Singapore Nissan Owners Group

Nissan Car Lounge - Almera, Juke, Latio, Qashqai, Sylphy, Teana Owners => Latio => Topic started by: clarence on August 01, 2008, 09:39:48 AM

Title: Tachometer Reading at Cruising Speed
Post by: clarence on August 01, 2008, 09:39:48 AM
My tachometer reading is as follows at cruising speed.

80km/h - 2000rpm
90km/h - 2200 rpm
100km/h - 2400rpm

Some forumers claimed that their tachometer reads 2000rpm at 100km/h.

What is your reading tachometer reading at the above speeds?

*Note : Each small mark, ie. " - "  above the 2000rpm mark represents 200rpm.
Title: Re: Tachometer Reading at Cruising Speed
Post by: CustomGolf on August 01, 2008, 09:49:39 AM
CVT and 4AT have different Tacho Reading so son't worry about it, your's will be common to that of the 4AT Gear Box
Title: Re: Tachometer Reading at Cruising Speed
Post by: infinityx on August 01, 2008, 10:03:27 AM
Yap, Jef is correct. For 4AT gearbox, the rpm is higher than CVT gearbox. That's why some forumers claimed that their tachometer reads 2000rpm at 100km/h is correct for CVT.
Title: Re: Tachometer Reading at Cruising Speed
Post by: ahhoe on August 01, 2008, 10:13:56 AM
My tachometer reading is as follows at cruising speed.

80km/h - 2000rpm
90km/h - 2200 rpm
100km/h - 2400rpm

Some forumers claimed that their tachometer reads 2000rpm at 100km/h.

What is your reading tachometer reading at the above speeds?

*Note : Each small mark, ie. " - "  above the 2000rpm mark represents 200rpm.

am on 4A/T, the rpm is correct.
Title: Re: Tachometer Reading at Cruising Speed
Post by: erzat on August 01, 2008, 10:52:38 AM
Bro,

mine's a 4AT too..
so 100km/hr will be ard 2400rpm..

 :thumbsup: :thumbsup: :thumbsup:
Title: Re: Tachometer Reading at Cruising Speed
Post by: xuan511 on August 01, 2008, 11:57:06 AM
Bro,

mine's a 4AT too..
so 100km/hr will be ard 2400rpm..

 :thumbsup: :thumbsup: :thumbsup:

same same =)
Title: Re: Tachometer Reading at Cruising Speed
Post by: alangohek on August 01, 2008, 02:24:54 PM
Hi,

I think the tachometer reading depends on the gradient of the road that you are driving and how fast you push the car to achieve that speed.

On a flat road, if i drive gently and let the speed increase, I can achieve 100 kmh at 2000 rpm.

Title: Re: Tachometer Reading at Cruising Speed
Post by: clarence on August 01, 2008, 03:29:28 PM
You mean you managed to cruise on a flat road at at 100km/h at only 2000rpm on your Latio 4A/T?   :w00t:

How did you do that?  :confused1:

No matter how I tried, no matter how gently I stepped on my accelerator, my rpm still showed 2400rpm at 100km/h
Title: Re: Tachometer Reading at Cruising Speed
Post by: corgan on August 01, 2008, 03:35:59 PM
the readings are right for the speeds you mentioned. For 4A/T only though. I add one more

at 120km/h, abt 2.8-2.9k rpm.
Title: Re: Tachometer Reading at Cruising Speed
Post by: FamilyManz on August 01, 2008, 03:59:00 PM
On a flat road, if i drive gently and let the speed increase, I can achieve 100 kmh at 2000 rpm.



4AT??? Impossible..... even if u let go of the accelerator....
Title: Re: Tachometer Reading at Cruising Speed
Post by: clarence on August 01, 2008, 04:47:28 PM
the readings are right for the speeds you mentioned. For 4A/T only though. I add one more

at 120km/h, abt 2.8-2.9k rpm.

I noticed that at speeds above 80km/h for Latio 4A/T on overdrive, the tachometer increases 200rpm for every 10km/h gain in speed.
Title: Re: Tachometer Reading at Cruising Speed
Post by: CustomGolf on August 01, 2008, 08:52:56 PM
4AT??? Impossible..... even if u let go of the accelerator....

His ride is CVT lah. Never check frequency before using radio how to get 93.3 programe at 95.0FM :D
Title: Re: Tachometer Reading at Cruising Speed
Post by: Anaconda on August 01, 2008, 10:43:25 PM
Mine CVT, 100km/hr at 2200rpm leh, 90km/hr at 2000 rpm.  How lightly i press accelerator also, the readings remain as such.  My CVT different ratio arr ?  Mine is Oct 2005 model.  Maybe later models different ? :confused1: :confused1: :confused1:
Title: Re: Tachometer Reading at Cruising Speed
Post by: FamilyManz on August 01, 2008, 11:07:57 PM
His ride is CVT lah. Never check frequency before using radio how to get 93.3 programe at 95.0FM :D

izzit.... his mini info state sedan base model leh :confused1:

nowadays base model all CVT meh :bleh:
Title: Re: Tachometer Reading at Cruising Speed
Post by: Jazz on August 01, 2008, 11:24:24 PM
Guys, pls do not neglect your rim size and tire profile, all these affect the speed and revolution.  :smile:
Title: Re: Tachometer Reading at Cruising Speed
Post by: a40x on August 03, 2008, 07:42:58 AM
For mine at 80km/h at 2000rpm, 90km/h at 2100rpm, 100km/h at 2200rpm. Driving AT.
Title: Re: Tachometer Reading at Cruising Speed
Post by: clarence on August 03, 2008, 10:38:29 AM
I am driving Latio 4A/T on stock 185/65R15 tyres, and my rpm is as follows -

80km/h - 2000rpm
90km/h - 2200 rpm
100km/h - 2400rpm

Those of you driving Latio 4A/T whose cruising rpm differs from mine, did you upgrade your tyres and/or rims?
Title: Re: Tachometer Reading at Cruising Speed
Post by: CustomGolf on August 03, 2008, 10:55:46 AM
izzit.... his mini info state sedan base model leh :confused1:

nowadays base model all CVT meh :bleh:

Didn't look at his mini info, but I'ld like to see his RPM at 100kmh if it's a 4AT.
Title: Re: Tachometer Reading at Cruising Speed
Post by: CustomGolf on August 03, 2008, 11:01:56 AM
Guys, pls do not neglect your rim size and tire profile, all these affect the speed and revolution.  :smile:

Nope, I don't think there will be a difference in READING the speed on you meter dial when you up your tyre size, it's still based on your standard tyre size unless your car is so futuristic that speed is not measured using parameters preset in the ECU or based on your wheel rotation speed but an external source or you've re-calibrated your meter after changing wheels.

I'm using 205/55/16 and my rpm is still at 2400 when I'm travelling at 100kmh.
Title: Re: Tachometer Reading at Cruising Speed
Post by: FamilyManz on August 03, 2008, 11:04:36 AM
Didn't look at his mini info, but I'ld like to see his RPM at 100kmh if it's a 4AT.

me too(https://www.sgnissan.com/forum/proxy.php?request=http%3A%2F%2Fidobaby.com%2Fforum%2Fstyle_emoticons%2Fdefault%2Fph34r.gif&hash=87eaf4535742e8604f6f97d89601167452f2f8eb)
Title: Re: Tachometer Reading at Cruising Speed
Post by: CustomGolf on August 03, 2008, 11:07:37 AM
For mine at 80km/h at 2000rpm, 90km/h at 2100rpm, 100km/h at 2200rpm. Driving AT.

You sure bro, your meter dial is 200rpm per mark so at 100kmh it should be 2 marks above 2k so it should be 2.4K rpm. Unless you're saying your meter dial is just 1 mark above 2k when you're at 100kmh.
Title: Re: Tachometer Reading at Cruising Speed
Post by: clarence on August 03, 2008, 11:56:11 AM
Perhaps he upgraded his rims and tyres to a wrong size and hence his speedometer is giving an incurrate reading - slower reading than actual speed.
Title: Re: Tachometer Reading at Cruising Speed
Post by: Jazz on August 03, 2008, 12:24:35 PM
Nope, I don't think there will be a difference in READING the speed on you meter dial when you up your tyre size, it's still based on your standard tyre size unless your car is so futuristic that speed is not measured using parameters preset in the ECU or based on your wheel rotation speed but an external source or you've re-calibrated your meter after changing wheels.

I'm using 205/55/16 and my rpm is still at 2400 when I'm travelling at 100kmh.

Google and read about the tire profile size do affect speedometer reading. The ECU unable to re-calibrate to the new rim size and tire profile for your info. Bear in mind that our speedometer is analog, not accurate to gauge or judge the actual speed or RPM.

Lastly your speedometer reading with 205/55/16 is 1.67% slower compared to your stock size
Title: Re: Tachometer Reading at Cruising Speed
Post by: CustomGolf on August 03, 2008, 01:35:48 PM
Google and read about the tire profile size do affect speedometer reading. The ECU unable to re-calibrate to the new rim size and tire profile for your info. Bear in mind that our speedometer is analog, not accurate to gauge or judge the actual speed or RPM.

Lastly your speedometer reading with 205/55/16 is 1.67% slower compared to your stock size

That is precisely what I'm trying to explain, it shows 100kmh and tacho is 2.4k rpm, I'm going above 100kmh but it's not registered. It just don't show up in your meter dial so it should show the same no matter what tyres you're on. Those 2 figures are constant no matter what rims and tyres you're on unless you go calibrate. So where did the variance come from if every one is using the same gear box ratio and same calculation of tyre circumference.
Title: Re: Tachometer Reading at Cruising Speed
Post by: clarence on August 03, 2008, 02:03:42 PM
Use the link below to gauge if your tyre and rim upgrade is of the correct size.

If the size is incorrect, you are likely to get incorrect speedometer reading.

http://www.miata.net/garage/tirecalc.html
Title: Re: Tachometer Reading at Cruising Speed
Post by: FamilyManz on August 03, 2008, 03:50:11 PM
That is precisely what I'm trying to explain, it shows 100kmh and tacho is 2.4k rpm, I'm going above 100kmh but it's not registered. It just don't show up in your meter dial so it should show the same no matter what tyres you're on. Those 2 figures are constant no matter what rims and tyres you're on unless you go calibrate. So where did the variance come from if every one is using the same gear box ratio and same calculation of tyre circumference.

 :smile: thats is the reason why I always advise my associates when they change their sizes over the 2% mark, against stock.....

the actual speed will not be reflected on the meter.
Title: Re: Tachometer Reading at Cruising Speed
Post by: alangohek on August 04, 2008, 03:14:51 PM
4AT??? Impossible..... even if u let go of the accelerator....

I manage to get 2000rpm at 100kmh cruising on a flat load without passenger and empty boot. Petrol I am using is either Caltex RON 98, Shell RON 98 or Vpower. Stock rim and tyre.

May be because my car still less than 3 months old.

Haha

Rgds

Title: Re: Tachometer Reading at Cruising Speed
Post by: CustomGolf on August 04, 2008, 07:15:40 PM
Use the link below to gauge if your tyre and rim upgrade is of the correct size.

If the size is incorrect, you are likely to get incorrect speedometer reading.

http://www.miata.net/garage/tirecalc.html

Brother follow the link http://forum.thelatioclub.org/index.php?topic=364.0, we're not talking about incorrect speedo reading in the thread here but the relation between speedo reading and RPM reading.
Title: Re: Tachometer Reading at Cruising Speed
Post by: clarence on August 04, 2008, 08:34:54 PM
An incorrect speedo reading will affect your rpm reading too.

For example, if because of your incorrect upgraded tyre size, your speedo reading is faster than the actual speed by 3%.

Hence, when your speedo shows 100km/h, you are actually travelling at only 97km/h.
Title: Re: Tachometer Reading at Cruising Speed
Post by: Jazz on August 04, 2008, 10:13:25 PM
An incorrect speedo reading will affect your rpm reading too.

For example, if because of your incorrect upgraded tyre size, your speedo reading is faster than the actual speed by 3%.

Hence, when your speedo shows 100km/h, you are actually travelling at only 97km/h.

Spot on.  :D
Title: Re: Tachometer Reading at Cruising Speed
Post by: idiotboi89 on August 04, 2008, 10:49:57 PM
I manage to get 2000rpm at 100kmh cruising on a flat load without passenger and empty boot. Petrol I am using is either Caltex RON 98, Shell RON 98 or Vpower. Stock rim and tyre.

May be because my car still less than 3 months old.

Haha

Rgds



wah lao.. den my 4at sounds to love to rev abit more den  :crying:
Title: Re: Tachometer Reading at Cruising Speed
Post by: baobao on August 06, 2008, 07:50:17 AM
yo.. does it mean our 4AT drink more petrol than the CVT version? is the diff in FC big?  :blink: