Thanks, man! My C900 has worn speedo cable - Saab 9000 Bulletin Board - Saabnet.com
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Thanks, man! My C900 has worn speedo cable
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Posted by Siegfried (more from Siegfried) on Sun, 16 Mar 2008 18:35:46 Share Post by Email
In Reply to: 9832 pulses/km, Ari [Profile/Gallery] , Sun, 16 Mar 2008 16:51:48
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And I assume the best fix is just to turn to 9K speedometer. Just count:
- cable for speedometer
- speedometer sensor for injection ECU (I've got Lucas and it uses speed input for adaptive purposes), cruise control and other stuff
- ABS which definitely knows the right speed; and has a summ output btw
ABS ECU will gimme source pulses (46 per wheel rev for M1990+ models; it doesn't depend on tires, uh?) and it's not a big deal for me to build up frequency converter.

I haven't tried it yet but as much as I've heard about 9K speed sensor and its design it should give about one or two pulses per its rotor rev. At last I can ping some local 9K folks here and test their sensors. So the main question is what's the gear ratio between wheel and the shaft that spins the sensor.

Zig

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