[ROVERNET - UK] RE: Irregular Final Drive Still???

Eric Russell p6rovers at yahoo.com
Thu Feb 21 06:47:39 GMT 2008


Too close to call for me at 60 mph on a busy highway.
Anyway, your 31.5 km/h works out at 19.573192548 mph.

So..........19.573192548 X 3 = 58.719576 mph at 3000
rpm.

I was just saying that my car appeared to be doing 60
mph at what appeared to be 3000 rpm.  Everything is
nicely perking at that speed.

Eric
***************************************

--- Netspace <vmitps at netspace.net.au> wrote:

> The book figure is 31.5km/h per 1000rpm in 4th.
> That is with standard tyres.
> 
> In my experience, with 175/75 it is about 31.
> 
> PVS
> 
> ----- Original Message ----- 
> From: "Steven Dibdin" <sdibdin at hotmail.com>
> To: <rovernet at lyris.ccdata.com>
> Sent: Thursday, February 21, 2008 12:09 AM
> Subject: RE: [ROVERNET - UK] RE: Irregular Final
> Drive Still???
> 
> 
> 
> I have had a similar problem with my TC. I timed the
> mile markers at 70mph a 
> couple years ago and it came out that the speedo was
> spot on (Who knew!). 
> But I do suspect that the tachometer is reading too
> fast. I know that the 
> diff' is the original one. Speed on speedometer
> matches reality. But 
> tachometer shows 4500 rpm @ 70 mph top gear.
> 
> I seem to remember Vern (?) mentioning that the
> ratio should be somewhere 
> near 3,100 rpm @ 70 mph. So I'm guessing my tacho is
> off. Question is: 
> Adrian, how did you calibrate your tacho? Could you
> share you method?
> 
> Cheers,
> 
> StevenD
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