MS1/EDIS to Speeduino
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Re: MS1/EDIS to Speeduino
Totally fine with a good thread hijack
I've previously used a relay coil to drive the tach. I'd highly recommend removing the switching bits of the relay as I didn't and the noise from it was quite audible over my engine!
I've previously used a relay coil to drive the tach. I'd highly recommend removing the switching bits of the relay as I didn't and the noise from it was quite audible over my engine!
Re: MS1/EDIS to Speeduino
It would be possible to build a circuit to give a larger pulse if needed. It is after all how the coil makes the pulse.
Dave
London SW
Rover SD1 VDP EFI
MegaSquirt2 V3
EDIS8
Tech Edge 2Y
London SW
Rover SD1 VDP EFI
MegaSquirt2 V3
EDIS8
Tech Edge 2Y
Re: MS1/EDIS to Speeduino
I'd be surprised if the relay could be heared over my engine but I'm with you on that. In fact I already have a relay butchered, er I mean modified, in this way.scudderfish wrote: ↑Sat Jul 10, 2021 7:52 amTotally fine with a good thread hijack
I've previously used a relay coil to drive the tach. I'd highly recommend removing the switching bits of the relay as I didn't and the noise from it was quite audible over my engine!
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Re: MS1/EDIS to Speeduino
It's alive! It starts and runs for about 10 seconds before dying, but fundamentally it works
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Re: MS1/EDIS to Speeduino
I've had it idling now. I had to fiddle a bit with the req fuel figure to get it ball park right. I had to stop it when the fan didn't kick in at the right time and it was heading towards overheating. I suspect I have air in the cooling system to bleed out as well.
Re: MS1/EDIS to Speeduino
If you need to alter the req_fuel by much at idle, chances are your dead time is out. Assuming you've calculated reg_fuel correctly, taking into account your fuel pressure.scudderfish wrote: ↑Sat Jul 31, 2021 3:57 pmI've had it idling now. I had to fiddle a bit with the req fuel figure to get it ball park right. I had to stop it when the fan didn't kick in at the right time and it was heading towards overheating. I suspect I have air in the cooling system to bleed out as well.
Dave
London SW
Rover SD1 VDP EFI
MegaSquirt2 V3
EDIS8
Tech Edge 2Y
London SW
Rover SD1 VDP EFI
MegaSquirt2 V3
EDIS8
Tech Edge 2Y
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- Site Admin
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Re: MS1/EDIS to Speeduino
My engine is a complete bitsa, running a 4 barrel TBI with 4 injectors of unknown origin and unknown flow rate I took the req_fuel figure from my MS1 tune as a starting point and then examined the logs. It was running until ASE dropped out (and lambda went lean) so I bumped up req_fuel until the injector time without ASE was at least what it was before with ASE to make it happier.DaveEFI wrote: ↑Sat Jul 31, 2021 5:06 pmIf you need to alter the req_fuel by much at idle, chances are your dead time is out. Assuming you've calculated reg_fuel correctly, taking into account your fuel pressure.scudderfish wrote: ↑Sat Jul 31, 2021 3:57 pmI've had it idling now. I had to fiddle a bit with the req fuel figure to get it ball park right. I had to stop it when the fan didn't kick in at the right time and it was heading towards overheating. I suspect I have air in the cooling system to bleed out as well.
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Re: MS1/EDIS to Speeduino
My next battle is my crank sensor mount. I've gone from a VR sensor to a hall-effect one. I bodged it into the mount I had previously made, but it was offset towards the rad by about 6mm and didn't really line up well. The engine runs, but I have a lot of dropouts to 0 rpm so I'm making a better one from scratch with more adjustability.
Re: MS1/EDIS to Speeduino
scudderfish wrote: ↑Mon Aug 02, 2021 4:36 pmI'm making a better one from scratch with more adjustability.
If you have any scratch spare could I have some? I make a lot of things from scratch and I'm running short.
Keep the updates coming always interesting to read about this stuff.
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Re: MS1/EDIS to Speeduino
You need to get a better cat. Endless supply of scratch if you need it. My cat is actually quite timid and gentle so I thought I'd better use steel instead. This is a mock up of what I'm planning to hang off the oil pump. Dimensions are all made up, I was just getting fed up of playing 3D Tetris in my head trying to figure it out. Flap disc in my grinder should make the welds look better when I make it.GDCobra wrote: ↑Mon Aug 02, 2021 5:43 pmscudderfish wrote: ↑Mon Aug 02, 2021 4:36 pmI'm making a better one from scratch with more adjustability.
If you have any scratch spare could I have some? I make a lot of things from scratch and I'm running short.
Keep the updates coming always interesting to read about this stuff.
Re: MS1/EDIS to Speeduino
Are you getting 'sync resets'?scudderfish wrote: ↑Mon Aug 02, 2021 4:36 pmMy next battle is my crank sensor mount. I've gone from a VR sensor to a hall-effect one. I bodged it into the mount I had previously made, but it was offset towards the rad by about 6mm and didn't really line up well. The engine runs, but I have a lot of dropouts to 0 rpm so I'm making a better one from scratch with more adjustability.
This is often caused by poor earthing strategy.
I had this and I followed an online 'expert's' earthing diagram. I re-wired to follow the official MSextra earthing wiring diagram and no more sync resets.
I also changed from firing the coils directly from MS - to an external Bosch coil driver and this helped reduce noise.
Dax Rush 4.6 supercharged V8 MSII
Re: MS1/EDIS to Speeduino
You likely know, but Trigger Wheels do a sensor mounting bracket for the RV8. But may not be suitable depending on engine accessories like power steering pump etc position. But I'd stick with a VR sensor. Since they don't have electronics inside them, they tend to be more reliable than a hall sensor. But do require a dedicated circuit in your ECU for VR.scudderfish wrote: ↑Mon Aug 02, 2021 4:36 pmMy next battle is my crank sensor mount. I've gone from a VR sensor to a hall-effect one. I bodged it into the mount I had previously made, but it was offset towards the rad by about 6mm and didn't really line up well. The engine runs, but I have a lot of dropouts to 0 rpm so I'm making a better one from scratch with more adjustability.
Dave
London SW
Rover SD1 VDP EFI
MegaSquirt2 V3
EDIS8
Tech Edge 2Y
London SW
Rover SD1 VDP EFI
MegaSquirt2 V3
EDIS8
Tech Edge 2Y
Re: MS1/EDIS to Speeduino
I'd stick to the same ground point on the engine that Lucas use.SuperV8 wrote: ↑Tue Aug 03, 2021 7:38 amAre you getting 'sync resets'?scudderfish wrote: ↑Mon Aug 02, 2021 4:36 pmMy next battle is my crank sensor mount. I've gone from a VR sensor to a hall-effect one. I bodged it into the mount I had previously made, but it was offset towards the rad by about 6mm and didn't really line up well. The engine runs, but I have a lot of dropouts to 0 rpm so I'm making a better one from scratch with more adjustability.
This is often caused by poor earthing strategy.
I had this and I followed an online 'expert's' earthing diagram. I re-wired to follow the official MSextra earthing wiring diagram and no more sync resets.
I also changed from firing the coils directly from MS - to an external Bosch coil driver and this helped reduce noise.
The check as regards grounding is no sensor should have a ground with the ECU unplugged. Use a decent twin screened cable for the VR sensor, screen only connected at the ECU end. Keep it as clear of HT leads as possible, and make any HT leads that must cross it do so at right angles.
Dave
London SW
Rover SD1 VDP EFI
MegaSquirt2 V3
EDIS8
Tech Edge 2Y
London SW
Rover SD1 VDP EFI
MegaSquirt2 V3
EDIS8
Tech Edge 2Y
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Re: MS1/EDIS to Speeduino
I should have really updated this. The problem was I had mounted a second processor (ESP8266) to act as a serial to wifi bridge. The emanations from this was doing silly things to the crank signal. Ripped it out and the engine runs with no drop outs. Self inflicted geek wound.