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 Post subject: 250-DS-UDXSR question
PostPosted: Thu Nov 29, 2007 10:08 pm 
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Joined: Mon Nov 19, 2007 6:32 am
Posts: 3
On pins 6-7 (turn signals), and 9 (high beam) of port A. What is the maximum current that these pins can withstand?

For example, tapping a high beam signal could potentially send 30A to pin 9. Can the unit withstand this much spike?

Thanks.


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PostPosted: Tue Dec 04, 2007 11:28 pm 
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Joined: Thu Sep 27, 2007 5:20 pm
Posts: 39
On the Street Rod Dash we are just tapping in on the signal for the high beam. Since we are just taping in on the signal you will not get 30A of current to the pin on the Racepak dash. Typically the current is much less that the dash will see because we are just tapping in on the signal wire. So you should be ok.


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PostPosted: Thu Dec 20, 2007 5:41 pm 
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Joined: Mon Nov 19, 2007 6:32 am
Posts: 3
Hi, thanks for the response. Quick follow up question.

Setup parameter #9, speedometer pulses per revolution, and #11, speedometer pulses per mile/km.

My question is what is the settings in #9 used for if #11 specifies the number of pulses per mile?


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PostPosted: Mon Dec 31, 2007 8:08 pm 
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Joined: Thu Sep 27, 2007 5:20 pm
Posts: 39
Parameter # 9 is how many times the sensor is triggered during one revolution. Setup parameter #11 counts the total puls for the mile. Unless you have calculated the pluses out for the mile, I highly suggest to use the speedometer calibration function that auto calibrates it for you.

Hope this helps


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PostPosted: Wed Jan 02, 2008 12:19 am 
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Joined: Mon Nov 19, 2007 6:32 am
Posts: 3
Thanks for the response.

I understand that #9 is VSS pulses per revolution and #11 is VSS pulses per mile.

I don't know how #9 is used for anything at all. If you know the number of VSS pulses per mile, what do you need to set #9 to?

For example, I know that my driveshaft rotates 3520 revolutions per mile. I don't know how many times my VSS pulses per driveshaft revolution. I could theoretically set #11 to interger multiples of 352 until I get the correct speed as measured by radar or pacing.

If this is possible, I don't understand how #9 is used for anything since I would have already known the exact number of VSS pulses per mile.

I'm also doing the 1 mile calibration on the dyno as well, but the dyno operator would like to know how #9 is used to calculate the speed. Otherwise I'm going to leave #9 at the stock setting of 16 and have him drive the mile for #11.


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