R33 Speedo Difference

[skyline_freak_r33]

Hi,

I was meaning to do an R33 non turbo speeod conversion to a turbo one

Mainly due to the lower km's my car has

I ended up buying one and tried putting it in yesterday

All went well but didnt get a chance to drive it

Today i took it for a drive but to my surprise the speedo was out of wack

It was showing roughly double the speed on the speedo than what i was going

my fuel, rpm, oil temp etc were all fine but the speed is out

Would this be caused by the speed sender on my gearbox being different to a turbo one?? How could it be a huge amount out? Aren't the speedo's the same? i also bought a series 1 dash which is the same as my car

cheers

[skyline_freak_r33]

Anyone got any idea to what it could be?

cheers

[jawrgy]

Drive at half the speed of ur speedo

[Carbon 34]

more then likely the sending unit on a non turbo is picking up the signal at a slower pace.

if you put a occiloscope / digital multimeter on the sender wires or OBD tool you can see if the on off pulse is the same as a Non turbo.

check the shop manual to see if it matches, doubt it

check the sender part numbers , bet there different ????

hope that helps. does that mean you can drive twice as fast legally..hahahaha

I'm sure there is a way to fix without spending a heap of dosh

Edited November 4, 2010 by sapphiregraphics

[dark.sky]

I have a RB25DET speedo sender here. $30.

Ive got the RB25 box in my R32, but using a mechanical speedo sender, mine is out at an increasing rate.

Indicated 60kmh = 56kmh GPS

Indicated 110kmh = 100kmh GPS

My speedo and GPS used to be within 1kmh of each other.

[rs4StageaTrav]

I have a RB25DET speedo sender here. $30.

Ive got the RB25 box in my R32, but using a mechanical speedo sender, mine is out at an increasing rate.

Indicated 60kmh = 56kmh GPS

Indicated 110kmh = 100kmh GPS.

Hi , I was driving towards a police speed check station at 60kmh on speedo but the police checker read 56kmh also at highway speeds I have been overtaken by grannies

My speedo and GPS used to be within 1kmh of each other.