Interesting...my old w140 S500 had allso 4-web driveshaft flanges while friends 350TD w140 had 3web...that makes me think that SL500 should allso have 4web...but I hope you are right.
Anyway why are yu bothering with meqasquirt 12cyl cop ignition? I am no pro. on this subject but seems to me that meqa can only handle up to 8cyl cop or 16cyl wasted spark? IMo it would be easyer to use VEMS or smth like that...price is the same as meqa, put its sure that this ecu can handle`em...

regards,

Allar

I hope I'm right as well on the 3 web flanges. Because I can never figure out why they would ever do that, especially since I am aware of the early SL500 having 4 lobe flanges. But in the pictures in EPS there is a 3 web and 4 web. When you click on them you get 2 different part numbers. If you take the part numbers and do a search on them you get the transmissions they go to.

P/N A 220 272 06 45 is shown as the three lobe and it will fit a 722.620 or 722.624 transmission and a list of others which does not include the 621. The 620 and 624 are used on the SL500 depending on year.

P/N A 220 272 05 45 is shown as the four lobe and it will fit a 722.621 and other transmissions. The 621 is what came on my SL600.

The 722.620, .621 and .624 all use the P/N A 220 270 00 26 output shaft.

As far as using MegaSquirt over anything else. I would choose them based mostly on the support forums and the fact that they are currently developing a GPIO with Megashift addon which I will most probably need for my electronic transmission. Building and installing a Megasquirt is the best way I know to get to know how to do this. Once you get that going, you can swap it for anything you want. I belive at the moment the only way I can implement MS2 is with 2 units driving each side of the engine seperately. They are also working on a router that will allow for 12 cyl COP.

Im also looking into the possibility of using 1 MS2 with addon code to drive 2 Ford EDIS 6 cyl ignition units if it can be done.

The bottom line is MS is getting there and is a solution that I belive will be ready by the time I get it done.

John Roncallo

Hey John,
Yeah, That's what I was going to tell ya. MegaShift for the GPIO is coming out shortly. I have also seen code for non Mercedes ZF transmissions which should be very similar. This route is way better than trying to reverse engineer the Mercedes CAN protocol for the trans computer. Plus it will give you more flexibility in tuning. If your not already there, check out the Megasquirt forum, this is where all the Megasquirt designers hang out.

Assembling megasquirt is very straight forward. The instructions are very good. It took me two evenings to assemble based on my skill level. Here’s a tip for ya..... READ ALL THE INSTRUCTIONS BEFORE YOU BEGIN ASSEMBLING!!! This is important because you will need to make some decisions before you begin building. Stuff like, will you be using a hall effect or VR or ignition signal for triggering, what type of ignition output are you using and what type of IAC your using..... It is important to figure out all of this before you start building.

I’m not sure what your skill level is in soldering but I have been doing it since I was 10. The first key to good soldering is the Iron….. PLEASE, don’t buy a cheap Radio Trash one! Get one like this… http://cgi.ebay.com/Weller-EC2002M-Soldering-Station-with-Solder-Iron_W0QQitemZ150139445942QQihZ005QQcategoryZ57012QQrdZ1QQcmdZViewItem You will be very frustrated and your joints will look like **** with a $10 one. Also, If you buy used, get a new tip. Short with a fine point. Get the thinnest solider you can find, I use .031. There are some great articles on how to properly use a soldering iron on the internet. Read two of them and come to your own conclusions. Keep that tip clean! If you’ve never soldered before, you may want to buy a cheap electronic kit to practice with.

The time it’s going to take you to get it up and running after assembly is not an easy question to answer. Based on what I have read in your posts and the quality of your work, not long. As long as you have a good plan before you start, things will come together really fast. I would highly suggest you get the relay kit as it makes wiring cleaner and easier. I would also HIGHLY suggest you use the MAP sensor. According to one of your posts, your thinking of not using it. Don’t do it. Megasquirt was designed to use it. I know you have 2 separate manifolds to deal with so, just connect it to one. I would also highly suggest you go with two WB02 sensors. This will make sure each side is properly balanced. You don’t want to burn out half of your M120! Having an engine that was originally designed for EFI is a great start, You don’t have to worry about designing the whole fuel delivery system like me. Also, going with the mustang TB’s is a good idea. You’re going to need to figure out what to do for your IAC. I have no clue off the top of my head but I’m sure we can figure something out. We may be able to use an extra Ford stepper motor on your mustang TB’s using an additional stepper motor driver…. Just a thought.

Now, who to buy from. That’s easy… http://www.diyautotune.com These guys are the best! Great prices, quality components and excellent customer service. If you want I can generate a parts list for you to get started. Some stuff you may opt to not purchase but it will get you headed in the right direction. To start, I would get the MS2 kit and the stimulator kit. That will get you building. Also the DB-9 to USB is a worth while investment. Let me know if I missed anything or if you have any other questions. I can’t wait to see your project done!
Good Luck!
Adam

__________________
Current Stable:
01 ML55 AMG
92 500E (a few mods)
87 300E (lots of mods)
00 Chevy 3500HD Diesel Box Truck
68 18' Donzi Marine
06 GT i-Drive7 1.0 Mountain Bike (with GPS!)

PREVIOUSLY OWNED:83 300SD, 87 420SEL, 88 420SEL, 90 420SEL, 86 560SEL, 86 190E 2.3-16V AMG, 94 E320

At the moment the plan is as follows:

Use 1 MS2 unit with 2 Ford EDIS-2 controllers or equivolent.

I will loose the throttle by wire and use two 70mm Ford aftermarket replacements.

I will start by using a manifold absolute pressure MAP and manifold airflow MAF sensors, but would eventually like to eliminate the MAF sensors using wide band O2's. I dont know how I would ever get Megasquirt to run without MAP so that stays for the moment or maybe wide band is wider and faster than I thought.

Idel air control IAC can be done with any other idel air controler. I can use one or 2 controlers. Cylinders can be balance based on MAP and tweeking the throttle stops.

Still yet to be worked out.

1) Will MS2 drive 2 EDIS-6 units and 12 injectors. The alternate plane if it wont is to use 2 MS2 units

2) I need to find an aluminum 90° elbow with a 70 mm id that I can modify to mount the throttle bodies. I did fine a 4" unit for a Mastang Turbo charger inlet elbow, that too big. There should be some turbocharger system that uses a smaller aluminum one. Most turbos use a flexible inlet elbow which I cant use since I would be down stream of the throttle.

3) Will the Ford system drive the MB coils. From searching the web, I guess me finding that out is going to be my contrabution to MS. Otherwize it will be Ford coil pack and ugly wires.

From all of the above once I solve problem #2, I belive I have an exacutable plan. I will more than likely carry this out wether I get the stock MB unit to run or not.

So for me I belive my initial bill of materials will be something like this.

Mesgasquirt 2
Interagator
Megatune software
Relay board
GPIO card

2 Ford aftermarket throttle bodies
2 3" turbocharger inlet elbows.
2 Ford EDIS-6 modules
36 tooth wheel
2 hall effect pickups.

Then the work involved will be:

1) Weld the turbocharger elbows into manifolds that will support the throttle bodies.

2) Build a throttle linkage

3) Build a MS2 unit and install

4) All the rest of the plumbing and fabrication I need to do on this car to finish the install.

John Roncallo