Audi quattro 6 sp impreza conversion
#122
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#123
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I am still working on this, I have made a new speed sensor ring from plastic with five counterbores to accept magnets.
Still waiting on magnets from eBay, once they are pressed and glued in I can re assemble and re full the gearbox, then that's the car back on the road for a good shakedown
Still waiting on magnets from eBay, once they are pressed and glued in I can re assemble and re full the gearbox, then that's the car back on the road for a good shakedown
#126
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#128
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I'm pretty sure it will be fine, as I said the magnets will be pressed in with glue, not just glued
#130
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With heat expansion of the plastic & glue bond I personally wouldn't trust it. If possible I'd see if you can drop the magnets in from the inside of the ring so that there is a solid plastic edge stopping them coming out. Also, you may not need them visable as they will obviously work through the plastic.
That will depend on the measuring range of the sensor and the mounting gap from the target.
That will depend on the measuring range of the sensor and the mounting gap from the target.
#131
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With heat expansion of the plastic & glue bond I personally wouldn't trust it. If possible I'd see if you can drop the magnets in from the inside of the ring so that there is a solid plastic edge stopping them coming out. Also, you may not need them visable as they will obviously work through the plastic.
That will depend on the measuring range of the sensor and the mounting gap from the target.
That will depend on the measuring range of the sensor and the mounting gap from the target.
#136
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Clutch was in stock
Made the flywheel at work
Rear diff £110
Prop £90
Gear shift remote £25
Cv joint, welding supplies, brake fluid, paint gear oil and other bobbins £100?
So £575 plus lots of time.
If I sell my mintastic five speed with rear diff and near new uprated clutch for £400 then it's only cost £175 plus my time.
#137
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Rare earth moly what's it's I've bought, hellish strong magnets. Alu is .5mm thick. I'll test the attraction with a bit of mig wire. The reed switch doesn't need much
#138
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I would estimate that the magnet may lose up to 3/4 of it's strength & range if an aluminium cover is put between it and the target.
We have some rare earth magnets here at work and aluminium sheet and I have just tried this.
We have some rare earth magnets here at work and aluminium sheet and I have just tried this.
Last edited by BrownPantsRacing; 21 October 2014 at 03:53 PM.
#139
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Cool, the audi ring was not very magnetic at all, so hopefully my combination of rare earth magnet and thin aluminium will be just about right. We will see as soon as Royal Mail eventually turn up, hopefully tomorow.
Away to go and mess with magnets myself now!
Away to go and mess with magnets myself now!
#141
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Gearbag £250
Clutch was in stock
Made the flywheel at work
Rear diff £110
Prop £90
Gear shift remote £25
Cv joint, welding supplies, brake fluid, paint gear oil and other bobbins £100?
So £575 plus lots of time.
If I sell my mintastic five speed with rear diff and near new uprated clutch for £400 then it's only cost £175 plus my time.
Clutch was in stock
Made the flywheel at work
Rear diff £110
Prop £90
Gear shift remote £25
Cv joint, welding supplies, brake fluid, paint gear oil and other bobbins £100?
So £575 plus lots of time.
If I sell my mintastic five speed with rear diff and near new uprated clutch for £400 then it's only cost £175 plus my time.
sounds like if you have the capability to do it yourself then cheap upgrade option, i'd guess if paying someone then not, but fair play for doing it chap
#142
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Gearbag £250
Clutch was in stock
Made the flywheel at work
Rear diff £110
Prop £90
Gear shift remote £25
Cv joint, welding supplies, brake fluid, paint gear oil and other bobbins £100?
So £575 plus lots of time.
If I sell my mintastic five speed with rear diff and near new uprated clutch for £400 then it's only cost £175 plus my time.
Clutch was in stock
Made the flywheel at work
Rear diff £110
Prop £90
Gear shift remote £25
Cv joint, welding supplies, brake fluid, paint gear oil and other bobbins £100?
So £575 plus lots of time.
If I sell my mintastic five speed with rear diff and near new uprated clutch for £400 then it's only cost £175 plus my time.
#144
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#146
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#147
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Regarding the strength of the magnets...
You say the Audi magnets are not that strong and you've bought strong magnets. Might seem like a good idea, but what about the fact you're effectively enlarging the magnetic field between the magnets? I know how strong those magnets are, just thinking it might pick up wrong in regards to your calculations regarding speed?
Love the project though.
You say the Audi magnets are not that strong and you've bought strong magnets. Might seem like a good idea, but what about the fact you're effectively enlarging the magnetic field between the magnets? I know how strong those magnets are, just thinking it might pick up wrong in regards to your calculations regarding speed?
Love the project though.
#148
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Regarding the strength of the magnets...
You say the Audi magnets are not that strong and you've bought strong magnets. Might seem like a good idea, but what about the fact you're effectively enlarging the magnetic field between the magnets? I know how strong those magnets are, just thinking it might pick up wrong in regards to your calculations regarding speed?
Love the project though.
You say the Audi magnets are not that strong and you've bought strong magnets. Might seem like a good idea, but what about the fact you're effectively enlarging the magnetic field between the magnets? I know how strong those magnets are, just thinking it might pick up wrong in regards to your calculations regarding speed?
Love the project though.
But yes I suppose magnets that are too strong will just keep the reed switch closed all the time. I guess we will find out this week
#149
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That's right, nothing ventured nothing gained especially with a build that's outside the box, sometimes its trial and error just to find what works right for you.
#150
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Installed the ring, re assembled front diff casing, filled with oil.
Speedo works, but reads double. I think it will be ok once the cars in the ground as I'm sure the rear wheels aren't turning, hence the double speed through the differential. There's no driveshafts in the front just now, so driveshafts in, wheels in and she's good to go.
Working on the pitch stop just now too, making one from scratch to suit the audi box, this won't stop me running the car in te meantime though.
The fact the speedo works and reads high must suggest it's seeing every magnetic pulse, I was concerned it wouldn't pulse at all so must be working. Find out over the weekend I suppose
Speedo works, but reads double. I think it will be ok once the cars in the ground as I'm sure the rear wheels aren't turning, hence the double speed through the differential. There's no driveshafts in the front just now, so driveshafts in, wheels in and she's good to go.
Working on the pitch stop just now too, making one from scratch to suit the audi box, this won't stop me running the car in te meantime though.
The fact the speedo works and reads high must suggest it's seeing every magnetic pulse, I was concerned it wouldn't pulse at all so must be working. Find out over the weekend I suppose