megasquirt ECU on the Land Rover for abit. What won it for me was the size of it.

Basically its half the size of the normal 14" widescreen laptop. Great for removing from your land rover if you leave it parked anywhere after logging / tuning etc where a normal laptop can be abit bulky / heavy you can carry this around no problem.

My EEEPC is a 20GB SSD (Solid State Disk, No moving parts like a hard disk) 1024MB of RAM enough to boot a "live cd type os" from a USB stick

its exact model is EEEPC900-W005

The EEEPC running linux has a real user friendly front end..... but, the add / remove programs option only allows you to install asus programs specifiacally for the eeepc. Although they have tried to make it as windows friendly as possible for a linux OS

How do we get around this to install other programs??? The key is in the File manager.

Open this and you will see the following.... Its the KDE file manager. KDE is a well known linux desktop environment opposed to gnome. ---- bit of background info there.

Now you may have to go to the VIEW menu and select TOOLBARS and make sure ADDRESS BAR has a check next to it

now remove all the text from the address bar except the first / like the following screen shot

Once you have removed everything except the first "/" and pressed the enter key you should see the following

Open the "bin" folder this stands for binary. Basically its were alot of the programs executable files are stored.

once opened you will see the following

Your looking for "bash" its a linux shell. (in windows terms its a command prompt much like typin "cmd" in the run dialog box)

if you click on bash it will load the following

then we may need to switch users to an "administrator" the administrator account in linux is called "root" to run commands as the root user you prefix it with the word "sudo" so >sudo synaptic will load synaptic package manager with administrator privileges

to permanently switch to the root user you would issue the command >sudo su followed by the enter key. once this is done you no longer need to prefix commands with the sudo command.

The following are screen shots of this process.

sudo su command

after sudo su command

synaptic command

Synaptic Package manager.

Thats as far as iv got with the screen shots at the moment. We will be using Synaptic package manager to re install some of the packages that we need to compile programs from source code..... such as megatunix.

More to come.........

[LandyManLuke]

Why don't you just turn the asus GUI off so you've got the standard Xandros GUI for installing and configuring programs? you can still switch back to the simple GUI as and when you wish.

[aaron_h]

Why don't you just turn the asus GUI off so you've got the standard Xandros GUI for installing and configuring programs? you can still switch back to the simple GUI as and when you wish.

Thought about that, I also thought about installing ubuntu. or booting my USB ubuntu. Or the easy method.... slap Windows FISHER PRICE XP on it. Then i thought it would be more of a challenge installing megatunix and adding an icon shortcut to the asus GUI therefore keeping it the way asus intended.

I think the Asus interface on a linux os makes it a very clean and easy to use system. I only got it tother day so im probably going to explore all the above methods then decide on which one i think is most practical for use in the Landy

It takes some getting used to typing on it? did you find that?

[LandyManLuke]

I've got pretty big fingers, but it's certainly possible.

I used the script found on http://www.eeeuser.com/ to enable 'advanced mode' in such a way that you can easily switch between that and Asus' GUI very easily. works for me.

[aaron_h]

I've got pretty big fingers, but it's certainly possible.

I used the script found on http://www.eeeuser.com/ to enable 'advanced mode' in such a way that you can easily switch between that and Asus' GUI very easily. works for me.

Ahh Ill have a look at that, seems iv hit a brick wall now. the Xandros the eeepc runs has been customised by asus alot. I can get most of the development tools needed to compile megatunix but im having the old pkg-config-path problems i used to get with Mandrake Linux along time ago.

Seems GTK+-2.0 is a pain to get hold of the development library. iv been on the eee pc wiki etc and added the repository for the development tools got most of them. installed bison etc but were down to the last few required packages and its just going round in a circle one depends on the other to install.

It seems the debian development repository files from the eee wiki site dont like mixing with the asus ones.

I will change this guide to installing megatunix onto a USB UBUNTU LINUX PEN DRIVE. iv got the eee running megatunix on that. compiled straight away no bother at all. Proper linux distrobution lol

Then i will tackle the asus cut and shut xandros installation at a later date

[Dave W]

Change of subject here...

When I first fitted my engine I set it up using an LC-1 and have been running it quite happily since then with maybe the odd tweak every now and then. Now it's got a few thousand miles on it I've been thinking about a rolling road session to make sure I'm getting the most out of the engine and maybe improve the fuel economy at cruise.

A friend of mine works for his family firm who install LPG systems and they have a 4wd rolling road that they use to set those systems up. He has said I can hire the rolling road for a very good price per hour but I'm not sure that I'd know where to start anyway... would I be able to get anything useful out of a session with me having never used a rolling road before or would I be better off finding a rolling road that have MS experience and pay the extra ?

i kind of like the idea of having a go myself, if only because I've squirted a few vehicles now and being able to stick them on a rolling road would be useful. OTOH not having a clue what the rolling road can do and what I need to do to get the best out of the engine. I'm pretty sure that I've got the tune something like as it's not using horrendous amounts of fuel (relatively speaking !) and seems to have plenty of power, but then I've never driven a 410HP Defender before so for all I know it might only be running at 300HP or something which would, obviously, still feel fast compared to a RV8 anyway.

If the answer is to go to an MS aware rolling road, anyone know of one in/around Yorkshire that I can go to ?

The other problem I have is tyres... assuming the rolling road uses friction rollers, I'm guessing the Simex are probably not brilliant for this task. I have a set of Greenway Macho 235/85 that I use for trialling I could use but would I be better borrowing a set of road biassed tyres ?