Quick Question

[nickperth]

Hey hows it going, i got a R33 GTS-T Series 2, i have a stock diff in this car and i would like to know if my revs are showing correctly on my spedo as when im doing 100ks an hour in my skyline it shows that im doing just under 3k in 5th gear is this correct as my SAFC doesnt show that it shows im doing roughly 2550-2600.

I aint sure who i should trust.

Yours Truly,

Nick

[blind_elk]

I would trust the SAFC - it's digital, your tacho is analog.

But really, the tacho is basically for information, it is not necessarily definitive.

[SargeRX8]

There are a heap of online calculators online which can tell you how much rpm you are doing at x speed. I'll see if I can calculate the rpm for 100km in 5th

According to this calculator in an R33 GTST with the standard 4.1 rear diff ratio, you would be doing just above 2500rpm at 100km/h. Your SAFC and dash read from the same signal, the digital is always better as it doesn't just go out of whack like the mechanical gauge would.

You shouldn't notice this just in 5th. All your gears and speeds are gonna be out. Get your cluster checked or replaced. Ive got a spare R33 GTST cluster with 118xxxkm on it. Works a treat and if you're in Sydney its yours for cheap.

Edited April 12, 2011 by SargeRX8

[nickperth]

Is there anyway to refurbish a tachometer as i dont want to really change the k's its done.

[Spurdo]

Is there anyway to refurbish a tachometer as i dont want to really change the k's its done.

yea it can be fixed, its just a matter of finding someone capable of doing it as its a fairly tricky little precision instrument. alternatively if you obtain another tacho you can always get the mileage changed on it. this would be done by the same person who would repair them. when your asking around about it, make it clear that your not trying to wind back an odometer illegitimately. you've just bought a replacement for your car and want it to reflect your car's true mileage.

i've been through the same thing before, i found a guy that ran a small business fixing precision electronics like these and he got really suspicious when i asked him if he could change the odometer on the new tacho i'd bought, took a little convincing that it was legit lol.

[SargeRX8]

Or you can always just swap the speedo module out of your one into a new one because as you've stated, its your rev tacho which is out. Its fiddly work but you can also rewind it your self.

[nickperth]

Alright thanks guys, ill have a look into it, i might get a new tacho but probs going to get one of the 320km/h ones which ive been wanting to get.

[SargeRX8]

Lol thats pointless then. If you get a new tacho, its going to have to be recalibrated as out of the box, those 320km/h ones might not be calibrated for your car...

[nickperth]

I was planning on getting a nismo one which ive read are calibrated for the gts-t's