Kombi Speedo Adjustment

grouch Commited Dubber

67 posts · joined Jun 2003 · 27 Aug 2003, 5:07 pm

#79209

Does anyone know if there is a way to adjust the speedo reading ie. my speedo reads approximately 10kph slower than it should at 60kph.

kombikim disfunctionally capable

1,521 posts · joined Dec 2002 · 27 Aug 2003, 5:59 pm

#79238

speedo calibration is done by an instrument maker - costs heaps, better to start at the other end & work back, 1 what size tyres do you have, 2 is the gearbox diff correct for the vehicle & it's speedo ? large diameter tyres will make speedo read slow

Please, I need drivers side window regulator (winder mechanism) for my '54

vw54 Administrator Always Waiting 4 Friday

16,723 posts · joined Aug 2002 · 27 Aug 2003, 6:01 pm

#79239

Best off removing it from the car and getting a Instrument fitter to Overhaul it and or calibrate it for you on the test bed.

We havea couple of places here in Sydney that can do it but i suspect that you have similar shops in Brisbane

I read it on FACEBOOK so it must be true

http://forums.aussieveedubbers.com/viewtopic.php?tid=91278&page=1#pid848630

http://forums.aussieveedubbers.com/viewtopic.php?tid=63561&page=1#pid624099

http://forums.aussieveedubbers.com/viewtopic.php?tid=4832&page=1#pid452603

http://forums.aussieveedubbers.com/viewtopic.php?tid=60650&page=1#pid574409

kombikim disfunctionally capable

1,521 posts · joined Dec 2002 · 27 Aug 2003, 11:08 pm

#79410

sorry made severe mistake - drive for kombi speedos is front wheel ei small diameter tyre will make speedo say you are going faster than you are , large diameter tyre will make speedo say you are going slower than what you are the speedos are & geared & calibrated anticipating a certain size tyre & rolling diameter the odometer is driven by a fixed gear & its accuracy therefore does not vary with wear or age
The needle indicating speed , however is driven indirectly by what i suppose you could call a combination of magnets a spring & centrifugical force & that setup can be subject to inaccuracy when the instrument is so old so - if you sit on exactly 60kmh for exactly 1 minute the odometer should register exactly 1 kilometre & if it does you are wasting a hell of a lot of money to get it cleaned and calibrated, you either have the wrong speedo or wrong diameter tyre

Please, I need drivers side window regulator (winder mechanism) for my '54

1303Steve Scirocco Rare

8,650 posts · joined Aug 2002 · 27 Aug 2003, 11:33 pm

#79413

Hi

I have an aftermarket speedo in my car, I had a ratio box made for it by Speedscreen in Newtown. Have you checked the odometer on one of the freeway sign posts?

VDO now make all their speedos electronic, and they are easily user adjusted.

1302Steve

Purple Martin Fahrvergnugen

913 posts · joined Feb 2003 · 28 Aug 2003, 8:29 am

#79483

kombikim wrote:if you sit on exactly 60kmh for exactly 1 minute the odometer should register exactly 1 kilometre & if it does......

......you know that your tyres are exactly the right size because the odometer is driven by a fixed gear. If the odometer is right but the speedo is wrong, the problem must be in the magnets/spring.

1959 red & white Beetle
1975 Kombi camper

kombikim disfunctionally capable

1,521 posts · joined Dec 2002 · 28 Aug 2003, 8:56 am

#79496

yep that is it
Steve's electric speedo sounds great,

hate to think how much it would cost
a digital speed alert kit from Jaycar might also be a viable option

Please, I need drivers side window regulator (winder mechanism) for my '54

grouch Commited Dubber

67 posts · joined Jun 2003 · 28 Aug 2003, 7:16 pm

#79678

Thanks guys, I believe I have stock rims and tyres. I might do a test run with another car to check the speedo at different speeds.
Might be easier to just mark a spot on the speedo lens at the correct speeds.
🙂