38 replies to this topic

[nicklouse]

Ok what else is there that you could use as a trigger that has a repetitive action and would be easy to measure.
 

 

fuel pump lobe. 

[Spider]

Ok what else is there that you could use as a trigger that has a repetitive action and would be easy to measure.
 

 

fuel pump lobe. 

 

That did also occur to me. The MPI Cam has a better shaped 'lobe' for a Cam Pick-up, but, also has no dissy drive gear, which I need to retain 'in case'.

[sonscar]

Some systems start wasted spark then sequential as they see the can sensor to give quicker starting(apparently)Steve..

[mini13]

I imagine a man of you calibre you could reshape a fuel pump lobe, trouble us what shape do you need. What ecu you going to be using?

With mine i belive it looks at a 50/50 window, so you only need to get it within 360 deg of the engine cycle for the ecu to work the rest out.

Another solution would be to drill a holding the block next to an appropriate cam lobe... But which one! ?

[Avtovaz]

that is i a point you know, if you if your buying a new camshaft for it, i wonder if you could get a special lobe ground onto it, and then use either the fuel pump mount, or the dizzy mount to point a sensor in.

[PoolGuy]

Moke, did you find a solution for this? I'm looking at the same thing and had considered a sensor in the timing cover.

Edited by PoolGuy, 30 April 2022 - 12:56 PM.

[Spider]

Mike, did you find a solution for this? I'm looking at the same thing and had considered a sensor in the timing cover.

 

I ended up making a 'distributor' with a No. 1 TDC Pick-up. It works and is effective, just more bulky than I'd like.

 

I'll likely come back to this at some future point.

[PoolGuy]

Thanks. That's not an option for me as the starter motor is in the way, it could be adjusted but as you say, the distributor option is a bit bulky. I found another thread on here where someone was trying the same thing, I'll see if he's still around.

 

(excuse the state of the engine, it's coming out soon)

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[sonscar]

A hall sensor in the rocker cover picking up on the rocker arm?Steve..

[Spider]

Thanks. That's not an option for me as the starter motor is in the way,

 

I was in a similar boat (though the Starter isn't quite as big) and had to make the shaft longer than I wanted to to clear it and that just added to the bulk of it.

 

 

A hall sensor in the rocker cover picking up on the rocker arm?Steve..

 

I think this will be the way I'll go, it ticks all the boxes for me, but I've a few other dragons to slay before I can get back to this.

[Java_Green]

Thanks. That's not an option for me as the starter motor is in the way,

I was in a similar boat (though the Starter isn't quite as big) and had to make the shaft longer than I wanted to to clear it and that just added to the bulk of it.

A hall sensor in the rocker cover picking up on the rocker arm?Steve..

I think this will be the way I'll go, it ticks all the boxes for me, but I've a few other dragons to slay before I can get back to this.

I would very much like to see what you made up, any pictures to share?

[Java_Green]

How is this solved on the MPIs? Pictures would help...

[Spider]

 

I was in a similar boat (though the Starter isn't quite as big) and had to make the shaft longer than I wanted to to clear it and that just added to the bulk of it.

I would very much like to see what you made up, any pictures to share?

 

 

I don't have many photos on this computer of it all, but this is the 'distributor' I made;-

 

 

 

How is this solved on the MPIs? Pictures would help...

 

The MPi's had 2 pick-ups, One was on the Cam, where the Fuel Pump Lobe normally is, so that the ECU 'knows' what part of the cycle the engine is on an the other was on the Flywheel to measure crank angle directly.

[cockney21]

as already said...I personally I would keep things simple and not bother with a cam sensor, Ford was happy running wasted spark in their cars for years, and unless you want to specifically run sequential injection there is no downside to the system. I had wasted spark and batched injection fitted to a car I built and it started, ran and passed MOT emission just as well as a engine running with a cam sensor. 

[Java_Green]

Thanks for the picture Spider. Neet, but a bit too bulky for my built. It still gives me ideas.

Cockney21, so far running fuel injection in batch mode has been my intension. However, doing so, makes it a bit more prone for knock. I might not have that margin...