QUOTE(sam_01 @ Oct 18 2008, 12:32 AM)
My perdana V6 shows ~2800 revs at 110km/h.
To prove it:
Perdana v6 gear ratios:
Gear Ratio 1st = 2.846
2nd = 1.581
3rd = 1.000
4th = 0.685
Final Gear Ratio = 4.350
110km/h change to meters/minutes = (110 x 1000) / 60
= 1833.3 meters/mins
Speed reduction at Final gear = 0.685 x 4.35
= 2.979
Meaning 1 tire rotation equals 2.979 engine turns.
Tire circumference (stock perdana v6 205/55 R16) = 1.986 meters.
Tire revs per min = 1833 / 1.986
= 922.96 tire revolution / min
Engine revolution per min = 922.96 x 2.979
= 2749 revs / mins
So the calculated engine revs is close the reading on the rev meter (-51 revs).
But that was when my auto gearbox is ok.
Now using manual gearbox becoz my auto box kong already.
Manual tranny reads 3100 @ 110 km/h.
Not sure what are the gear ratios on the manual tranny.
You must be expert in Maths...

Help me to calculate with this...
Kembara.
st: 2.730, 2nd:1.526, 3rd:1.000, 4th:0.696. Rev.:2.290
Added on November 5, 2008, 7:06 pmQUOTE(stormyz @ Nov 3 2008, 11:04 PM)

My RPM 4.5k @ 110 KM/H ... something not rite..
anyone can guide me...?
4g13 ....
That external rpm meter maybe not that accurate la....
How you feel about the sound?
You can judge from the sound actually
I feel that original rpm is more accurate.
Added on November 5, 2008, 7:14 pmQUOTE(ahpaul82 @ Oct 15 2008, 11:37 AM)
98' Perodua Kancil 850EX (M)
[attachmentid=630441]
110KM/h @ 4.2k-RPM
engine want explode already

I have an old Iswara A/T (1993), put it aside for a long time already.
The result is worst than your Kancil...

110km/h need around 4.5.
Last week i have nothing to do, then suddenly arise an idea, why not i try the max speed for a 15 years car..
Then i depress all the pedal while on highway, suprisingly, can get 150km/h and up, but the rpm is 6.5...
And the engine really sounds like it's going to explode anytime soon and you know la..
Proton's quality, it shake like i'm not driving a car but driving a 'horse operated car' instead.
And the sound also like aeroplane going to take off

Then after that when i drive home, the car spoilt already... Pity...
The problem is: When i didn't press the acceleration pedal, the engine will die, any idea how to solve it? Till now still didn't repair it... Just put it aside...
Added on November 5, 2008, 7:16 pmQUOTE(torresism @ Oct 15 2008, 09:31 PM)
That consider a very bad result for a new car...
This post has been edited by sjz: Nov 5 2008, 07:17 PM