fha772
|
| posted on 6/1/14 at 09:43 PM |
|
|
Trigger wheel thickness?
Hi all,
I'm just sorting out the size of my trigger wheel for my Mercedes EFI conversion.
I was wondering how thick the wheel needs to be?
I'm assuming 3mm+, does that sound about right to you guys?
Cheers Frank.
http://www.ppcmag.co.uk/forum/viewtopic.php?f=47&t=6743&start=105
|
|
|
|
|
matt_gsxr
|
| posted on 6/1/14 at 10:24 PM |
|
|
3mm will probably work but a bit thicker isn't a bad idea to ensure you get the best sensitivity.
Trigger wheels ones are ~5mm.
It depends on the size of your sensor too (big sensor == wider wheel).
You can't have too reliable trigger detection.
|
|
|
baz-R
|
| posted on 6/1/14 at 10:44 PM |
|
|
the actual answer would be dependent on sensor and air gap
most use vr type sensors that are simply a rod shape magnet (sometimes pointed) with a thin copper wrapped around it, the wheel tooth changes the
magnetic flux and induces a ac voltage as thay pass
the ecu then just counts the pulces and a missing tooth adds a sync point
a rule of thumb was the tooth needs to be steel and be at least the width of the rod magnet
air gap should be kept to a little as possible around .75mm
|
|
|
Irony
|
| posted on 7/1/14 at 09:15 AM |
|
|
My trigger wheel is 4 or 5mm. It's a pretty heavy duty bit of kit. Its from Trigger Wheels. If someone chucked it at you head it would
seriously hurt!
|
|
|
mcerd1
|
| posted on 7/1/14 at 09:43 AM |
|
|
Mines from Trigger-Wheels - its 5mm thick
(according to the drawing I did at the time to work out how to mount it - i left a 4mm spgot and it sits just proud of that)
http://i5.photobucket.com/albums/y170/mcerd1/Dax/Pulley-V3-1.gif
http://i5.photobucket.com/albums/y170/mcerd1/Dax/IMG_4565-1.jpg
[Edited on 7/1/2014 by mcerd1]
[Edited on 7/1/2014 by mcerd1]
-
|
|
|
coyoteboy
|
| posted on 7/1/14 at 10:23 AM |
|
|
Mine's 5mm, again from Trigger Wheels and using a ford sensor with 0.25mm airgap, mounted on a sexy little adapter made by my father! Currently
having misfire issues though and not sure of the cause but the scope shows a beautiful clean signal from the sensor.
 
Description
[Edited on 7/1/14 by coyoteboy]
|
|
|
fha772
|
| posted on 7/1/14 at 01:52 PM |
|
|
Thanks guys, I think I'll go for 5-6mm plate, I've got plenty of that kicking about.
Cheers Frank.
http://www.ppcmag.co.uk/forum/viewtopic.php?f=47&t=6743&start=105
|
|
|
