Speedo not quite right
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  1. #1
    Fellow Frogger!
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    Speedo not quite right

    Hey guys,
    my speedo is around 10mph (poss more) out of kilter (ie reading 50mph with traffic doing 60+). I got the original speedo cable from the 17 and got the 18 end grafted onto it. It all fits like it should but obviously something isn't quite right. The realise having different wheels will put the speedo out by some amount but not much as they are basically the same rolling diameter. Any thoughts- easy fixes?

    By the way- the car now has a warrant of fitness!~no questions asked about the different motor/gearbox- shortened halfshafts, modified a arms etc etc- gotta love 'obscure' french cars....

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  2. #2
    Simon's Avatar
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    Probably a mis-match between the speedo drive gears inside the gearbox and the speedo itself. Take it into a speedo place they may be able to reset the speedo to suit the drive gears.

    Simon
    1963 Renault R4 Van
    1964 Renault R4
    1967 Volkswagen 1300 Deluxe
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  3. #3
    Too many posts! JohnW's Avatar
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    Greetings from WA.

    If you read the original Wheels road test of the later R12 (or maybe the Virage) they commented tha the speedo was about 10 km/h under-reading.

    Our Virage has always read about 10 km/h low by about 60 km/h. Nasty with radar everywhere!

    Sounds like the same thing.

    I don't know of a fix beyond reducing tyre diameter by an appropriate amount!! Just live with it is my advice.

    Cheers

    John W
    JohnW

    Renault 4CV 1951
    Renault R8 1965
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  4. #4
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    Same here. The R12 reads out by up to 12-15 km under by 100+ k's. I've actually got a post it note stuck on it with revs v speeds for those times you see a camera before it snags you (until I remember).

    John W - There's a good instrument place in Subiaco called Tisco 74 (name ? don't ask me) that can recalibrate etc. I know you're not worried, but in case you need to know in the future. They've been there for years and have a fascinating stock of old instruments under the counter. I took a classic 60's pod tacho there that had no wires, and they wired it up and gave it back with labels on the wires. Love these old fashioned places...

    PS is your 16 lightish olive green? Saw one in East Perth today, 16TS in great nick...

    Stuey


    2003 PEUGEOT 206 GTi

  5. #5
    Too many posts! JohnW's Avatar
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    Stuey,


    I discovered Tisco by chance a few years back, but went back recently for something or other and found they'd moved! Just so you know to check, unless I've got the wrong place.

    Not my 16. They're still around, aren't they! I saw a very straight Avocado Green one at Euromotive a year or two ago. A friend of ours in Millicent, SA, just retired his 16TL at about 25 years and 325,000 km from new. Original pretty well everything (including rust!) and I don't think it broke down once.

    Ours is a deep metallic bronze 16TS Special. I've just put it on concessional licensing so it won't be out a lot.

    Cheers

    John
    JohnW

    Renault 4CV 1951
    Renault R8 1965
    Renault Scenic 2005 (wife's)
    Renault Scenic 2007 (mine)
    Renault Scenic 2006 (daughter's)
    CitroŽn CX Pallas 1980

    National Co-ordinator, Renault 4CV Register of Australia

  6. #6
    Fellow Frogger!
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    Hey guys,

    yeah Simon that was more what I was thinking about- it's not just out a little bit- it's out throughout the rev range.

    I'll try to get it to a specialist instrument place to see if they can solve it.

    Ben

  7. #7
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    Funny timing, but after this post I read an article in a classic car mag about how older speedos get dust etc. in them and build up friction, then start showing low. Maybe a blow out and a tiny bit of sewing machine oil/3-in-1 oil in the works will do the trick. Of course, bearing in mind what John said above, in that they could have been out when they were new, which is likely.

    Stuey


    2003 PEUGEOT 206 GTi

  8. #8
    VIP Sponsor David Cavanagh's Avatar
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    Another trick is to visit a cable manufaturer and get a stepper gear fitted into the speedo cable, we've done this a few times on different conversions.
    David.
    David Cavanagh

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  9. #9
    Fellow Frogger!
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    Hey Dave,

    so how does the crowd fixing the cable know what sort of a stepper gear to fit?- do you need to tell them how far out it is- i.e 10% and then they add? a gear at a reduction/addition? of 10%??

    Is this something I should be able to expect any decent gauge reconditioning place to be able to do?- I have been getting my cables altered by a local ex-airforce guy- who seems to know his stuff.

    Basically; is there anything I should be telling or asking him about it?

    Cheers Ben

  10. #10
    VIP Sponsor David Cavanagh's Avatar
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    Yeah Ben, there is a way to work out exactly how far out it is, the cable makers can do it, I can't remember off the top of my head. Something about measuring a 10th of a kilometre and rolling the car over it to see how far the odometer turns and then calculate it out from there. We've done a few Fuego box into R12 or R17 and they usually get them close enough.

    David.
    David Cavanagh

    FRENCH CONNECTION / PEUGEO WRECKING / RENOSPARES / CITROWRECK

    03 9338 8191 or 03 93354008

    34 KING St
    AIRPORT WEST
    VIC 3042


    [email protected]

    https://www.facebook.com/FrenchConect

  11. #11
    Member Freddie's Avatar
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    [quote]Originally posted by David Cavanagh:
    <strong>Yeah Ben, there is a way to work out exactly how far out it is, the cable makers can do it, I can't remember off the top of my head. Something about measuring a 10th of a kilometre and rolling the car over it to see how far the odometer turns and then calculate it out from there. We've done a few Fuego box into R12 or R17 and they usually get them close enough.

    David.</strong><hr></blockquote>

  12. #12
    Member Freddie's Avatar
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    [quote]Originally posted by Freddie:
    [QB][/QB]<hr></blockquote>bit hasty on K/B last message - David I have a conversion box in my 17 - <$200 - they use a handheld GPS which samples at least every second for position and most have a speed mode - dual units as well so they checked at 50MPH -who can see those tiny orange metric speed marks anyway? - now very accurate and all for the cost of a speeding ticket

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