speedo quaries

[atang]

I just bought a Supra TT, the garage had converted the speedo to MPH, well, it used to have a face like 110mph outside & 180kph inside, now it has just 180mph on the clock, but it's seem traveling faster then what its said, like the clock said 85mph, I ran my brother on the other car, his read 80mph, I put my food down my supra went to 130, god knows how fast I really traveling.

 

front: 225/50/16 back: 245/50/16

 

Can anyone help with this.

 

Many thanks.

 

Andrew.

[lust2luv]

Originally posted by atang

I put my food down my supra went to 130, god knows how fast I really traveling.

 

Very wise, you really shouldn't be eating at the wheel at those speeds.

 

[Piran]

When I got my supra the needle had been placed incorrectly when the garage replaced the speedo dial - we did some testing with my wife in the other car and it turned out to be 10mph out across the range - so if your speedo is out by the same amount at all speeds then it sounds like the needle has been put on incorrectly

[Gaz Walker]

Originally posted by lust2luv

Very wise, you really shouldn't be eating at the wheel at those speeds.

 

 

 

Gaz.

[atang]

seriously, how did you sort it out?

 

thanks.

[Piran]

my car came with a 110mph dial so I waited till I got my TRL DSC and a new set of dials and prised the needle off with a couple of teaspoons - then had to do several runs to get the placing correct (it worked out that at rest with the engine running the speedo read around -15mph) - of course this wasn't really accurate - to do that you need to take it to a rolling road and do the callibration there.