If possible looking for Speedo/Tachometer pics of JTDiesel auto w/ 37's and 4.56 gears @ 55,65 mph

[MaxStrategery]

The results are wrong when you input wrong data. Junk in, junk out.

It’s math. It’s never wrong.

Data is correct. Not a single one of their tables relates to real world rpm/speed. Not one.

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[ShadowsPapa]

Data is correct. Not a single one of their tables relates to real world rpm/speed. Not one.

That's likely because of differences in tire heights, inflations and so on. Rolling circumference matters -and that can vary from one 37" tire to another by a fair amount.
How can you say a calculator that takes something like 3x4 and comes up with 12 is wrong?
All of it is mathematically correct, it's the real world that's skewed or wrong.
For one thing -
did you go in and tell your Jeep that it now has different gears?
Did you go in and tell it about the new tire size?
(I guess that's two things, ok, fine)

If not, the faulty data is on your end.
If you change gears, you need to reprogram the thing.
If you change tire sizes, you also need to plug that in.
IF you did that, then maybe your tire size calculations are incorrect! Do not use the "37" bit as no 37" tire is even close to that. A 33 is only typically 32.8" so anyone who plugs in 33" will screw it up.

(I always hate that "the most reputable gear shop in town" bit - too often it's because the others are worse, or, no one has yet caught the mistakes, or, no one knows any better. No shop is perfect, and sounds to me like they were on something other than coffee that day asking for such BS info - stuff a reputable shop would already know off the top of their head if they do that many gear swaps)

 

[Jefe1018]

That's likely because of differences in tire heights, inflations and so on. Rolling circumference matters -and that can vary from one 37" tire to another by a fair amount.
How can you say a calculator that takes something like 3x4 and comes up with 12 is wrong?
All of it is mathematically correct, it's the real world that's skewed or wrong.
For one thing -
did you go in and tell your Jeep that it now has different gears?
Did you go in and tell it about the new tire size?
(I guess that's two things, ok, fine)

If not, the faulty data is on your end.
If you change gears, you need to reprogram the thing.
If you change tire sizes, you also need to plug that in.
IF you did that, then maybe your tire size calculations are incorrect! Do not use the "37" bit as no 37" tire is even close to that. A 33 is only typically 32.8" so anyone who plugs in 33" will screw it up.

(I always hate that "the most reputable gear shop in town" bit - too often it's because the others are worse, or, no one has yet caught the mistakes, or, no one knows any better. No shop is perfect, and sounds to me like they were on something other than coffee that day asking for such BS info - stuff a reputable shop would already know off the top of their head if they do that many gear swaps)

He’s back with snark and all!!! /hugs

 

[Vtur]

what is this gauge?

Scangauge 2

 

[TheSolarWizard]

Scangauge 2

Does it conflict with the tazer ?

 

[Vtur]

That helps, I'm at 1800 @ 75 with 37's stock gears. So there is no precision at all with the almighty calculators that much is proven and slight tire variances in diameter don't explain 200 rpm variance so Im going with the person who placed the electrical wires against the heat shielding and against the exhaust pipes that are now shorting out the the wires might be the same person who setup the speedometers.

Here's 75mph rpm at 1949. 150 higher than your.

 

[Vtur]

Does it conflict with the tazer ?

It's connected to the obd port.

 

[TheSolarWizard]

Here's 75mph rpm at 1949. 150 higher than your.

How close is your speedometer to your gps and what 37s are on your Jeep?

this is probably my best data point against predicting my rpm when I move up to 4.88 & 42.

 

[Wheelin98TJ]

Data is correct. Not a single one of their tables relates to real world rpm/speed. Not one.

Show us what tables you are referring to.

 

[ShadowsPapa]

Show us what tables you are referring to.

Could he be seeing those old Wrangler tables that keep popping up?

 

[sharpsicle]

Data is correct. Not a single one of their tables relates to real world rpm/speed. Not one.

Could you take a quick break from replying to yourself and show your work? What's the calculation supposed to be if all the calculators are wrong? Chances are you simply have inaccurate inputs, as things like "37s" rarely equals a true 37" tire.

There's clearly a lot that you still don't understand, and I'm beginning to believe you've made up a lot of your story here just to try to get people to sniff your farts with you.

 

[Wheelin98TJ]

Could he be seeing those old Wrangler tables that keep popping up?

He actually said every single table and calculator is wrong. ?

The calculator are wrong, all of them

Data is correct. Not a single one of their tables relates to real world rpm/speed. Not one.

 

[ShadowsPapa]

He actually said every single table and calculator is wrong. ?

Einstein and Newton were full of it, too I suppose....
I might agree with some versions of Excel being wrong.

 

[MaxStrategery]

That's likely because of differences in tire heights, inflations and so on. Rolling circumference matters -and that can vary from one 37" tire to another by a fair amount.
How can you say a calculator that takes something like 3x4 and comes up with 12 is wrong?
All of it is mathematically correct, it's the real world that's skewed or wrong.
For one thing -
did you go in and tell your Jeep that it now has different gears?
Did you go in and tell it about the new tire size?
(I guess that's two things, ok, fine)

If not, the faulty data is on your end.
If you change gears, you need to reprogram the thing.
If you change tire sizes, you also need to plug that in.
IF you did that, then maybe your tire size calculations are incorrect! Do not use the "37" bit as no 37" tire is even close to that. A 33 is only typically 32.8" so anyone who plugs in 33" will screw it up.

50 rpm difference on tire variance is realistic not 200 which is showing up, yes everything programmed for tire size. 4 vehicles same setups variances all over the place, so real world is not related to the tables at all and none of this was ever about calculators, the purpose of this thread was to see the variances for myself, calculators are fine for a snapshot but they aren't correlating with real world on multiple vehicles.

He actually said every single table and calculator is wrong. ?

You all have eyes, but cannot see. Ears but cannot hear. There is no medicine for you.

 

[Gvsukids]

4 vehicles same setups variances all over the place, so real world is not related to the tables at all and none of this was ever about calculators, the purpose of this thread was to see the variances for myself, calculators are fine for a snapshot but they aren't correlating with real world on multiple vehicles.

Take the average of the four vehicles. If that doesn't sass by you then I don't know if you will be.

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