|
Re: Speedometer RPM to Speed ratio?
[Re: AndyF]
#2836951
10/24/20 03:03 PM
10/24/20 03:03 PM
|
Joined: Jan 2003
Posts: 25,748 Rio Linda, CA
John_Kunkel
Too Many Posts
|
Too Many Posts
Joined: Jan 2003
Posts: 25,748
Rio Linda, CA
|
1000 rpm = 60 mph. 1000 turns = one mile on the odometer.
The INTERNET, the MISinformation superhighway
|
|
|
Re: Speedometer RPM to Speed ratio?
[Re: DrCharles]
#2837317
10/25/20 03:05 PM
10/25/20 03:05 PM
|
Joined: Jan 2003
Posts: 25,748 Rio Linda, CA
John_Kunkel
Too Many Posts
|
Too Many Posts
Joined: Jan 2003
Posts: 25,748
Rio Linda, CA
|
Remember that the tire diameter * pi is not exactly the same as the rolling diameter. This is probably the most important part of speedo calibration, advertised diameter varies. My most recent experience was with a tire that had an advertised diameter of 28" but was actually 26 3/4" computed from the rollout.
The INTERNET, the MISinformation superhighway
|
|
|
Re: Speedometer RPM to Speed ratio?
[Re: John_Kunkel]
#2837386
10/25/20 07:23 PM
10/25/20 07:23 PM
|
Joined: Dec 2004
Posts: 10,552 Rittman Ohio
fourgearsavoy
I Live Here
|
I Live Here
Joined: Dec 2004
Posts: 10,552
Rittman Ohio
|
You can get a more accurate measurement from a road force tire balancer as it applies force to the tire while it measures the actual diameter. I've measured slicks before on our balancer at the shop and it works very well Gus
Last edited by fourgearsavoy; 10/25/20 07:23 PM.
64 Plymouth Savoy 493 Indy EZ's by Nick at Compu-Flow 5-Speed Richmond faceplate Liberty box Dana 60
|
|
|
|
|
|