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  #1 (permalink)  
Old 04-09-2009, 03:14 PM
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Default BMW VSS pulses per mile

I'm trying to hook up cruise control in my BDR. Anyone knonw the approximate pulses per mile from the factory VSS?

Thanks a pile.
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Old 04-09-2009, 04:31 PM
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That will depend on the number of teeth on the drive and driven gears. Could vary greatly.
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Old 04-09-2009, 06:33 PM
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BMW VSS is 7100.
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Old 04-09-2009, 08:26 PM
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Actually, it depends on the rear end gear and the size of tires. If you have 17" wheels and tires, and the rear gear is the newer standard 3:46, then it will be 7960.

If you have taller tires, then the number would go down. I tested this with another car driving side by side at different speeds, and lately I have used the GPS to test it as well.

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Old 04-10-2009, 07:19 AM
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Thanks.
With some tweaking, I got it to work off of the tach sigal only. The Audivox tech guys are not very helpful.

I will do a write up on the install for future reference. Some of the dip switch settings in the instructions are not correct for the V8 engines in a Cobra.
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Old 04-10-2009, 08:14 AM
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sacreligious to put cruse control in a cobra, boredome is the devel workshop!!!
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Old 04-10-2009, 08:36 AM
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Quote:
Originally Posted by madmaxx View Post
sacreligious to put cruse control in a cobra, boredome is the devel workshop!!!

Spoken like someone that puts 250 miles a year on thier Cobra.
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Old 04-10-2009, 10:21 PM
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If your speedo is correct you can follow the directions to calibrate it and see what the VSS is currenty set for.
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Old 04-13-2009, 12:33 PM
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Interesting idea !!

Was it easy? hard?
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