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> RPM reading @ 110km/h, survey

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popnyat
post Aug 1 2008, 11:09 AM

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user posted image

got bike only... hehe..

110km/h 6.3k rpm... thumbup.gif thumbup.gif

This post has been edited by popnyat: Aug 1 2008, 11:12 AM
nimrod2
post Aug 1 2008, 11:19 AM

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QUOTE(Traveler @ Aug 1 2008, 11:01 AM)
That's true. A 2.5L 325i revs around 2k rpm at 110km/h IIRC.
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haha i'm so clever blush.gif blush.gif

QUOTE(popnyat @ Aug 1 2008, 11:09 AM)
got bike only... hehe..
110km/h 6.3k rpm...  thumbup.gif  thumbup.gif
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not bad dude. but 110km/h on a bike?
dangerous.
Rusty Nail
post Aug 1 2008, 11:20 AM

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QUOTE(peris @ Aug 1 2008, 10:34 AM)
is't..lol..my satria using 16' rims...so how i wanna know how fast i drive then?
i'm a good citizen..dun wan to be caught by police  tongue.gif
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i think rims is not an issue (unless you take weight into account) but the tire radius.
http://swatt.j.porter.name/tech-center/tool/tire-calculator
compare your stock tire with the new ones that you are using. then you can see the difference in size.
LeVis_Jeans
post Aug 1 2008, 11:20 AM

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QUOTE(nimrod2 @ Aug 1 2008, 10:45 AM)
i think its more like urban legend.

haha i think for high capacity engines, its possible to have lower rpms.

for a 3.0L accord or bmw, i think the revs is around 2.5k or lower.
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Depends the 3.0L accord or BMW how big Gear Box.. Gear radius/diameter is main course the RPM.
If 3.0L engine go with gen2 gear box.. it will same will go thru 3k rpm, 110kmh.

This post has been edited by LeVis_Jeans: Aug 1 2008, 11:25 AM
radioactive
post Aug 1 2008, 11:21 AM

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myvi 1.0 110km/h at 3.6k rpm
matches engine peak torque at 3.6k
nimrod2
post Aug 1 2008, 11:26 AM

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QUOTE(LeVis_Jeans @ Aug 1 2008, 11:20 AM)
Depends the 3.0L accord or BMW how big Gear Box.. Gear radius is main course the RPM.
If 3.0L engine go with gen2 gear box.. it will same will go thru 3k rpm, 110kmh.
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haha why u wanna compare this sorta things dude?

normal comparison only mah.
LeVis_Jeans
post Aug 1 2008, 11:33 AM

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QUOTE(nimrod2 @ Aug 1 2008, 11:26 AM)
haha why u wanna compare this sorta things dude?

normal comparison only mah.
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Dun let other ppl confuse only ma, hehe tongue.gif
victor_hoh
post Aug 1 2008, 11:58 AM

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Kenari Auto

110km/h at 3.6K RPM.

BTW, for auto user without lockup clutch, the RPM can vary. For example, when u release the trottle, ur RPM will drop faster compared to your speed.
nimrod2
post Aug 1 2008, 12:07 PM

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QUOTE(LeVis_Jeans @ Aug 1 2008, 11:33 AM)
Dun let other ppl confuse only ma, hehe tongue.gif
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the lolz !

QUOTE(victor_hoh @ Aug 1 2008, 11:58 AM)
Kenari Auto
110km/h at 3.6K RPM.
BTW, for auto user without lockup clutch, the RPM can vary. For example, when u release the trottle, ur RPM will drop faster compared to your speed.
*
i think automatic transmission will generally have higher revs for the same speed.

right?
b00n
post Aug 1 2008, 12:11 PM

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QUOTE(nimrod2 @ Aug 1 2008, 12:07 PM)
the lolz !
i think automatic transmission will generally have higher revs for the same speed.

right?
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Yes because of the gear ratio.
It's the same whereby you drag your car at 3rd gear to 110km/h and 5th gear to 110km/h would give you different RPM read.

victor_hoh
post Aug 1 2008, 12:13 PM

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QUOTE(nimrod2 @ Aug 1 2008, 12:07 PM)
the lolz !
i think automatic transmission will generally have higher revs for the same speed.

right?
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I am not comparing auto transmission with manual transmission. What I am saying is, if your auto transmission does not have lock up clutch, your RPM to KM/h ratio will not be fixed 100% of the time, since your gearbox is always slipping against the engine, through the torque convertor.
TSjoanalooidog
post Aug 1 2008, 12:24 PM

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wow, from the readings, smaller cc auto cars tends to have higher rpm readings @ 110km/h.
i feel like the fc will increase when the rpm > 3000
anyone knows for hyundai getz 1.4?
victor_hoh
post Aug 1 2008, 12:29 PM

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QUOTE(joanalooidog @ Aug 1 2008, 12:24 PM)
wow, from the readings, smaller cc auto cars tends to have higher rpm readings @ 110km/h.
i feel like the fc will increase when the rpm > 3000
anyone knows for hyundai getz 1.4?
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it make sense, isn't it? smaller engine needs to work harder to achieve high speed.
Cahill
post Aug 1 2008, 12:30 PM

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QUOTE(sleepwalker @ Aug 1 2008, 09:15 AM)
The lower the RPM, the more efficient the engine and hence better fuel consumption. However, it cannot be used as a comparison as the engine itself would be the main factor in the calculation of fuel consumption and not the gear ratio. Furthermore, there are no aftermarket parts to change gear ratios (too much work to be cost effective) and hence it is seldom a factor in the calculation of FC.

The gear ratio is only effective in calculation if you are comparing 2 cars of the same make, same engine but different gear ratios.
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there are plenty of aftermarket 1-5 gear ratio and final drive. They even can custom made for you if your pocket is deep enough.

But you are right, the RPM at certain speed is all affected by the gear ratio and final drive.
sleepwalker
post Aug 1 2008, 12:44 PM

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QUOTE(Cahill @ Aug 1 2008, 12:30 PM)
there are plenty of aftermarket 1-5 gear ratio and final drive. They even can custom made for you if your pocket is deep enough.

But you are right, the RPM at certain speed is all affected by the gear ratio and final drive.
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No there isn't and custom made ones are not considered as plenty in the market. Plenty in the market means you can walk into BROTHERS and say.. "I'd have that ratio mixed with this one and put them all into the gearbox while I go next door mamak for a teh tarik". That I would consider as plenty in the market.

Gear cogs are not something you find on the shelf in every shop. It is good info to have about RPM per KM/H but that is all.. just nice to have. It is not something we can change easily or even make use of in our daily course of driving and modding. It takes some serious 'moolah' to get it done and not worth it if it is just for FC.

This post has been edited by sleepwalker: Aug 1 2008, 12:45 PM
peris
post Aug 1 2008, 01:04 PM

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QUOTE(Rusty Nail @ Aug 1 2008, 11:20 AM)
i think rims is not an issue (unless you take weight into account) but the tire radius.
http://swatt.j.porter.name/tech-center/tool/tire-calculator
compare your stock tire with the new ones that you are using. then you can see the difference in size.
*
Thanks..will try.. thumbup.gif
phas3r
post Aug 1 2008, 02:41 PM

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Satria Neo 1.6(A) 110km/h = 3000rpm highest gear(4th)

so if the readings of the speedo are not affected by rim size, means say if 13" rims, 110km/h real speed,110km/h speedo speed, 3000rpm.....
n then use 16" rims 130km/h real speed, 110km/h speedo speed, 3000rpm..
means use bigger rims can make your car quieter??
b00n
post Aug 1 2008, 02:44 PM

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QUOTE(phas3r @ Aug 1 2008, 02:41 PM)
Satria Neo 1.6(A) 110km/h = 3000rpm highest gear(4th)

so if the readings of the speedo are not affected by rim size, means say if 13" rims, 110km/h real speed,110km/h speedo speed, 3000rpm.....
n then use 16" rims 130km/h real speed, 110km/h speedo speed, 3000rpm..
means use bigger rims can make your car quieter??
*

Quieter?....... rclxub.gif

Ultima
post Aug 1 2008, 02:56 PM

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so lets say im using campro now n using this INVECSII (i think) gearbox from mitsu...

izzit possible to change to other gearbox? lets say from mitsu also, izzit possible?

btw, i still dun get it, in campro, got engine braking concept rite, the one which will lower ur gear when u going downhill..

will it consume petrol more? lets say i drive at 90km/h with around 2.6k rpm, n suddenly the engine braking activated when going downhill without pressing the pedal..

so should i press the pedal more lets say 110km/h at 3k rpm so the engine braking will not activated or juz let the engine braking lower the gear and make it whooping at around 4k rpm at 90km/h without pressing the pedal sweat.gif

which one consume less fuel? sweat.gif

sori if im talking crap here sweat.gif im no good in engrish sweat.gif
honkit
post Aug 1 2008, 03:07 PM

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2700rpm @ 110kph on my suzuki swift.

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