Mph at rpm?

[big_treacle]

Hi all,
My speedo is playing up and I gotta drive home from work later. Can anyone give me some numbers for rpm in a given gear so I don't get clocked on the speed cameras? i.e. 30mph is xRPM in 2nd...

Cheers

[Alexdaredevilz]

Sat nav?

Or you can get very good apps now with speedos

[dbv8]

Or follow the right car.

BMW 5 series, steady 77 mph in the fast lane whether the 2nd lane is free or not.

Lady driver, steady 68 in the middle lane whether the first lane is free or not.

Battered Peugeot diesel estate, trying to maintain 99 in whatever lane is available.... oops that will be me then

[LooneyTunes]

No idea what size wheels/tyres you've got, but in the absence of a direct answer, does this help?

Car speed calculator


From the Cerb manual online:
LSD 3.45

1st 2.95
2nd 1.95
3rd 1.34
4th 1
5th 0.73

Bang in your tyre size, set max rpm to 1000, and it should output KM/1000 rpm for each gear. Multiply through by 0.62137 to get MPH.

[big_treacle]

LooneyTunes said:

No idea what size wheels/tyres you've got, but in the absence of a direct answer, does this help?

Car speed calculator


From the Cerb manual online:
LSD 3.45

1st 2.95
2nd 1.95
3rd 1.34
4th 1
5th 0.73

Bang in your tyre size, set max rpm to 1000, and it should output KM/1000 rpm for each gear. Multiply through by 0.62137 to get MPH.

Cheers! i get 3000rpm for 30mph in 2nd roughly. Sounds about right to me. I'll try and stick behind someone else, but knowing sods law I'll just end up with noone to follow!

[spongy]

8000 revs=195 mph in 5th

[fatjon]

1800 is 30 in 3rd

yup, my speedo packed in for a while..

[gruffalo]

fatjon said:

1800 is 30 in 3rd

yup, my speedo packed in for a while..

Packed in for a while?

Does that mean it fixed itself as these cars seem to sometimes?

[fatjon]

not this time, hand in pocket for a new sensor

[Gazzab]

7000 in 1st is 60 mph I think but I have a different set up.