Jump to content


Speedo calibration needed


fireman71000
 Share

Recommended Posts

I have picked up my e type today and very nice it is too, one thing I need help/advice on is that the rear diff has been changed out from the standard to that of what I think is an XJS, an invoice states it as 2-88. Issue is that the speedo is not showing correct and I estimate the road speed to be 10mph higher than what the speedo shows. Any suggestions as to how to rectify, I really need it to be accurate for obvious reasons. Thanks in advance............Adrian

post-5880-0-22582700-1414872618_thumb.jp

Link to comment
Share on other sites

Thanks mate, this owners club site is fabulous, so glad I bought an e type but what a cost to get on this site ha!! Must admit it took me back to my younger days after picking up the old girl today and driving by the seat of my pants with 1970's technology and engineering it just came all flooding back. I'll put a few more pics up for everyone to hopefully enjoy. I live near Warrington and I am looking for a nearby "Classic Jaguar" specialist who knows e types who is reputable and able to service etc. Hopefully someone will come up with suggestions...........

Link to comment
Share on other sites

From what I remember on my old cars there used to be a +/- facility on the rear of the speedo. There is obviously a mathematical equation relating to the new and old ratios but I'm not clever enough to know it. I sure its been asked before and Mr Google will oblige.

 

Another way would be to get someone with cruise control my Mercedes shows you the actual mph on the dash in figures have him/her set it at a given speed and follow them at a set distance for a reasonable time to determine your reading.

 

Try this, it starts with tyre ratios but goes on to gear ratios;

 

http://www.differentials.com/technical-help/differential-gear-ratio-calculator

Link to comment
Share on other sites

Adrian,

 

If you go an motorway there are posts one mile apart, drive at 60 MPH and see how long is takes you over or under 60 seconds.

 

You can get parts on eBay if the worst comes to the worst

 

http://www.ebay.co.uk/sch/i.html?_from=R40&_trksid=p2050601.m570.l1313.TR0.TRC0.H0.Xjaguar+e+type+speedometer&_nkw=jaguar+e+type+speedometer&_sacat=0

 

http://www.ebay.co.uk/sch/i.html?_odkw=jaguar+e+type+speedometer&_from=R40&_osacat=0&_from=R40&_trksid=p2045573.m570.l1313.TR0.TRC0.H0.Xjaguar+e+type+speedometer+cable&_nkw=jaguar+e+type+speedometer+cable&_sacat=0

 

Or if it all becomes too much Kenny and myself will take it of your hands for you.

 

Kenny,

 

Digital speedos tend to over read by an average of 10%, that is why speed cameras are calibrated to allow for error .

 

This is quite interesting

.

http://click2how.com/your-speedometer-wrong-can-drive-faster/

 

ATB,

 

Trevor

Link to comment
Share on other sites


Thanks mate, this owners club site is fabulous, so glad I bought an e type but what a cost to get on this site ha!! Must admit it took me back to my younger days after picking up the old girl today and driving by the seat of my pants with 1970's technology and engineering it just came all flooding back. I'll put a few more pics up for everyone to hopefully enjoy. I live near Warrington and I am looking for a nearby "Classic Jaguar" specialist who knows e types who is reputable and able to service etc. Hopefully someone will come up with suggestions...........

Hi Adrian,

 

Some good suggestions worth trying already.

 

There s a topic on Independent garages in the Jaguar owners lounge and you may find one fairly close to Warrington.  I did not that there is a garage recommended in Manchester in that list of independent garages.

 

I will have a look around and see if I can find what you are looking for.

 

Regards,

 

Peter.

[born and bred in Widnes, but now in exile in the Midlands]

Link to comment
Share on other sites


Adrian,

 

My neighbours, Mr and Mrs Subtitle are from Warrington .

 

I should have bought an E Type instead of wasting my money on the Aston Martins .

 

Saying that, my XKR runs fantastic now that I have had it serviced at a decent garage .

 

How about these Adrian?

 

http://www.autoinsider.co.uk/local/garage-services/ai_68868.php

 

ATB,

 

Trevor

Link to comment
Share on other sites

Adrian,

 

If you go an motorway there are posts one mile apart, drive at 60 MPH and see how long is takes you over or under 60 seconds.

 

You can get parts on Ebay if the worst comes to the worst

 

http://www.ebay.co.uk/sch/i.html?_from=R40&_trksid=p2050601.m570.l1313.TR0.TRC0.H0.Xjaguar+e+type+speedometer&_nkw=jaguar+e+type+speedometer&_sacat=0

 

http://www.ebay.co.uk/sch/i.html?_odkw=jaguar+e+type+speedometer&_from=R40&_osacat=0&_from=R40&_trksid=p2045573.m570.l1313.TR0.TRC0.H0.Xjaguar+e+type+speedometer+cable&_nkw=jaguar+e+type+speedometer+cable&_sacat=0

 

Or if it all becomes too much Kenny and myself will take it of your hands for you.

 

Kenny,

 

Digital speedos tend to over read by an average of 10%, that is why speed cameras are calibrated to allow for error .

 

This is quite interesting

.

http://click2how.com/your-speedometer-wrong-can-drive-faster/

 

ATB,

 

Trevor

 

Trevor, I was under the impression with the car being a classic from an older generation then the speedometer would not have been of the electronic variety. I am aware of the 10% waiver the speed partnerships tend to work to although not all I may add. Some authorities allow 10% + 1mph then others allow 10% + or - 2mph however some will not all the 10% whatsoever.

 

Adrian, take no notice of Trevor, he does not want to take the car of your hands its just me  <_<

Link to comment
Share on other sites

Kenny,

 

The links given are for non digital speedos. it is obviously getting too much for hi, so I'll toss you for it.

 

I used to be under the impression that digital speedos were dead accurate , but far from it. They claim it would be too expensive to produce extremely accurate speedometers, and as one that under reads is an MOT failure, that is why they over compensate.

 

ATB,

 

Trevor

Link to comment
Share on other sites

Kenny,

 

The links given are for non digital speedos. it is obviously getting too much for hi, so I'll toss you for it.

 

I used to be under the impression that digital speedos were dead accurate , but far from it. They claim it would be too expensive to produce extremely accurate speedometers, and as one that under reads is an MOT failure, that is why they over compensate.

 

ATB,

 

Trevor

 

Like everything else in the digital computer age Trevor the accuracy would only depend on the information that it being processed. I can only assume that the gearbox would be giving a signal in terms of speed to the ECU which then displays the reading on the dashboard. Therefore if the gear ratios are incorrect then then the speed would be incorrect which is reflected on the readout. All to complicated, give me back my old Cooper S or TR6 where I just looked at the dial

Link to comment
Share on other sites


Hi guys, I took the car out and a mate drove in his car in front of me at selected speeds of 30 40 and 50mph's, I was right

the speedo is definately out and by around 10mph. It's not a solution as I dont want to be doing maths when driving, but at

least I was right to be aware it was not right.

Link to comment
Share on other sites

Hi guys, I took the car out and a mate drove in his car in front of me at selected speeds of 30 40 and 50mph's, I was right

the speedo is definately out and by around 10mph. It's not a solution as I dont want to be doing maths when driving, but at

least I was right to be aware it was not right.

 

Certainly needs sorting Adrian 10mph is a lot to be out especially in these days of scamera vans

Link to comment
Share on other sites

Hi Adrian,

 

I have found a very easy way to check you speedometer.  We went to Tesco this morning and on three occasions we passed through those speed warning signs.  My speedo read 30 when I was doing 30 and 20 when I was doing twenty.

 

They must have them in Warrington   ----   apparently they have a Rugby League team, of sorts, who play at a Stadium known as the Geri Halliwell.

 

Regards,

 

Peter.

Link to comment
Share on other sites

Hi Adrian,

 

Glad you are getting something organised to cure the problem  --  I will be going North a week on Saturday and will be passing through Warrington to take my cousin to lunch  ---   so I will look out for an E-Type.

 

Regards,

 

Peter.

Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

Loading...
 Share




  • Join The Club

    Join the Jaguar Owners Club and be part of the Community. It's FREE!

  • Topics

  • Our picks

    • Simply Jaguar show at Beaulieu - Sunday 23rd June 2024
      Jaguar Owners Club have a stand at this year's Simply Jaguar event at the National Motor Museum at Beaulieu, Hampshire on Sunday 23rd June 2024

      Tickets are available online here: https://www.beaulieu.co.uk/events/simply-jaguar/
        • Like
      • 1 reply
    • JAGUAR’S LAST PETROL SPORTS CAR: F-TYPE ZP EDITION TAKES THE CHEQUERED FLAG
      Jaguar is commemorating the end of its internal combustion sports car lineage in 2024 with an exclusive limited-edition F-TYPE inspired by two iconic 1960s racing E-types

      Just 150 examples of the F-TYPE ZP Edition will be the last internal combustion-engined sports cars designed by Jaguar. These 575PS supercharged petrol V8 F-TYPEs feature specially curated interior and exterior details by the personalisation experts at SV Bespoke.
        • Like
    • UPDATE SHOW INFORMATION !

      Please find attached your club label – please can this be distributed amongst your club members prior to the event. Please ensure that they print this label and display it in their windscreen upon entry to the event, this ensures that all members wishing to park within your club area are directed to the correct parking location by our stewards. Please do not modify or add logos to the club label.

      We do ask that all individuals have purchased their tickets on an individual basis in advance via our website, to speed up the entry process on the day. This can be done on our website here until 2pm on the day when admission closes: https://www.beaulieu.co.uk/events/simply-jaguar.

      Note that we do have two entrances available, one is exhibitors gate at the bottom of the hill as you come in to Beaulieu, with the other being the normal Simply event entrance within the attraction. Either entrance is fine to use and both are open from 9.00am, with the exhibitors entrance closing around 11am.

      Jaguar Owners Club (1).pdf
    • Simply Jaguar - Beaulieu Motor Museum - 25th June 2023
      Jaguar Owners Club have a stand at this years Simply Jaguar event at the National Motor Museum at Beaulieu, Hampshire on Sunday 26th June 2023

      Tickets are available online here: https://www.beaulieu.co.uk/events/simply-jaguar/


      TICKETS & PRICES
      Participant prices are only valid if arriving in a Jaguar and taking part in the rally. They are not valid for those arriving on foot.

      Participants can make the most of our EARLY BIRD discount by booking before 28th February 2023.

      Children under 5 require a ticket, this can be booked online free of charge.

      Participant and visitor tickets will include entrance to the rest of the Beaulieu attraction, including the National Motor Museum, Palace House, Little Beaulieu, World of Top Gear, Beaulieu Abbey and its grounds and gardens.

      The best time for viewing the Simply rally is between 10am and 2pm.

       

       


      Adult


      Child




      Participants – Early Bird*


      £14.00


      £7.50




      Participants – Standard & On The Day


      £16.00


      £8.00




      Visitors


      Normal admission applies.


      Normal admission applies







      *Early bird tickets are available until 28th February 2023

      VEHICLE ENTRY
      Entry with your Jaguar is from 9am – 2pm. Please make sure you have your ticket printed or available on your phone, ready to be scanned on arrival.

      Please do not arrive early for our Simply rallies as no facilities will be open prior to 9:30am.

      Cars cannot leave and re-enter the grounds for the Simply rallies.

      ________________________________________________________________________________________________________________

      CLUB STAND ATTENDEE LIST

      We do ask for a final update on numbers 2 weeks prior to the event following which we will send out club labels to you via email for you to then distribute out to club members. Club members then need to print and display these in their windscreen on arrival. This helps us then park you all in your club area together.

      1. Trevor (admin)
      2.  Paj
      3.  
       
      • 5 replies
    • F-TYPE marks 75 years of Jaguar sports cars and its final model year update
      The Jaguar F-TYPE is the definitive Jaguar sports car from a rich bloodline spanning 75 years and including some of the most iconic models ever built
        • Like

×
×
  • Create New...



Forums


News


Membership