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chrisw
06-03-2008, 03:02 PM
after getting a speeding ticket recently (I dont' think I was speeding, but the park ranger was a prick)


anyhow, after retaining a lawyer, I need to verify my speedometer is reading correctly. I know there is a place in Palo alto that the CHP uses, but unfotunetly, to calibrate the speedo, I need to put the car on a dyno...

So, who can show (in a very legal fashion) that my speedo is in fact reading correctly so that I can (in a very legal, politically correct way) tell this park ranger to fuck off.

The dyno MUST be AWD friendly, and be calibrated to the correct speed, and I need this done before the 16th.

thanks in advance.

earlyapex aka jack ass
06-03-2008, 04:43 PM
Would depend on how different your wheel/tire combo is to stock.

We should be able to do it on our dyno Chris.

chrisw
06-03-2008, 04:48 PM
Would depend on how different your wheel/tire combo is to stock.

We should be able to do it on our dyno Chris.




cool.Â* Is the speed reading on your dyno calibrated?Â* this is critical.

I will have a tech call me from a place in palo alto, Palo Alto Speedometer, and they do the "roller" tests for the CHP.Â*

I need to verify the details of the test, and then I will let you know.

link
http://www.paspeedo.com/

earlyapex aka jack ass
06-03-2008, 04:57 PM
I believe it is, but I can double check.

You should be able to do this by gear ratio math as well.

Here is a glimpse of the 03-05 Evo 5spd Rpm/Mph per gear, given a 235/45/17 tire (tire diameter 25.32):

2nd gear:

2500 21.5
2600 22.3
2700 23.2
2800 24.0
2900 24.9
3000 25.7
3100 26.6
3200 27.5
3300 28.3
3400 29.2
3500 30.0
3600 30.9
3700 31.7
3800 32.6
3900 33.5
4000 34.3
4100 35.2
4200 36.0
4300 36.9
4400 37.8
4500 38.6
4600 39.5
4700 40.3
4800 41.2
4900 42.0
5000 42.9

3rd gear:

2500 29.7
2600 30.9
2700 32.1
2800 33.3
2900 34.5
3000 35.7
3100 36.9
3200 38.1
3300 39.2
3400 40.4
3500 41.6
3600 42.8
3700 44.0
3800 45.2
3900 46.4
4000 47.6
4100 48.8
4200 49.9
4300 51.1
4400 52.3
4500 53.5
4600 54.7
4700 55.9
4800 57.1
4900 58.3
5000 59.5

4th gear:

2500 40.6
2600 42.2
2700 43.8
2800 45.4
2900 47.1
3000 48.7
3100 50.3
3200 51.9
3300 53.6
3400 55.2
3500 56.8
3600 58.4
3700 60.0
3800 61.7
3900 63.3
4000 64.9
4100 66.5
4200 68.2
4300 69.8
4400 71.4
4500 73.0
4600 74.7
4700 76.3
4800 77.9
4900 79.5
5000 81.1

If you can give your current tire size I can plug that into the calculator.

chrisw
06-03-2008, 05:31 PM
245/45/17

earlyapex aka jack ass
06-03-2008, 05:38 PM
For 245/45/17:

2nd:

RPM MPH
2500 21.8
2600 22.6
2700 23.5
2800 24.4
2900 25.2
3000 26.1
3100 27.0
3200 27.8
3300 28.7
3400 29.6
3500 30.5
3600 31.3
3700 32.2
3800 33.1
3900 33.9
4000 34.8
4100 35.7
4200 36.5
4300 37.4
4400 38.3
4500 39.2
4600 40.0
4700 40.9
4800 41.8
4900 42.6
5000 43.5

3rd:

RPM MPH
2500 30.1
2600 31.4
2700 32.6
2800 33.8
2900 35.0
3000 36.2
3100 37.4
3200 38.6
3300 39.8
3400 41.0
3500 42.2
3600 43.4
3700 44.6
3800 45.8
3900 47.0
4000 48.2
4100 49.4
4200 50.6
4300 51.8
4400 53.1
4500 54.3
4600 55.5
4700 56.7
4800 57.9
4900 59.1
5000 60.3


4th:

RPM MPH
2500 41.1
2600 42.8
2700 44.4
2800 46.1
2900 47.7
3000 49.4
3100 51.0
3200 52.7
3300 54.3
3400 55.9
3500 57.6
3600 59.2
3700 60.9
3800 62.5
3900 64.2
4000 65.8
4100 67.5
4200 69.1
4300 70.8
4400 72.4
4500 74.1
4600 75.7
4700 77.3
4800 79.0
4900 80.6
5000 82.3

chrisw
06-03-2008, 05:43 PM
that's what I thought. the whole time the fuck prick of a park ranger was behind me I was 4th gear, under 3000rpm. there is no way in hell I was going as fast as he claimed (55).

earlyapex aka jack ass
06-03-2008, 05:55 PM
that's what I thought. the whole time the fuck prick of a park ranger was behind me I was 4th gear, under 3000rpm. there is no way in hell I was going as fast as he claimed (55).


Well, you can't argue with gear ratios. That is the bible. :)

If you can prove you where 3300 or under then there is no argument.

AreSTG
06-03-2008, 05:55 PM
what kind of athority do park rangers have? other than to tell u to leave, or call the cops to come talk to you?

chrisw
06-03-2008, 06:20 PM
what kind of athority do park rangers have? other than to tell u to leave, or call the cops to come talk to you?


well, considering that I got pulled over near rt9 & rt35, in the middle of the state park, I would say he had a lot of authority.