Antnicuk
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| posted on 20/6/11 at 08:53 PM |
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How do you secure your speedo sensor magnets ???
Since building the car i have been through 8 speedo sensor magnets. I have tried chemical metal to secure them to the prop shaft, and araldite but
still they keep disappearing! I am considering welding them on next! any one got any suggestions? can i buy grub screw type ones that i can tap a
hole in and screw it in?
600 BHP per ton, Stylus Brought back from the dead! Turbo Rotary Powered!
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Ben_Copeland
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| posted on 20/6/11 at 08:56 PM |
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Araldite work for me. Make sure the surface is clean and de rusted. Blob of glue first, set magnet in. Another blob on top and levelled off. Never
lost any, apart from when the sensor dropped and knocked a few off !!
Some people have drilled a hole and glued them into that.
Ben
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gingerprince
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| posted on 20/6/11 at 09:01 PM |
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I've lost a couple myself, epoxied on. Rang ETB to get some more and asked what they recommend. Suggested chemical metal, and a turn of gaffer
over the top.
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daniel mason
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| posted on 20/6/11 at 09:06 PM |
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i am using a speed sensor which detects the bolt heads on the prop this time instead of a magnetic one! plus there is 6 per rotation and not just 1 so
caliberation should be closer
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bigfoot4616
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| posted on 20/6/11 at 09:08 PM |
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i use araldite and i don't think i lost any last year. so far this year i've lost one at rockingham and one at croft last week. the croft
one barely managed 5 laps.
mine are slightly recessed into holes and i got some fresh araldite to see if thats any better. not sure if it has a shelf life but my old stuff has
been in the garage for a lot of years.
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myke pocock
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| posted on 20/6/11 at 09:19 PM |
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Anyone ever tried VHB tape (very high bond) ? They use it in sign making etc.
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watsonpj
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| posted on 20/6/11 at 09:20 PM |
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I drilled holes the right size in the prop flange and araldited them in then tape over the top with a coating of araldite for good measure. They are
not going anywhere
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Antnicuk
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| posted on 20/6/11 at 09:21 PM |
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i have just looked on the koso dealer website and they have m6 and m8 bolts so i have ordered a pair of them. I will try fitting them somehow. I
tried putting the magnets in the yoke of the spline that goes into the gearbox and fitted the sensor to the end of the box, that way they should never
move any closer together (problem with a live axle). I find i have to put the sensor so close to the magnet to pick up a signal that they get knocked
off. I am hoping that the bolts, being bigger will have a stronger signal. Also the magnet seems to be in the centre of the bolt head so i maybe
able to weld it on without effecting the magnetism. I also dont fancy drilling a hole in the yoke.
600 BHP per ton, Stylus Brought back from the dead! Turbo Rotary Powered!
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whitestu
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| posted on 21/6/11 at 06:42 AM |
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I tried with epoxy and it came off.
The locost solution that worked was epoxy and a cable tie.
The cable tie and the magnet were glued on, with the head of the tie on the opposite side of the prop to the magnet under the assumption that it will
help keep it in balance a bit.
Been on for several years now with no problems.
Stu
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indykid
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| posted on 21/6/11 at 08:13 AM |
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Mine are epoxied on, then a layer of speed tape/foil tape over the top. I initially had 4 with just epoxy and lost 2 in the first week.
The other 2 are still there 5 years later
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DaveFJ
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| posted on 21/6/11 at 11:04 AM |
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mine are epoxied on using araldite standard as it is generally better than the rapid in my experience.....
I was absolutely scrupulous about preperation and roughed up the surface with wire wool then cleaned very carefully with MEK solvent (acetone based
nail varnish remover is pretty mush the same stuff). Used quite a lot of glue so it actually covered the magnet in a little coccoon - not just on the
base.
now been on for 3000 + miles with no issues at all.....
Dave
"In Support of Help the Heroes" - Always
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lotusmadandy
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| posted on 21/6/11 at 12:33 PM |
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Mine is fitted on the n/s rear drive flange.
I drilled and then tapped the hole to m6,then screwed the
supplied bolt with a magnet fitted in the head,into the hole.
Three years down the line and it's never been touched.
Andy
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bigfoot4616
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| posted on 22/6/11 at 07:02 PM |
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quote:
Originally posted by Antnicuk
that way they should never move any closer together (problem with a live axle).
to stop that happening on my live axle the sensor is fitted to a bracket welded to the diff housing. the magnets are fixed to the diff flange
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