speed sensor..
speed sensor..
hi.. wondering if you can help me out.. i was wondering if i could pick up my speed from the gearbox speed sensor or anywhere else off my car without purchasing a speed sensor.. (celica gt4)
Most speed sensors in OEM applications are variable reluctance sensors. The signal is pretty dirty and you need a converter box to get them into square wave - which he DL1 can understand.
It's less hassle to mount your own hall effect sensor. I've mounted mine through the brake baking plates to pick up a bolt on the back side of the front bearing flange. Iirc the celica is front drive,, so not sure how that would work.
It's less hassle to mount your own hall effect sensor. I've mounted mine through the brake baking plates to pick up a bolt on the back side of the front bearing flange. Iirc the celica is front drive,, so not sure how that would work.
BMW 2000 M Coupe
Yes, one of the frequency inputs. Needs to be enabled via the config tool.
Just make sure it's a hall sensor, not a variable reluctance sensor. Multi tooth wheels on abs rings or cranks are normally VR sensors. You could just put a smallish bolt through the drive sprocket. Or pick up bolt heads on the brake rotor.
FYI - i'm running into a saturation problem at ~100 mph or so. My M8 bolt head isn't big enough. The head passes before it can activate the hall sensor (cherry, not a R-T sensor) Need to machine a bigger target for the sensors to pick up reliably above 100 or so.
Just make sure it's a hall sensor, not a variable reluctance sensor. Multi tooth wheels on abs rings or cranks are normally VR sensors. You could just put a smallish bolt through the drive sprocket. Or pick up bolt heads on the brake rotor.
FYI - i'm running into a saturation problem at ~100 mph or so. My M8 bolt head isn't big enough. The head passes before it can activate the hall sensor (cherry, not a R-T sensor) Need to machine a bigger target for the sensors to pick up reliably above 100 or so.
BMW 2000 M Coupe
osborni wrote:FYI - i'm running into a saturation problem at ~100 mph or so. My M8 bolt head isn't big enough. The head passes before it can activate the hall sensor (cherry, not a R-T sensor) Need to machine a bigger target for the sensors to pick up reliably above 100 or so.
Ack, that sucks. How many pulses per rev, only the one bolt correct?
Your mileage may vary....
One bolt. I have the sensor less than 1mm to the bolt head - need a little clearance in there.
Bolt head just isn't big enough - or not enough magnetic variation relative to the face of the bearing. (as I write this....) might make sense to space the bolt head out a bit more to get more delta Gauss... dunno - speculating.
I was going to machine a little steel block though.... simple enough.
One bolt. I have the sensor less than 1mm to the bolt head - need a little clearance in there.
Bolt head just isn't big enough - or not enough magnetic variation relative to the face of the bearing. (as I write this....) might make sense to space the bolt head out a bit more to get more delta Gauss... dunno - speculating.
I was going to machine a little steel block though.... simple enough.
BMW 2000 M Coupe
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