Printable Version | Subscribe | Add to Favourites
New Topic New Poll New Reply
Author: Subject: Trigger wheel thickness?
fha772

posted on 6/1/14 at 09:43 PM Reply With Quote
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

View User's Profile View All Posts By User U2U Member
matt_gsxr

posted on 6/1/14 at 10:24 PM Reply With Quote
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.

View User's Profile Visit User's Homepage View All Posts By User U2U Member
baz-R

posted on 6/1/14 at 10:44 PM Reply With Quote
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

View User's Profile View All Posts By User U2U Member
Irony

posted on 7/1/14 at 09:15 AM Reply With Quote
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!
View User's Profile View All Posts By User U2U Member
mcerd1

posted on 7/1/14 at 09:43 AM Reply With Quote
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]





-

View User's Profile View All Posts By User U2U Member
coyoteboy

posted on 7/1/14 at 10:23 AM Reply With Quote
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
Description


[Edited on 7/1/14 by coyoteboy]






View User's Profile E-Mail User View All Posts By User U2U Member
fha772

posted on 7/1/14 at 01:52 PM Reply With Quote
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

View User's Profile View All Posts By User U2U Member

New Topic New Poll New Reply


go to top






Website design and SEO by Studio Montage

All content © 2001-16 LocostBuilders. Reproduction prohibited
Opinions expressed in public posts are those of the author and do not necessarily represent
the views of other users or any member of the LocostBuilders team.
Running XMB 1.8 Partagium [© 2002 XMB Group] on Apache under CentOS Linux
Founded, built and operated by ChrisW.