I have to do a bit of sorting for the fuel supply, I will use the existing pump for now but the S54 throttle bodys dont have a fuel return so there is no regulator on the fuel rail. I am not sure what the advantage of having the fuel pressure reg so far away from the injectors is, if any (Its under the car by the fuel tank in the M3 S54)
Its the same connection as a fuel injector c clip and o ring, so I copied one and made it from brass so I could solder it some 8mm copper pipe.
Fuel reg and fittings.
I made an fitting to solder on for the rubber hose connection and soldered it on as well,bent it to suite my set up.
And added a tab.I dont want any fuel leaks.
I made this lad up as well, the Y fitting looked messy it on the heating return pipes to the bottom of the rad.
Its being a while since I updated and its being a while since I had any real time to spend on the car, I have started the wiring, I have placed in the original loom and picked out the wiring from the 20 pin connector in the engine bay that I will need to drive the oil light/tach/temp which I will re connect thru the E46 engine loom. I am not sure what I will do with the mpg gauge?
The megasquirt is closer to the car now. I have being playing with the throttle position sensor to find which pins are power/signal/ground and connecting to the MS3 amongst other sensor’s I have set up a test bed to iron out any issues rather that wondering whats wrong later, the megasquirt software is a fantastic tool “tuner studio” you can see live readings on gauges or voltage/resistance, its easy to tell if sensors are good or bad. you can set it up for just about any type of sensor and calibrate it to the sensor by correcting the off set. I have taken a few picture to show the tuner studio but the pictures dont do it justice.
This one is for the throttle position sensor, its at 50% shown on the dial (2nd to the left) turn the tps and watch the dial move, really handy to fault find a sensor.
This one is for the coolant, i heated it up with my solder iron. Its a really quick response.
Air temp sensor. all three are driven by a 5V supply got from the MS3.
Its onto the engine now and check for the crank position and cam position sensors.
Big step forward this evening. the m52 Siemens crank sensor wont work with megasquirt, its neither hall effect or VR. I got a M44 crank sensor which fits straight into the block, correct length and bolt location which aligns up the sensor with the teeth. Quick look at the M44 engine wiring and connect to the megasquirt. result. the trigger wheel in the m52 is 60-2 and the crank angle is 324 b tdc.
You can see the teeth (small lines) and the missing ones are the tall lines. Megasquirt counts the 60 and expects the time for the missing two, if its wrong you will get a line going the wrong direction and a tooth log error is recorded.If you look closely to the lhs of the lines you will see the tooth log times. they should be all pretty close for a good signal. mine are around 5.0XX m-seconds, looking good. I am not running yet, but pretty close.
Update time, I have being messing around now for a while with the megasquirt, getting all the sensors working and figuring out some of the 1000 settings, there are some good video’s on the uk web site, (http://www.extraefi.co.uk/video.html) to help out. I have finally started the engine loom and tidying it up a bit. up to now its being wiring all over the place and the std cam sensors work on the MS3.
I had to make this spark driver up. the ms3x wont drive the M52 BMW coils, well it will but not for long (so I am told) this is basically a set of 6 relays with a resistor to prevent too much current flowing.
From the back.
With a heat sink and plug, I have a scrap LS400 out back and its good for the plugs, Toyota ones are easy to take apart and there are lots of plugs for spare pins in the LS400.
Software for testing the plugs/coils etc. there is a few settings that have to be set, like time to charge the coils and how long to discharge, go too high in the settings and the spark unit will get hot. too hot to hold even.
Plug sparking, this is really handy, you can verify that each coil is working, one at a time.
Being busy on and off with the car, mainly wiring everything up and checking as I go using the MS tuner studio. The VVT solenoids caught me out for a while until I realised they are grounded thru the megasquirt and not powered thru the MS,
Anyhow I have a result.
Some MS settings, this is just a sample.
Main ignition page..
VVT page, MS3X supports 4 VVT’s.
VVT tables. ( I wont claim credit to these, I got the values of a lad in the USA who dyno his car (M54) a million times, I trust him).
I have her running and she is a bit rich, but I only started it last night around 9:30. lots of setting to mess with now.
Being busy sorting out the exhaust, I am running a std 325 rear section and Have made two pipes from the exhaust manifolds back to join up. I have given the center box a miss, did a quick trial rum to make sure it is not tool loud and its not. Weld is up. I got 6 45 Deg bends and a length of exhaust tube, (48 mm). I used two flex’y joints up near the engine and a shot of exhaust sealer, job done. It’s a pretty straight thru affair and the car revs pretty freely. I have the rpm limiter set to 5500 under 70C, I jumps from 950 rpm to 5500 rpm in about 1 second. I don’t have it tuned correct yet.
I have started sanding, the shell is pretty straight only a few dings here and there, It needed a bit of filler by the sun roof, most likely due to the sunroof frame removal/install.
The valance needed a few taps, she had a small prang in the past.
Getting ready to paint the car at this stage, I have being busy sanding it down and repairing all the little car park dings the car has gathered over the years. I have one last rust repair that I spotted when dissembling the door. The plate where the mirror attached is rotten through, no totally but the u shaped support is rotten through. I cut and drilled out a few spot welds. Shaped up a piece by flattening out the cut part and bent the new repair back to shape.
100% rot free, its a good day.
Painted some parts.
Door openings, Getting ready align up the body panels.