Did Procal mess this up

[DaddyO]

No not exactly specific to those tires. But yes 37s. When I did the math for my 37" Kendas it was lower than that. But I had several weird problems. I adjusted it a couple different times higher and lower so I didn't think 579 would work but somehow it was actually right on.

Different manufacturers have different tire measurements such as revolutions/mile and that's why I asked about the big KO2's.

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[Brian_B]

There is a magic number in there where... the cal will be accepted, the speedo will calibrate, but it will throw an error if you try to use Cruise Control until you reduce the size back down a bit. I have it in my 38" tire thread but too lazy/drunk to search at the moment.

 

[GI_Jo_Nathan]

Different manufacturers have different tire measurements such as revolutions/mile and that's why I asked about the big KO2's.

Yep, I know. But sometimes it takes a bit of tweeking to make the computer happy.

 

[JL8jeff]

Different manufacturers have different tire measurements such as revolutions/mile and that's why I asked about the big KO2's.

The BFG KO2's run small for 37's, most manufacturers claims on size seem to be overestimated (like stock Sas Goodyears). Do you have the C rated version of KO2?

 

[DaddyO]

The BFG KO2's run small for 37's, most manufacturers claims on size seem to be overestimated (like stock Sas Goodyears). Do you have the C rated version of KO2?

Yes

 

[Old Codger]

 

[DaddyO]

Thank you, will try that

 

[DaddyO]

Set it to bfg website stock # for the KO2’s and BAM IM NOW ONLY 1 mph off from my gps and that’s acceptable. Also no more error code. YAY thanks to everyone that waded in with advice. Next to upgrade my gears or not.

 

[DaddyO]

And in response to my own question, YES Procal interfered with my Bronco and disabled crossed and threw that error message. All bc I had inserted the wrong number for the revolutions per mile.

 

[23OBX2.7]

And in response to my own question, YES Procal interfered with my Bronco and disabled crossed and threw that error message. All bc I had inserted the wrong number for the revolutions per mile.

So basically Procal worked perfectly upon the instructions you gave it, often known as user error, that happens to all of us.

 

[DaddyO]

GIGO

 

[JL8jeff]

Set it to bfg website stock # for the KO2’s and BAM IM NOW ONLY 1 mph off from my gps and that’s acceptable. Also no more error code. YAY thanks to everyone that waded in with advice. Next to upgrade my gears or not.

So what did you have the number set at for the 37's that caused the problems? I just checked my Procal and it's set at 606 which makes sense for the factory 35's (which are closer to 34) but the speedo always read high compared to speed traps and it seems dead on for the BFG 37's. I'm going to check against a GPS app later today to see what that shows.

 

[crenca]

I'm going to check against a GPS app later today to see what that shows.

That's the way to do it. The speed checks in my area always read about 1mph slow, I assume the city giving a bit of lee way...

 

[JL8jeff]

So I checked with GPS today and my speedo is around 1 mph slow compared to GPS so it's actually closer with the KO2 37's than it was with the stock Goodyear 315 (35's).

 

[DaddyO]

I check my speed against my gps and shows 2mph difference. What did you set your revolutions at?

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