The circumerence changes alot with tyre wear. :thumb:
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The circumerence changes alot with tyre wear. :thumb:
sure they do... but still a more accurate speed reading than none, or a gearbox driven one without knowing what size wheels are being run :thumb:
nice neet install of the speedo mr olly. and the slicks on cesaros looks hard core
Defo doing mine now!!!Quote:
Originally Posted by trackdaynova
told you it looked good :D
kool olz likin it
Sorry, not critisizing the product, yes it is very good, just pointing out that the device might be 99.999%, but the input might not be. Still far better than any standard speedo.Quote:
Originally Posted by trackdaynova
Thanks Chaps!
Ste - deffo do yours too :)
Martin - thanks pal
MC - certainly mate, I'm not going to be changing the circumference each time I change the wheels, unless I can be a r s e d lol I'm just looking forward to knowing what speed I'm doing certain corners, especially @ Donny down the craner curves as I know I carry some knots down there - would like a G meter too ideally :)
They are very good coming from years of using one, the differences within the tyre wear to speed related, although not massive, can suprise still lol
Just out of curiosity, when you measered the rolling circumference, are your figures based on a wheel being rolled along the ground/measured it as a circle etc, or the wheel being fitted to the car so the squish of the tyre is taken into account, then rolling it backwards/forwards a number of times to compare and average out (obviously with a mark on the tyre and a mark on the ground at every point the tyre point makes contact).
Only reason for my asking is following on from marks comment, that the speedo is very accurate, but soley dependant on how accurate the input it receives is (also as others my use your settings for road applications)
I did exactly what you said on your second point.
I marked the tyre, with the weight of the car on the tyre I rolled the car forward and back once and marked the floor, only did it twice mind.
It states in the instructions over and over that it is only accurate if you input the details correctly.
There is an auto-calibration setup, whereby you drive along a 1/4mile stretch of road, and it calibrates it itself, however I don't fully understand how that can work...
Ping-pong ball & pudding bowl? lolQuote:
Originally Posted by trackdaynova