What Does Your Rev Counter Read at 70MPH?

[whippet]

Yeah Whippet is quite right to say that the tyre size is irrelevant....

Cheers, Elvz... I have printed your reply and will take it and show my wife... just to prove I am right some of the time!!!

[Linda]

3.0 auto. 31x10.50x15. I know my speedo reads about 5mph slower than I'm going, so speedo at 65 (ie. going 70ish) 2000, speedo at 75 (going 80ish) 2500.

Not sure I get the tyre size makes no difference bit??? Does that also include tyre type? I definately noticed that when we put 31" M/T's on the 2.4 it had to rev harder to maintain the same speed (it had 265 road tyres on before). Cant count its revs for you tho as the 35" boggers are on it so I cant turn it to get it off the drive!!!

[Guest]

3.0 auto. 31x10.50x15. I know my speedo reads about 5mph slower than I'm going, so speedo at 65 (ie. going 70ish) 2000, speedo at 75 (going 80ish) 2500.

Not sure I get the tyre size makes no difference bit??? Does that also include tyre type? I definately noticed that when we put 31" M/T's on the 2.4 it had to rev harder to maintain the same speed (it had 265 road tyres on before). Cant count its revs for you tho as the 35" boggers are on it so I cant turn it to get it off the drive!!!

Since I put on the 31s my speedo is more accurate, it used to be about 10% out, it's now 5% out.

Cheers

[SurfnTurf]

Does Overdrive-O/D just mean the turbo?

Cheers,
Nick.

[da SLUG man]

Does Overdrive-O/D just mean the turbo?

Cheers,
Nick.

no, it means overdrive...

[kitesurf_phil]

Does Overdrive-O/D just mean the turbo?

Cheers,
Nick.

The overdrive button (if fitted) is on the right side of the main shift on the auto,s. It brings in an extra higher gear for cruising.

[marky]

3500 rpm on 31x10.5x15 tyres = 90mph

[vanman]

tyre size?

surely the tyre size is irrelevent.
the surf only calculates speed by revs in relevent gears.
if you change the tyre size,your actual speed changes
but unless you recalibrate your speedo your indicated speed dont.
jack all wheels up off ground and try it.
with or without wheels and tyres.
i think!

[TonyN]

This thread is misleading, revs and speedo readings won't change with different size tyres. Actual road speed will change though, but this isn't shown up on the speedo.

If your getting more Revs per MPH as read on the speedo, your clutch is slipping.

[slim]

so it looks like theres only me and craiglux that have 3500 at 70 mph i feel left out so any ideas why that is any1, could it be that it is suppose to be like that.

cant remember it being any diffrent but then again not had it that long.

oh well sure something will show its ugly head sooner or later.

iam off to bed got a long drive to sunny newcastle tomorrow

sees ya all later

[Ace Piker]

My Revs

At 2500 revs I'm doing 83mph, at 3000 I'm up to 102! (not that I have driven that fast you understand). Is my speedo wildly out or something?

[andy]

At 2500 revs I'm doing 83mph, at 3000 I'm up to 102! (not that I have driven that fast you understand). Is my speedo wildly out or something?

Sounds about right for a 3rd gen, see my previous posting.

[Rob]

2300rpm at 70 for me.

[RobD]

2600@ 70mph for me,maybe because mines is manual transmission?

[Malenibo]

I am the same as Rob. 2300 revs at 70MPH. Although I have a suspision that mine is reading between 7 to 12 MPH higher than I am moving.

96 3.0 TD SSRG