speed variances

robsta · Post by **robsta** » Mon Jul 30, 2007 4:01 pm

I have an Apexi RSM in my car and it reads different to the speedo. Just wondering what one would be reading correctly?

mr-charisma · Post by **mr-charisma** » Mon Jul 30, 2007 5:36 pm

whichever is slowest

Post by **BorepYano** » Tue Jul 31, 2007 11:44 am

lol

well i guess if u set the settings on the RSM right then that would be the right one

jonowong · Post by **jonowong** » Tue Jul 31, 2007 11:51 am

BorepYano wrote:lol

well i guess if u set the settings on the RSM right then that would be the right one

what makes you say that

Post by **BorepYano** » Tue Jul 31, 2007 12:09 pm

jonowong wrote:
BorepYano wrote:lol

well i guess if u set the settings on the RSM right then that would be the right one
what makes you say that

because i'm special lol
it is a rev and SPEED meter after all lol

FtoSam · Post by **FtoSam** » Tue Jul 31, 2007 12:13 pm

Wouldve thought they both read from the same meter.

Id say stocko because its usually configured to your car. And is set from the factory to read the ECU's speed precisely...

Id also say the RSM cause its digital as apposed to an anologue dial...

How much is the difference??

I bought a GPS system... Totally independant readings (from satelites as opposed to sensor)... Give 1km/h variance to the stocko speedo.

Post by **BorepYano** » Tue Jul 31, 2007 12:20 pm

by settings i mean the settings on his RSM for tyre size etc... cos your speedo is set for the stock tyre and rim size.
and also i've yet to see a car that has a speed that's spot on even with stocko everything...

robsta · Post by **robsta** » Tue Jul 31, 2007 12:24 pm

i have 215/45r17 tyres. when I'm doing 100km as per the RSM, the stock speedo says about 108-110km

Post by **BorepYano** » Tue Jul 31, 2007 12:26 pm

well... that throws my theory out the window lol
the difference shouldnt be that much and the speedo should say slower if u have larger wheel diametres
well... i'm still special lol

jonowong · Post by **jonowong** » Tue Jul 31, 2007 12:33 pm

FtoSam wrote:
Id also say the RSM cause its digital as apposed to an anologue dial...

thats not really a valid reason, thats like saying my digital clock reads the correct time because its digital! and my anologue clock shows the incorrect time because its old school

Post by **Bennoz** » Tue Jul 31, 2007 12:41 pm

The stock speedo will always read 5% over. Thats the case on most Jap cars.

khunjeng · Post by **khunjeng** » Tue Jul 31, 2007 1:32 pm

My RSM alwasy reads about 2kmph below my speedo

My AVCR is the same...

My SAFC did the same....

FtoSam · Post by **FtoSam** » Tue Jul 31, 2007 2:30 pm

jonowong wrote:
FtoSam wrote:
Id also say the RSM cause its digital as apposed to an anologue dial...
thats not really a valid reason, thats like saying my digital clock reads the correct time because its digital! and my anologue clock shows the incorrect time because its old school

My reasoning behind that is that digital is constant. it will read exactly what the sensor tells it..

An analogue could have so many more things affect it.

However i doubt it would cause 8kmh difference..

So ben... All jap cars usually come with a 5% difference?? strange.... dammit... now im gonna take it into account when driving... lol

Post by **Bennoz** » Tue Jul 31, 2007 2:53 pm

FtoSam wrote: So ben... All jap cars usually come with a 5% difference?? strange.... dammit... now im gonna take it into account when driving... lol

Mate, you've got 18's on, yours could be reading anything lol

FtoSam · Post by **FtoSam** » Tue Jul 31, 2007 3:04 pm

Bennoz wrote:
FtoSam wrote: So ben... All jap cars usually come with a 5% difference?? strange.... dammit... now im gonna take it into account when driving... lol
Mate, you've got 18's on, yours could be reading anything lol

hrmm.... farkin cars... im so selling the fto and buying a horse...

robsta · Post by **robsta** » Tue Jul 31, 2007 3:09 pm

FtoSam wrote:
Bennoz wrote:
FtoSam wrote: So ben... All jap cars usually come with a 5% difference?? strange.... dammit... now im gonna take it into account when driving... lol
Mate, you've got 18's on, yours could be reading anything lol

hrmm.... farkin cars... im so selling the fto and buying a horse...

they wont read anything at all...they have no speedo, you'll never know how fast your going

Post by **Bennoz** » Tue Jul 31, 2007 3:13 pm

robsta wrote:
FtoSam wrote:
Bennoz wrote:
FtoSam wrote: So ben... All jap cars usually come with a 5% difference?? strange.... dammit... now im gonna take it into account when driving... lol
Mate, you've got 18's on, yours could be reading anything lol

hrmm.... farkin cars... im so selling the fto and buying a horse...
they wont read anything at all...they have no speedo, you'll never know how fast your going

But at least he'll know how much horsepower he's got! Save a fortune on Dynos lol

Richy · Post by **Richy** » Tue Jul 31, 2007 3:41 pm

they wont read anything at all...they have no speedo, you'll never know how fast your going Confused Confused Confused

use the gps for satelite reading..

khunjeng · Post by **khunjeng** » Tue Jul 31, 2007 4:32 pm

over head radar speed check I went through agreed 100% with me AVCR my AVCR and RSM which I have in the same car.

JOeJOe · Post by **JOeJOe** » Tue Jul 31, 2007 4:35 pm

khunjeng wrote:over head radar speed check I went through agreed 100% with me AVCR my AVCR and RSM which I have in the same car.

Are there any in NSW, the over head radars? I've seen a few in melbourne while I was down there but not in NSW.