Rev counter readings
 

Hello. I have got a 1968 1800S. Can anyone tell me what the rev counter should be reading at different speeds? For instance, what it should be reading at 60mph in 4th gear with overdrive engaged?
I have just had mine re-calibrated for electronic points and want to make sure it is now reading accurately. Thanks.

There are several online calculators that will work this out for you if you plug in the tyre size, differential final drive ratio and gearbox ratios (4th gear will be 1:1) but this still isn't going to be as accurate as using a multimeter (with the given function) and /or a strobe light (also with the given function)

Thanks for that.
Meanwhile I have had a private message from Volvonic272 but, ridiculously, I am apparently unable to reply to it until I have made 30 posts. So can I ask Volvonic272 (Dave) to call me on 07810 655646 sometime tomorrow? Thanks!

The 30 post rule is madness.

RIDDLERS55,
These might help,
15.9 mph per 100 rpm in 4th
21.1 mph per 1000rmp in overdrive top gear
Source: Autocar July 1966 1800S Test

Phil

XC90 - no it isn't madness: it keeps those merely wanting free advertising away. Join the club and build up your posts then you can do what you like (within limits!).

P

Early and late setups, using:

--D-OD (.756) and 4.56 rear (B18-'68)

OR

--J-OD (.797) with 4.30 rear (B20 '68-)

both resulted in ~19-21 mph/1000rpm in OD, depending on tire circumference...

Or they can go to the 'up your post count'.

If people want to advertise Volvos vehicles or parts they should be able to on a Volvo forum.

I think its a silly rule but we dont have to agree.

You can of course, sell your car or parts through the forum, you just have to establish yourself first. The 30 post rule, I think 20 would be more sensible, was brought in after lots of people were just joining so they could get targeted but free advertising, and never to be seen until they wanted to do it again, if ever. Dealers were also coming in and grabbing nice cars that were advertised at a nice price and were reselling them for a big mark up. That's difficult to stop but there were quite a few Amazons that were bought off the forum and appeared very quickly on dealer sites, often via eBay. Buyer beware, seller takes care, it depends which one you are.

If I have the chance to give mine a spin this weekend, I will make a note of the rev counter at 60 in O/D and let you know what the result is.