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Geek Culture / Quick Qestion

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hexGEAR
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Posted: 17th Feb 2005 06:00
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The image says it all:



Has it got something to do with the car engine's RPM (Revolutions per minute)? and if so then how?

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Mr Pointless
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Posted: 17th Feb 2005 06:02 Edited at: 17th Feb 2005 06:04
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I think so, and it could be in thousands. Why, doesn't it explain it in the manual, or are you using a demo?

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Dazzag
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Posted: 17th Feb 2005 06:03
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Looks like the rev counter to me. ie. change gear up when between 7-9 (times 1000 for real RPM). Need lower gear for fast acceleration if low numbers.

Cheers

I am 99% probably lying in bed right now... so don't blame me for crappy typing
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bitJericho
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Posted: 17th Feb 2005 06:17
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it's called a tachometer, pronounced "tack-om-meter"

it measures the rotations per minute of the engine.

In racing games, it's usually used as an indicator of when to shift, as in, after the engine doesn't accelerate any longer you shift up, and watching the tachometer you can get the best acceleration..

In real life driving situations you rarely want to go very high with the tachometer, as it's bad for the engine.


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hexGEAR
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Posted: 17th Feb 2005 06:18
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yeah, that's what i thought... thanks guys!

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bitJericho
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Posted: 17th Feb 2005 06:23
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ahh btw, on normal tachometers it usually tells you how many times the number indicated on the tachometer needs to be multiplied to get the actual number. It's usually 1000.


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hexGEAR
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Posted: 17th Feb 2005 06:28
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Cool, 'cus i got this graph showing the Torque curve per gear of a corvette C5:



and as you can see, gear 1 only ranges from about 100 to 700 RPM. Maybe i'm missing something.

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Neofish
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Posted: 17th Feb 2005 06:32
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The lines look like they are drawn in paint

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Dazzag
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Posted: 17th Feb 2005 06:32
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Quote: "In real life driving situations you rarely want to go very high with the tachometer, as it's bad for the engine"
Depends if you want to leave people in the dust. Bit annoying if you forget those engine limiters when you hit it's max rev. More annoying if you don't have limiters of course....

Although in real life you may not need to get to max revs in a gear before changing up to get the max speed through the gears. My third gear is better, for example, than my second gear when I get to about 1000 revs off the top.

Oh, and if you have a turbo then is also a good guide to when the turbo(s) kick in. Mine for instance starts at about 2500RPM. For another example, I think the Toyota Supra kicks in at about 3-4k, and the second one starts up about 7-8k. Nice twin turbo... Although I can just about keep up with the automatic version.

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I am 99% probably lying in bed right now... so don't blame me for crappy typing
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hexGEAR
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Posted: 17th Feb 2005 06:44
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So is there like an RPM limit for each gear like the picture implies?

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Dazzag
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Posted: 17th Feb 2005 07:43
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Yeah. They are all the same. The pic shows it can do 9k in each gear, but recommends 7k (covering it's ar*e).

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I am 99% probably lying in bed right now... so don't blame me for crappy typing
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Dave J
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Posted: 17th Feb 2005 15:03
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You don't watch the tachometer to change gears, you listen to the engine, baby. That's the real way to drive.


"Computers are useless, they can only give you answers."
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Foxy
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Posted: 17th Feb 2005 15:19
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Quote: "You don't watch the tachometer to change gears, you listen to the engine, baby. That's the real way to drive."


You probably cant even drive *envisions Exeat buzzing down the highway on his turbo charged mo-ped*

If I were you and you were me, then you'd be yourself 'cos you are me and I am you.
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Dave J
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Posted: 17th Feb 2005 17:14
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I should certainly hope I can drive, otherwise those driving test instructors have a lot to answer for.


"Computers are useless, they can only give you answers."
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Foxy
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Posted: 17th Feb 2005 18:43
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True, true.

*bzzzzzzzzzz*

If I were you and you were me, then you'd be yourself 'cos you are me and I am you.
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bitJericho
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Posted: 17th Feb 2005 23:04
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Quote: "You don't watch the tachometer to change gears, you listen to the engine, baby. That's the real way to drive"


Heh, that's true Get me on a simulator for a while, and I don't need to look at the tachometer to know when to switch gears...

IRL my life isn't as exciting...

*drives an automatic 97 geo metro.. 4 cylinder...

Ya, I'm poor


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hexGEAR
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Posted: 18th Feb 2005 04:31
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Dazzag:

Actually i meant the graph and not the original screenshot. You see on the graph each gear has a different RPM limit... like gear 1 between 100 and 700, gear 2 between 200 and 1000 etc. So are these the recommended RPM's for each gear? in real life are all the lines basically the same length?

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Dazzag
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Posted: 18th Feb 2005 04:47
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Can't work out the graph. To change gear before 1000RPMs in first gear to get the max performance seems wrong. Hell, mine doesn't even kick in the turbo until 2.5k. ie. I wouldn't hit the turbo until 5th gear. Don't think so. Once in 2nd gear power onto some serious MPG and really quite high on the RPM. Then let 3rd gear pull you to around 100mph. Look in mirror for Barryboy in Vauxhall Vectra. Will be on horizon somewhere.

Ahem, if you want a laugh BTW, go to [href]www.barryboys.co.uk[/href] The forums are class.

Cheers

I am 99% probably lying in bed right now... so don't blame me for crappy typing
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hexGEAR
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Posted: 19th Feb 2005 05:06
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yeah your right... thanks a lot!

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bitJericho
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Posted: 19th Feb 2005 06:13
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well, here's an article all about torque, horsepower, and rpms

http://auto.howstuffworks.com/horsepower.htm


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hexGEAR
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Posted: 19th Feb 2005 07:41
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Thanks a lot man, could prove useful!

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