Nismo280zEd Posted August 24, 2008 Share Posted August 24, 2008 I was just thinking... The Z and the 240sx have the same size flywheel, same thickness, same bolt pattern, etc. Only difference between the two is a reference pin in the 240sx flywheel for orientation purposes. They share the same clutch size, etc. So I was thinking, 95-98 240sx use a sensor mounted on top of the transmission (called crank angle sensor) to time the car. I'm wondering, if you swapped the flywheel from a 95-98 240 and drilled a hole in the z transmission for the sensor, couldn't you use this for a trigger for MS? Quote Link to comment Share on other sites More sharing options...
WizardBlack Posted August 24, 2008 Share Posted August 24, 2008 Hmm, are you referring to the KA24DE motor? Maybe look up some S13/S14/S15 forums and see if they've done it natively with a Megasquirt. Quote Link to comment Share on other sites More sharing options...
Nismo280zEd Posted August 25, 2008 Author Share Posted August 25, 2008 yes the ka24de motor specifically 95-98 chassis. I looked it up in the manual, crank shaft position sensor, sense the height changes from low to high in teeth creating a magnetic field. The sensor is magnetic. the manual says it's mainly for diagnostic use in detecting misfire, which i don't really understand. However, I know for a fact that if this sensor is damaged or unplugged, the car will not run. I'll have to see if somebody has a spare KA flywheel lying around to see if there are magnets in it or something or a shorter tooth, or missing tooth. -Ed Quote Link to comment Share on other sites More sharing options...
Matt Cramer Posted August 25, 2008 Share Posted August 25, 2008 The Megasquirted KAs out there so far have all used the optical pick-up in the distributor. I'm not aware of anyone who's used the flywheel sensor. Quote Link to comment Share on other sites More sharing options...
WizardBlack Posted August 25, 2008 Share Posted August 25, 2008 yes the ka24de motor specifically 95-98 chassis. I looked it up in the manual, crank shaft position sensor, sense the height changes from low to high in teeth creating a magnetic field. The sensor is magnetic. the manual says it's mainly for diagnostic use in detecting misfire, which i don't really understand. However, I know for a fact that if this sensor is damaged or unplugged, the car will not run. I'll have to see if somebody has a spare KA flywheel lying around to see if there are magnets in it or something or a shorter tooth, or missing tooth. -Ed It sounds as if the flywheel sensor may be accurate enough to detect very short term changes in rotational speed (misfires) but isn't accurate enough to be used as a crank position sensor, then. Quote Link to comment Share on other sites More sharing options...
Nismo280zEd Posted August 25, 2008 Author Share Posted August 25, 2008 sounds like the "crankshaft position sensor" is acting more like a speed sensor then. I know most 240's use the optics on the dizzy, but this would be a really cool setup if i could get this to work, then it could be transfered over to the Z without having to modify the harmonic balancer. Quote Link to comment Share on other sites More sharing options...
ZXT_bean Posted August 25, 2008 Share Posted August 25, 2008 i think there would be way to many teeth, or they would be really spaced apart. which would translate into a weak signal IMO. but would be worth looking into Quote Link to comment Share on other sites More sharing options...
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