Benzine
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| posted on 25/11/08 at 10:15 AM |
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Megasquirt with flywheel VR sensor
I've got my engine out of the car at the moment. I'm using a tigger wheel on the crank pulley at the moment for EDIS but can I use the
original flywheel & sensor? (volvo)
It's got 58-2 timing marks. The missing teeth are about 90 degrees before the sensor (at TDC for cylinder 1) and MS wants, for a 6 cylinder:
EDIS-6: missing tooth is exactly six teeth (60°) ahead of the VR sensor.
I can't do this with the flywheel as there is a dowel meaning there is only one position to put the flywheel on. Can I use it as it is and then
adjust settings in MS to suit? Would be neater/more reliable than a trigger wheel/sensor on the crank pulley (although I do have that as a backup if
the flywheel sensor isn't an option)
MS2 V3 & megatune V2.25 btw
Thanks!
[Edited on 25/11/08 by Benzine]
The mental gymnastics a landlord will employ to justify immoral actions is clinically fascinating. Just because something is legal doesn't make
it moral.
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matt_claydon
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| posted on 25/11/08 at 10:17 AM |
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Not if you're using EDIS - it only works with 36-1. If you ditch the EDIS you can do what you like and set up the megasquirt accordingly.
As an aside, it'll almost certainly be 60-2 on the flywheel, not 58.
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Benzine
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| posted on 25/11/08 at 10:19 AM |
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quote:
Originally posted by matt_claydon
As an aside, it'll almost certainly be 60-2 on the flywheel, not 58.
I've recounted three times, still 58  Unless you count the missing teeth also? There are 58 teeth and a gap where two could fit
Can I not use these settings?
[Edited on 25/11/08 by Benzine]
The mental gymnastics a landlord will employ to justify immoral actions is clinically fascinating. Just because something is legal doesn't make
it moral.
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matt_claydon
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| posted on 25/11/08 at 11:35 AM |
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Yep, you count how it's written (60 minus 2, 36 minus 1) so you include the missing teeth in the main number (i.e. a 36-1 wheel has 35 teeth and
one gap).
You can't use those settings unless you're doing the trigger decoding within MS and using VB921 coil drivers or similar (i.e. not using
EDIS). EDIS has internal programming to decode a 36-1 wheel with a specific trigger angle (60 deg for EDIS6) only.
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Benzine
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| posted on 25/11/08 at 12:09 PM |
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Thanks for clearing that up, Matt! Now to get the engine back in the car! 
The mental gymnastics a landlord will employ to justify immoral actions is clinically fascinating. Just because something is legal doesn't make
it moral.
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matt_claydon
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| posted on 25/11/08 at 01:11 PM |
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Good luck
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02GF74
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| posted on 25/11/08 at 06:56 PM |
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quote:
Originally posted by matt_claydon
EDIS has internal programming to decode a 36-1 wheel with a specific trigger angle (60 deg for EDIS6) only.
Useful to know. That will thwart your efforts to use the flywheel. You could drill holes in the wheel (36-1) whcih ofcourse will introduc imbalance
unless you balance it after - cheaper to fit trigger wheel - or fit a speedo healer type unit to convert pulse frequency - the latter being easier
said than done. I would suspect the pulse rate must be even so there is an added compllication for the healer; speedos shouldn;t care about that.
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