David Jenkins
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| posted on 27/11/06 at 11:30 AM |
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Toothed wheel trigger point
I'm in the process of fitting my toothed wheel, but there's one thing I'm not sure about - which bit of the wheel should be 90 degrees
BTDC?
In the attached picture below, "A" is the dead centre of the missing tooth, "B" is where the leading edge of that tooth would have
been, and "C" is the leading edge of the next tooth.
Which point should I aim the VR sensor at when the engine is at 90 degrees BTDC? (I think it's "A", but it's nice to get it right
from the very start).
cheers,
David
 
Rescued attachment dscf0023.jpg
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scottc
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| posted on 27/11/06 at 11:53 AM |
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I would guess at point 'A' as that is where the tooth is missing from.
But its only a guess so another useless comment from me 
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whitestu
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| posted on 27/11/06 at 12:06 PM |
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This might help [from MS website]
 
Description
[Edited on 27/11/06 by whitestu]
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paulf
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| posted on 27/11/06 at 12:40 PM |
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Point A , the centre of the missing tooth is correct.
Paul
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David Jenkins
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| posted on 27/11/06 at 12:41 PM |
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Excellent! Point "A" it is then (presuming that MS works the same as MJ - no reason why it shouldn't)
I panicked a bit when I saw "5 teeth ahead of sensor" but then I saw "EDIS-8" - phew!
David
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paulf
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| posted on 27/11/06 at 12:45 PM |
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Set it 9 teeth past the sensor when the engine is at tdc, if the sensor is at 9 0clock the gap will be at 12 oclock when the engine is on tdc. I had
to think about it when I did mine , it is a simple concept but seems to confuse many people and the more you think the more confusing it becomes.
Paul.
quote:
Originally posted by David Jenkins
Excellent! Point "A" it is then (presuming that MS works the same as MJ - no reason why it shouldn't)
I panicked a bit when I saw "5 teeth ahead of sensor" but then I saw "EDIS-8" - phew!
David
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Peteff
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| posted on 27/11/06 at 01:36 PM |
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Does the nine teeth include the one that should be where the gap is? If the sensor is at 0900 and the gap is at 1200 then the gap is 270* before TDC
isn't it? Sorry if I'm being obtuse but I'm trying to get my head round this as I've got a 1.8 zetec sitting in the shed which
I am fitting eventually
yours, Pete
I went into the RSPCA office the other day. It was so small you could hardly swing a cat in there.
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paulf
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| posted on 27/11/06 at 02:40 PM |
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Dont fully understand how you mean, but if fitting a zetec then you dont need to worry as the flywheel has the trigger point built in , unless you
intend using a CVH flywheel in which case you will need to fit a trigger wheel.
Paul.
quote:
Originally posted by Peteff
Does the nine teeth include the one that should be where the gap is? If the sensor is at 0900 and the gap is at 1200 then the gap is 270* before TDC
isn't it? Sorry if I'm being obtuse but I'm trying to get my head round this as I've got a 1.8 zetec sitting in the shed which
I am fitting eventually
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David Jenkins
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| posted on 27/11/06 at 03:22 PM |
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I cheated - after painting my pulley I made a mark with correcting fluid exactly 90 degrees prior to the TDC mark. If I put that on the block's
timing mark then the missed tooth should be right under the sensor.
I hope that's correct!
David
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Rob Lane
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| posted on 27/11/06 at 05:24 PM |
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David,
It's worth downloading the msns extra manual in pdf. There's full details of the tooth setup in it along with diagrams.
The 9 tooth setting is correct.
Tried to upload it to photos area but can't. So it's on my site here :-
MSnSEXtra Manual
Rob
[Edited on 27/11/06 by Rob Lane]
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Rob Lane
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| posted on 27/11/06 at 05:41 PM |
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Forget that, it's now out of date.
See here for better description.
MSnsExtra Manual
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David Jenkins
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| posted on 27/11/06 at 06:28 PM |
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Thanks to everyone for your info - I've been making up the bits & pieces required for the VR sensor and, at the moment, it seems to be
coming together well. Once Namrick supplies the slightly-longer bolts I require then I'll know whether my design works!
Fixing this sensor is the hardest part - everything else is wiring & brackets (he says, radiating over-confidence). I can work towards fitting
the rest of it while still playing with the car, until it's "cut-over time".
One question - my VR sensor's cable is too short - any ideas on how to extend it without compromising the screening? (I'll get the cable
from the bloke who sold me the trigger wheel).
cheers,
David
BTW: Looking at that MS manual made me realise that I'm just not ready for that yet!
[Edited on 27/11/06 by David Jenkins]
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paulf
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| posted on 29/11/06 at 10:15 PM |
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It is possible to get the plug with pins and a rubber boot from Premier and some other wiring suppliers. I extended mine using RS232 network cable and
just soldered and heatshrinked it originally.
I have since managed to remove them from Fiestas in the scrapyard with enough cable attached to allow installation without extending them .Fiestas are
good as many have the senor wire running around the front of the engine and along the front crossmember to the edis on the wing.It is easy to get at
and not to tied into the other loom as on some of the other cars.
The plug is a junior power timer type.
Paul.
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Agriv8
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| posted on 5/12/06 at 09:41 AM |
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going on a scrap yard raiding session this aternoon for the trigger sensor ( the trigger wheel is alraedy bolted to my crank pully - done on the last
engine swap ). looks like a fiesta is the favorite due to the length of the connecting wire.
To save me getting to wet trough seracing what fiesta and approx age are likley candidates for me ripping the required bit off.
Ps dont need edis unit as my coils are driven directly from my VEMS unit
many thanks
Agriv8
Taller than your average Guy !
Management is like a tree of monkeys. - Those at the top look down and see a tree full of smiling faces. BUT Those at the bottom look up and see a
tree full of a*seholes .............
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paulf
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| posted on 5/12/06 at 03:26 PM |
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Any early 90s fiesta with the valencia engine will have one , it is mounted at the front of the engine with a single torx screw.
Paul.
quote:
Originally posted by Agriv8
To save me getting to wet trough seracing what fiesta and approx age are likley candidates for me ripping the required bit off.
Ps dont need edis unit as my coils are driven directly from my VEMS unit
many thanks
Agriv8
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Agriv8
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| posted on 5/12/06 at 08:41 PM |
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thanks paul.
didnt get away today bloomin computers at work playing up 
Valencia engine not com across them ( moved onto VW's as I grew out of fords litterally )
thanks Again
Agriv8
Taller than your average Guy !
Management is like a tree of monkeys. - Those at the top look down and see a tree full of smiling faces. BUT Those at the bottom look up and see a
tree full of a*seholes .............
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