Tires: Revolutions per mile
wooooo woooooooooo
Joined: Mar 2002
Posts: 3,134
Likes: 0
From: Twin Cities
now you have to take into concideration that a car that is 10 years old won't have an accurate speedometer anyway... The ring gear in the tranny will wear, the servor motor in the gauge may wear and be off a bit, and any bit of the wiring may corrode causing a change in the signal... So, basically, you haven't proven jack, other than you wasted time trying to perfect something that will never be an exact science.
Thread Starter
I'm made of meat!
Joined: Mar 2003
Posts: 3,580
Likes: 0
From: Richmond, VA
Is it a waste of time, or preventing people from wasting money. I've already gathered my opinion of the points you raised and have a few questions.
How does the ring gear wearing affect the calibration of a 92+ Honda of any civic model that gets its signal from a magnetic switch? It still spins at the same speed.
How would corroded wires change the frequency of a signal for an electronic speedometer that doesn't rely on voltage?
How many cases are there of servo motors going out of calibration if they still work? Stepper motors are the ones that get weak with age. Servos
correct themselves on the fly. That's why servos are used for precision instruments.
If you can tell me why those equations are incorrect, I'd be glad to hear it. Every 5th question on this board is a "what wheel/tire sizes work on my civic?" I just posted the math that lets anyone answer the most commonly asked question here. Just because you can bolt it on doesn't make it "work".
The principles of those equations apply to all cars new and old. Whether or not any part of your car is functioning properly, an X diameter wheel is still going to turn Y number of times in order to travel 5280 feet. Use those if you want to make an educated wheel/tire purchase. Going bigger than recommended on a car that produces no torque to begin with is the worst thing you can do to it. Don't believe me? Dyno your car before and after changing wheels.
As for the exact science, the science IS exact. Gears don't slip unless they're broken, and your ratios won't change over time. It's just not likely that you'll find tires other than the OEM size that exactly fit your car's design. You can at least find what fits within 3% accuracy as reccomended so that you don't negatively affect your car's performance, but you have to know where to start. How is sharing that information a waste of time? Oh nevermind, I'm still typing.
How does the ring gear wearing affect the calibration of a 92+ Honda of any civic model that gets its signal from a magnetic switch? It still spins at the same speed.
How would corroded wires change the frequency of a signal for an electronic speedometer that doesn't rely on voltage?
How many cases are there of servo motors going out of calibration if they still work? Stepper motors are the ones that get weak with age. Servos
correct themselves on the fly. That's why servos are used for precision instruments.
If you can tell me why those equations are incorrect, I'd be glad to hear it. Every 5th question on this board is a "what wheel/tire sizes work on my civic?" I just posted the math that lets anyone answer the most commonly asked question here. Just because you can bolt it on doesn't make it "work".
The principles of those equations apply to all cars new and old. Whether or not any part of your car is functioning properly, an X diameter wheel is still going to turn Y number of times in order to travel 5280 feet. Use those if you want to make an educated wheel/tire purchase. Going bigger than recommended on a car that produces no torque to begin with is the worst thing you can do to it. Don't believe me? Dyno your car before and after changing wheels.
As for the exact science, the science IS exact. Gears don't slip unless they're broken, and your ratios won't change over time. It's just not likely that you'll find tires other than the OEM size that exactly fit your car's design. You can at least find what fits within 3% accuracy as reccomended so that you don't negatively affect your car's performance, but you have to know where to start. How is sharing that information a waste of time? Oh nevermind, I'm still typing.
wned: