Thread: AUTO TRANS PROBLEM

Hi Blokes,
I thought I might add something here to the fuel economy issue and I'm probably preaching to the already converted here, but a year or so back I fitted 245 70R16 tyres to "VILET" (1986 RRC) but found that the fuel consumption went up dramatically.
The reason for this was that the tyres were 730mm in diameter and the standard recommended tyres were 700mm, which then makes the odometer reading wrong.
I then compared the odometer reading with the Kilometers actually travelled and found that in my case the odometer was reading 12% less than what had actually been travelled, so this had to be calculated into the economy figures when working off the odometer reading thus making a big but positive difference to the economy figures.
Ok I'll get off now.

Originally Posted by Patrick M

Hi Blokes,
I thought I might add something here to the fuel economy issue and I'm probably preaching to the already converted here, but a year or so back I fitted 245 70R16 tyres to "VILET" (1986 RRC) but found that the fuel consumption went up dramatically.
The reason for this was that the tyres were 730mm in diameter and the standard recommended tyres were 700mm, which then makes the odometer reading wrong.
I then compared the odometer reading with the Kilometers actually travelled and found that in my case the odometer was reading 12% less than what had actually been travelled, so this had to be calculated into the economy figures when working off the odometer reading thus making a big but positive difference to the economy figures.
Ok I'll get off now.

There is a solution for this - speedohealer. SpeedoHealer v4 speedo and odo calibrator by HealTech Electronics Ltd.

They are a speed sensor correction device.

v4 is for hall sensors. They also do a 2-wire VR sensor version.

I have it in my 300 coupe and the RRC. Best bit is the speedo is absolutely dead accurate because you callibrate it with high-speed gps. Or you can deliberately program a "safety margin" in once you have worked out the correction factor, so that your 105 is actually 100 - just in case your speedo has been so far out of whack for years you cannot get used to an accurate one.

Originally Posted by Mercguy

There is a solution for this - speedohealer. SpeedoHealer v4 speedo and odo calibrator by HealTech Electronics Ltd.

They are a speed sensor correction device.

v4 is for hall sensors. They also do a 2-wire VR sensor version.

I have it in my 300 coupe and the RRC. Best bit is the speedo is absolutely dead accurate because you callibrate it with high-speed gps. Or you can deliberately program a "safety margin" in once you have worked out the correction factor, so that your 105 is actually 100 - just in case your speedo has been so far out of whack for years you cannot get used to an accurate one.

That is interesting. I tend to just check the speedo with my phone (gps). Most of them are quite close. The modern ****boxes are often understated by upto 5km/h at 60km/h. I have the most issues with my old cars wth mph speedo. Do you think I can remember what odd speeds like 40km/h, 50km/h and 80km/h are in mph....

seeya,
Shane L.

Just keep in mind it's illegal for the speedo to read less than the actual speed and it makes your vehicle technically unroadworthy, which could affect your insurance if you crash and assessor uses it as an excuse to reject your claim.

On fuel economy, the figures mentioned scare me, as my Puma Defender only uses 11 l/100 kms when towing our camper.

Originally Posted by DiscoMick

Just keep in mind it's illegal for the speedo to read less than the actual speed and it makes your vehicle technically unroadworthy, which could affect your insurance if you crash and assessor uses it as an excuse to reject your claim.

On fuel economy, the figures mentioned scare me, as my Puma Defender only uses 11 l/100 kms when towing our camper.

the ****box here uses easily 35L/100kms towing the block of flats. Most petrol 4wds made in the last 50years will return similar economy sadly (they just don't tend to talk about it like land rover owners do).

Originally Posted by Mercguy

There is a solution for this - speedohealer. SpeedoHealer v4 speedo and odo calibrator by HealTech Electronics Ltd.

They are a speed sensor correction device.

v4 is for hall sensors. They also do a 2-wire VR sensor version.

I have it in my 300 coupe and the RRC. Best bit is the speedo is absolutely dead accurate because you callibrate it with high-speed gps. Or you can deliberately program a "safety margin" in once you have worked out the correction factor, so that your 105 is actually 100 - just in case your speedo has been so far out of whack for years you cannot get used to an accurate one.

$134.10 - bugger, I've just spent $206 ordering a C6100 speedo adapter for my RRC. Oh well at least I know they work as I have one in the D2.