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Old 22nd October 2009, 10:43   #1
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Angry Does your Maruti Swift speedo over-read?

My VDi is optimistic by about 7-8%

I got myself the Holux yesterday. I was aghast to see that its clearly having a +ve error!

I've noticed it consistently over almost 50+km, so want to know what others have felt. For the naysayers, fret not, a screen shot + pic will come by tomorrow.

I want to benchmark it this weekend against Punto, Palio and Vista.

@Architect/Anshuman: please to meetup boys! Any vista owner from gaon?
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Old 22nd October 2009, 10:53   #2
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Measurement with respect to my E71 GPS also showed a similar error.
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Old 22nd October 2009, 10:55   #3
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Hitanshu, so you expected zero error in your Swift speedo or is this way higher than what you thought it would be?

And why would you like to benchmark?
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Old 22nd October 2009, 11:24   #4
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Quote:
Originally Posted by phamilyman View Post
My VDi is optimistic by about 7-8%. I got myself the Holux yesterday. I was aghast to see that its clearly having a +ve error !
Since you haven't mentioned it explicitly can we presume that your VDi is still on stock tires ?
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Old 22nd October 2009, 11:27   #5
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Many cars' speedo over read. The error goes up as the speed increases. This is most pronounced in Marutis and Hyundais I think.

Once I noticed this when two of our cars going together at the same speed, Palio speedo read 80 Kmph while the Santro speedo read almost 90. (Communication through cell phone )

I noticed that my Punto's speedo also has a positive error, compared to Palio's.

Last edited by clevermax : 22nd October 2009 at 11:29.
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Old 22nd October 2009, 11:54   #6
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possibly all road going cars speedometers over or under-read.
many things can contribute - air-pressure in the tyres, temperature, road conditions, tyre size differences (up-sizing/downsizing), alloy wheels vs stock wheels,
state of maintenance of the bearings and a host of other such things.
I would say that the variance would normally be +/- 5%-7% at a conservative estimate.
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Old 22nd October 2009, 11:59   #7
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And as long as its on the positive side, why do you worry ?
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Old 22nd October 2009, 12:05   #8
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After upsizing my indica tires from 165 to 185 the speedo shows exact speed as my GPS.
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Old 22nd October 2009, 12:10   #9
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Even laura, superb accord also over read. I think these speedos are designed keeping in mind different tyre profiles and once the cars come to India we get super skinny tyres so they over read.
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Old 22nd October 2009, 12:10   #10
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Tau, I am surprised to see you surprised, didnt we have such discussion during the bike days? Did you expect it to be lower or absent?
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Old 22nd October 2009, 12:19   #11
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Quote:
Originally Posted by suman View Post
Hitanshu, so you expected zero error in your Swift speedo or is this way higher than what you thought it would be?

And why would you like to benchmark?
Because I can. . . because I'd like to know! And because at some level it reminds me that on this forum people earlier used to mention that palio MJD gets 16-17 or so only (except Bubby), while swift gets 19-20 easily.

If palio doesn't overread then that knowledge is useful.

Quote:
Originally Posted by clevermax View Post
Many cars' speedo over read. The error goes up as the speed increases. This is most pronounced in Marutis and Hyundais I think.

Once I noticed this when two of our cars going together at the same speed, Palio speedo read 80 Kmph while the Santro speedo read almost 90. (Communication through cell phone )

I noticed that my Punto's speedo also has a positive error, compared to Palio's.
ahh. Interesting.

Quote:
Originally Posted by shankar.balan View Post
possibly all road going cars speedometers over or under-read.
many things can contribute - air-pressure in the tyres, temperature, road conditions, tyre size differences (up-sizing/downsizing), alloy wheels vs stock wheels,
state of maintenance of the bearings and a host of other such things.
I would say that the variance would normally be +/- 5%-7% at a conservative estimate.
I knows. But my car is stock. And pressure was checked on Monday night (incl my own gauge)!

Quote:
Originally Posted by Eddy View Post
And as long as its on the positive side, why do you worry ?
Why not be aware?

Quote:
Originally Posted by cooldude1988765 View Post
Even laura, superb accord also over read. I think these speedos are designed keeping in mind different tyre profiles and once the cars come to India we get super skinny tyres so they over read.
I'm not sure of that.

@Techno: I am aware. I am just surprised that Maruti is taking the Bajaj way, not the Hero honda way.
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Old 22nd October 2009, 12:21   #12
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Speedo overread is present in all cars(5-7%)
However your FE readings will be incorrect if your odo overreads
For example Original Palio Odo under-read. Due to which people read FE as 1-2kmpl lower than what it actually was!
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Old 22nd October 2009, 12:21   #13
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It's the manufacturer's way of making you feel good.
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Old 22nd October 2009, 12:23   #14
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Yes, it does by around 5-10%.

Even my Hyundai Santro & i10 over read by around 5%.
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Old 22nd October 2009, 12:59   #15
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Quote:
Originally Posted by phamilyman View Post
Because I can. . . because I'd like to know! And because at some level it reminds me that on this forum people earlier used to mention that palio MJD gets 16-17 or so only (except Bubby), while swift gets 19-20 easily.
Hey Hitanshu... lets test it on my MJD, but not on weekend yaar.

I am game for it for today and tomorrow, today any time between now and 2100 hours, tomorrow any time between 0900 - 2100 hours.

Let me know.
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