cam sync

[Seight-v8]

hello all,

Does anyone know if it would be possible to use this cam sprocket with the cam sync settings in the vems



This is the sprocket i have fitted on my v8 camshaft, the sensor is fitted in the front cover and ready wired in to vems.

I've tried already and engine wouldnt fire.

cheers

scott

[rob@vems.co.uk]

You are going to need to check that the small slot you have there is capable of detection with a Hall sensor - gonna need a scope for that sir.
Normally the RPM reading will sit at 100rpm if theres a crank but no sync signal.
What setting did you use?

[Seight-v8]

i tried the following settings in secondry trigger settings

mode - cam sync
edge - falling

active                 - enabled
edge will cranking - disabled
filtering               - disabled
type                   - coil type
subaru special      - disabled
use                    - cam sync
raw value            - 24

dont know what most of them mean, so dont know if any of them are wrong or not.

I have a 3 wire (hall) sensor mounted in the front cover...its wired but cant tell if it works or not.

cheers

scott

[rob@vems.co.uk]

With the Nissan triggers I used a raw value of 25.
Regardless of the setup you need to know if that hall sensor works - simple enough to do, power it up, and put a DVM between the signal and gnd.  Take a piece of steel and move it towards the sensor - at some point the signal voltage will change.
Then you would be best to crank the engine by hand and see if the hall sensor pick up that slot - which I'd be amazed if it did - you could machine that slot to make it work of course - can you get a datasheet for your sensor?

[dnb]

If it's the standard Range Rover sensor, then it'll give a good signal if you feed 5v to the sensor correctly...  It's been proven to work on lots of Range Rovers after all!

However, I am not sure how to get VEMS to interpret this particular signal.  It looked a little weird to me when I looked several years ago.  Hopefully things have moved on now because being able to use this wheel would make my camsync installation easier.

[Seight-v8]

thanks will test it tomorrow.

It was a brand new LR sensor last year, as it off a discovery v8 engine due to the front cover been deeper.

So it is designed to work with the sprocket in the picture...

Just hope it can work with the signal it produces...

Will ask a work...see if i can get a scope or something to see how it pulses.

scott

[mattias]

Those four slits in the sprocket will mean four pulses, there should be only one.

[dnb]

3 long and one short...  Hence why I didn't think VEMS would do this at the moment - it's a similar idea to the Impreza cam trigger and that doesn't seem finished yet.

[rob@vems.co.uk]

I'd get a 1-2mm steel disk bolted to the front of that pulley with a single hole drilled in.

[dnb]

Funny you should say that Rob.  I think I have one kicking around here somewhere...

Snag is that there's not a lot of room on the late serpentine timing covers to fit it in - no allowance in them for fitting a dizzy.

[mattias]

If you're using a Honeywell GT1, better make it a tooth instead of a hole. It triggers better on "teeth".

[Seight-v8]

might sound stupid to ask.

but does the sensor trigger on the gaps or the solid parts of the sprocket?.

just thinking of a few ideas.

cheers

scott