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Author Topic: Which speedo?  (Read 137 times)

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Which speedo?
« on: 18 July 2012, 08:35:24 pm »
Right anyone know
Tdi, series 3 box and transfer case, 3.45 diffs and 7.50 tyres
Fed up of guessing my speed, so how many tpm needs to be on the front of my next speedo?
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Does anyone read these? Does anyone know what half the crap down here means?
New land of the 5p bag!!! YOU HAVE BEEN WARNED!!!

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Re: Which speedo?
« Reply #1 on: 18 July 2012, 08:48:49 pm »
I would say summat like 3.54 / 4.7 = 0.75, so 1408 x 0.75 = 1056 and 1376 x 0.75 = 1032.

Finding summat with a TPM of between 1032 and 1056 I would assume would be the closest match, however I ain't no expert and could have **** that calculation up totally.
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'55 107 truck cab ✪ '66 109 hardtop ✪ '66 109 LHD ex-MOD ambulance ✪ '71 109 one ton ✪ '72 88 2.5 petrol ✪ '72 2B FC Dorothy Perkins 4.236 ✪ '79 Lightweight LHD ✪ '79 109 LHD ✪ '83 109 FFR ✪'93 Dennis Rapier fire engine ✪'94 Range Rover Vogue Tdi...and an '86 SAAB 9000 turbo

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Re: Which speedo?
« Reply #2 on: 18 July 2012, 09:06:03 pm »
I put a formula up here a couple of months ago:

Here
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