Speedo under reading - Perth-WRX.com

adamh · #1 11-09-2007, 05:24 PM

Hey guys,

I now have different ratio gears and diff so my speedo under reads by about 10km an hour. Nick at ASG said the 2 options for adjusting it are taking the gear box appart and replacing something (I wont even consider that costly suggestion) or having the electronics adjusted somehow. Obviously the electronics options seems much preferable. Anyone know where I can get this done? Nick said there is somewhere in Osborne Park but couldnt remember the name.

Thanks,
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wild_rx · #2 11-09-2007, 05:25 PM

i wouldnt worry bout it!! its only 10kph!!!

Luigi · #3 11-09-2007, 05:35 PM

Just remember to go 70 in a 60 zone and 120 in a 110 zone easy fix.

Not sure of the name of the shop though

Chaddy · #4 11-09-2007, 07:13 PM

Heh... get a Stack cluster

But seriously this might have to be a dodge job by someone, playing with the speedo and hence tacho is kinda frowned on despite your good intentions. Just remember for now though that the difference wont be a straight 10km/hr, its a percentage and hence will vary according to your speed.

jEstEr? · #5 11-09-2007, 07:16 PM

another option is to buy a cheap gps device that shows your actual speed

97RA · #6 11-09-2007, 08:23 PM

Quote:

Originally Posted by adamh

I now have different ratio gears and diff so my speedo under reads by about 10km an hour.

One of the reasons I love my GC8 JDM cable drive setup

It's always spot on no matter what ratios I run.

You can get kits (Jaycar) for adjusting speedos (would I use one, dunno), or you can get a good gear calculation program from the web, punch in your ratios and drive by tacho (the tach will always be right) or you could consult the yellow pages for instrument service companies that fix speedos.

Smokey · #7 11-09-2007, 08:30 PM

option 3, get some new tyres with reduced rolling diameter (lower profile tyres)

WRX020 · #8 12-09-2007, 07:28 AM

Give AISAT Instruments a go.
They are in Welshpool, and specialise in instruments ect.
They should be able to help you.

Unit 4 1-9 Kurnall Road Welshpool
Western Australia
Phone +61 8 9350 5545
Fax +61 8 9451 4808
aisat@aisat.com.au

nauli · #9 12-09-2007, 07:32 AM

Quote:

Originally Posted by adamh

Hey guys,

I now have different ratio gears and diff so my speedo under reads by about 10km an hour. Nick at ASG said the 2 options for adjusting it are taking the gear box appart and replacing something (I wont even consider that costly suggestion) or having the electronics adjusted somehow. Obviously the electronics options seems much preferable. Anyone know where I can get this done? Nick said there is somewhere in Osborne Park but couldnt remember the name.

Thanks,
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MMS did an electronic adjustment on an MY99 with 6 speed etc some time ago. Perhaps give them a call 9249 7444

tuna · #10 12-09-2007, 08:18 AM

intrested to know if there are different part numbers on the vehicle wheel speed sensors?
ie a 3.9 box vs a 4.11 or 4.44