JASAPP

Do you have a Puma that is a project? Do you want to track the progress with your own thread? Feel free to do it here.

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tuonokid
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JASAPP

Post by tuonokid » Sun Nov 25, 2018 8:17 pm

Just had a thought, does the new box have a fixed shaft at the back of the engine as that would be a good place to mount a trigger as there is only rotary movement on that.
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2001 ColOrado red Puma 1.7, work in progress.
Westfield SEIW 1800 Zetec.
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Wild E. Coyote
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Post by Wild E. Coyote » Sun Nov 25, 2018 8:39 pm

tuonokid wrote:
Sun Nov 25, 2018 8:06 pm
Hi Sinisa
The trigger wheels I've seen are usually quite light duty so to weld those to the flange of the driveshaft would be quite difficult but i'm sure you could epoxy them on but is there room on the inner flange because the flange is quite recessed down into the gearbox and there are strengthening webs around there (from memory)
That is actually not a bad idea! Glueing it in place. There is enough space, I checked. The only problem would be scaling down the signal as it would be 4-5 times bigger frequency, than needed. Ok, that is one option. Still think the best option is using the rear hubs, but alternative solution is always a bonus.

I might open up a gearbox and check if there is enough space on differential to take the tone ring from MTX75, but am very reluctant to the idea of drilling the housing so woud rather mount the sensor from outside...
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XAF
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Post by XAF » Sun Nov 25, 2018 9:44 pm

Sinisa, you have blown my mind again!! How do you even know where to start with this stuff?!!

I’m in awe, and can’t wait to see the result!
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Wild E. Coyote
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Post by Wild E. Coyote » Mon Nov 26, 2018 5:25 am

https://www.youtube.com/watch?v=8bQzkdK2ha0

1:40...
A bit from here, a bit from there.... :wink:

All is there on the net, you just have to search and study :!:
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Wild E. Coyote
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Post by Wild E. Coyote » Sun Dec 09, 2018 8:52 pm

So, a smallish update. I am sorry that progress is very slow, but I am just so busy lately and by the time I get home it is pitch dark and cold and since I have no heating in my mancave the things are not progressing as I would like them to!

So I am now focusing mainly on research and planning...

Anyway, this is the setup I am going to use (hopefully) as my VSS replacement.

Image

Image

This is the camshaft position sensor from a Hyundai i30/i20. Nothing fancy about it, just happened to have access to the connector and pigtail for it, hence the choice. When you come down to it, all are the same, i.e. do the same thing. As said, all the sensors are doing the same thing, the only differences among them is the packaging. There are som other candidates if this one turns out to be unsuitable.This one is Hall type, what is denoted by 3 wires.

Image

One wire is +, the other is ground and the third one is signal. It works both on 12V (as intended in Hyundai, most probably to be more resilient to distortions) and 5V. When sensor is in proximity of a ferrous metal it opens up the signal and sends the puls of 12V or 5V (depending on what is connected to).

There are two wire sensors which are VR (inductive) and they produce sinusoidal voltage that needs processing to be turned into voltage peaks needed by PCM, instrument cluster and PS pump. They need certain speed of rotation for the rings to be of use. The same type is used in ABS in puma and as you know it doesn't work below 5-6 kph. Hence I opted for Hall type.

I will have this tone ring laser cut from 4.5 - 5 mm thick steel plate (not stainless, it has to be magnetic)

Image

It has 9 teeth as that is what my instrument cluster needs per wheel revolution to operate. The Toyota PS pump needs 4.5 pulses per wheel revolution so that signal would need scaling down by 50%. The idea is to have it installed to the rear hub. Might make additional 3 holes for attaching it to the hub by 3 bolts to secure it properly. There will some be needed some bracket for the sensor, but will cross that bridge when come to it.

The other option would be to use another ABS sensor at rear already existing tone rings (you can just make another opening for it on the other side of the hub) but that one has 44 teeth so would need some serious scaling down (dividing by factor of 4.89 for IC and by 9.78 for PS pump) and, as already explanined, wouldn't operate below 5-6 kph, but no need for machining the hub, fabricating the bracket etc...

So that's it for the moment. When there is some development, will post it
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