MS3x Cam sensor signal on 4.6 Rover v8

[Davecrx]

Hi

I better start of with what I am currently running and what I hope to be running soon.
I have a 3.5l Rover V8 running on MS1 extra, Batch firing injectors and ford EDIS for the sprak from a 36-1 trigger wheel on the crank

What I want to be running soon is a 4.6l Rover V8 running on MS3x, sequential injectors and directly controlled spark from the oem wasted spark coil pack (either direct drive or logic via a Quadspark)

I will be keeping the 36-1 trigger wheel on the crank but from what I have been reading I will need a Cam position sensor to run sequential injection.
What I would to confirm (I may have got my wires crossed) is that the MS3x only needs to see one cam trigger event per crank revolution after the missing tooth on the crank trigger wheel, any other cam triggers are ignored.

This is the type on Cam gear that is used on the engine.

As you can see it has 3 large teeth and 1 small tooth. I would appear the first of the lager teeth is the first tooth after TDC.

Would this sort of cam gear be ok to use as a cam trigger or not?

Thanks Dave

[billr]

I think you are going to have to fill in three of those windows, get it down to just one "tooth". Yeah, you could cut out three of the spokes, but that would leave a pretty weak sprocket.

[Davecrx]

I think you are going to have to fill in three of those windows, get it down to just one "tooth". Yeah, you could cut out three of the spokes, but that would leave a pretty weak sprocket.

So I take it the cam input must only see one tooth in order for it to work properly.

I don't think that would be all that hard to do if I were to attach a steel plate to the cam gear with only one cut out in, the sensor would only see one space and one large tooth.

[DaveEFI]

You could try asking on theV8forum.co.uk. Lots of Rover V8s of all sorts on there and many with Megasquirt. Mine is a 3.5, so I use a modified dizzy to provide the cam signal.

[Peter Florance]

Funny, I was just looking at one of those. I'm assuming no decoder has been written for that pattern.

[jsmcortina]

Funny, I was just looking at one of those. I'm assuming no decoder has been written for that pattern.

I think that you can use "poll level" and pick the correct tooth to check and it will work.

James

[Peter Florance]

Funny, I was just looking at one of those. I'm assuming no decoder has been written for that pattern.

I think that you can use "poll level" and pick the correct tooth to check and it will work.

James

Cool, thanks James.

[DaveEFI]

As far as I know the last version of the RV8 injection after BMW bought Rover - called Thor, and was Motronic, had sequential injection but stuck with wasted spark. So would have had a cam sensor.
But I've not worked on one, so dunno how it was done.

[Davecrx]

As far as I know the last version of the RV8 injection after BMW bought Rover - called Thor, and was Motronic, had sequential injection but stuck with wasted spark. So would have had a cam sensor.
But I've not worked on one, so dunno how it was done.

You are correct but the engine produced just before the Thor engine had a Gems system which Didnt have a dizzy but did have a cam sensor.
I also believe it used the same wasted spark setup but I'm unsure if it used batch or sequential injection

[Peter Florance]

As far as I know the last version of the RV8 injection after BMW bought Rover - called Thor, and was Motronic, had sequential injection but stuck with wasted spark. So would have had a cam sensor.
But I've not worked on one, so dunno how it was done.

You are correct but the engine produced just before the Thor engine had a Gems system which Didnt have a dizzy but did have a cam sensor.
I also believe it used the same wasted spark setup but I'm unsure if it used batch or sequential injection

Was this the 4.0 L motor?