Omega Owners Forum
Chat Area => General Car Chat => Topic started by: Field Marshal Dr. Opti on 21 March 2017, 15:40:09
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Is there a simple equation for this?
Can the answer be found with a final drive ratio (2.56) and gear ratio (0.667) or is further information required?
.......and yes I know you can get a rough idea from speedo and rev counter readings.
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Two questions ...
1) Why do you need to know this?
2) Does your inbox have any space- still trying to PM you!
Ta
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I suspect wheel diameter (and therefore circumference) will be needed.
Also it will doubtless only work for manuals and autos when in full lock-up.
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I'll start: my astra is showing 3500 at 70.
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Two questions ...
1) Why do you need to know this?
2) Does your inbox have any space- still trying to PM you!
Ta
In answer to your questions, Robert.
1. Just interested.
2. I'll look into this. I thought I'd sorted it.
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I'll start: my astra is showing 3500 at 70.
Try changing into top gear. :)
That sounds like gearing from a 1966 Cortina. :)
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I suspect wheel diameter (and therefore circumference) will be needed.
Also it will doubtless only work for manuals and autos when in full lock-up.
I did suspect this, Jimmy. And then what would I do with the additional information?
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I suspect wheel diameter (and therefore circumference) will be needed.
Also it will doubtless only work for manuals and autos when in full lock-up.
I did suspect this, Jimmy. And then what would I do with the additional information?
Multiply it by the diameter of the tyre minus the diameter of the wheel X Pi - the outside temperature.
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I suspect wheel diameter (and therefore circumference) will be needed.
Also it will doubtless only work for manuals and autos when in full lock-up.
I did suspect this, Jimmy. And then what would I do with the additional information?
Multiply it by the diameter of the tyre minus the diameter of the wheel X Pi - the outside temperature.
Are you taking the piss? :)
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Multiply it ::)
Distance travelled per revolution... :y smaller diameter tyres require more rpm for a given speed as they travel a shorter distance per rotation :y
Diameter referring to rolling radius rather than wheel diameter ;)
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I suspect wheel diameter (and therefore circumference) will be needed.
Also it will doubtless only work for manuals and autos when in full lock-up.
I did suspect this, Jimmy. And then what would I do with the additional information?
Multiply it by the diameter of the tyre minus the diameter of the wheel X Pi - the outside temperature.
Are you taking the piss? :)
Moi? ;D
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Isn't it in the manual? From memory, for a 2.6 FL auto saloon in locked top it's 28 mph per 1000 rpm.
Ron.
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Multiply it ::)
Distance travelled per revolution... :y smaller diameter tyres require more rpm for a given speed as they travel a shorter distance per rotation :y
ameter referring Dito rolling radius rather than wheel diameter ;)
Lets say wheel and tyre have a diameter of 28 inches. So circumference 28 x 3.14(ish) equals 88 inches(ish) Car travels seven feet four inches with each revolution of the wheel.
Yes?
No?
No idea?
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This is a bit American-acised, however should work
http://www.crawlpedia.com/rpm_gear_calculator.htm (http://www.crawlpedia.com/rpm_gear_calculator.htm)
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...or is it 3.14 times the radius (14 inches) rather than diameter?
My brain is starting to hurt. ::)
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bet your glad you started this ;D
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...or is it 3.14 times the radius (14 inches) rather than diameter?
My brain is starting to hurt. ::)
Circumference = 2piR = 2 x 3.14159 x radius
which is the same as piD or 3.14159 x diameter
or if you wish to be more accurate ..
3.14159265358979323846264338327950288419716939937510 x diameter
:)
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...or is it 3.14 times the radius (14 inches) rather than diameter?
My brain is starting to hurt. ::)
Circumference is 2Pir, so 2x(3.142x14) ;)
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All far too technical for me , will go back to reading my book.
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That was just an approximation to Pi, Nige - you need a few more decimal places for true accuracy; it goes on to infinity, apparently.
May we both live long enough..... ;D :y
Ron.
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This is a bit American-acised, however should work
http://www.crawlpedia.com/rpm_gear_calculator.htm (http://www.crawlpedia.com/rpm_gear_calculator.htm)
Thanks, jimmy.
The accurate parts. Final drive 2.56 and gear ratio 0.667. :y
The guesswork, Wheel and tyre 28 inches in diameter.
This combination gives me 48.8 MPH for each 1000 RPM.
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That was just an approximation to Pi, Nige - you need a few more decimal places for true accuracy; it goes on to infinity, apparently.
May we both live long enough..... ;D :y
Ron.
"Pi has been calculated to over one trillion digits beyond its decimal point. As an irrational and transcendental number, it will continue infinitely without repetition or pattern."
.. perhaps we should start counting now Ron ...... :)
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Isn't it in the manual? From memory, for a 2.6 FL auto saloon in locked top it's 28 mph per 1000 rpm.
Ron.
Sounds about right, Ron.
100 MPH was slightly less than 4000 RPM in my 2.6 auto.
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That was just an approximation to Pi, Nige - you need a few more decimal places for true accuracy; it goes on to infinity, apparently.
May we both live long enough..... ;D :y
Ron.
"Pi has been calculated to over one trillion digits beyond its decimal point. As an irrational and transcendental number, it will continue infinitely without repetition or pattern."
.. perhaps we should start counting now Ron ...... :)
Yes.....apparently the sun has only enough energy to last another 4 billion years. :)
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My Chevette HS was 18.9 mph / 1000 rpm in top gear.This could be why it only did 18mpg. ;D
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My Chevette HS was 18.9 mph / 1000 rpm in top gear.This could be why it only did 18mpg. ;D
With a torquey 2.3 litre lump top gear acceleration would have been good though. :y
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Is that an American billion or a proper on, Dr Opti? It's important to know how much to worry..... :-\
Ron.
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Is that an American billion or a proper on, Dr Opti? It's important to know how much to worry..... :-\
Ron.
Well Ron, a billion has always been a thousand million when I do the maths (or should that be 'math' for our cousins from the former British colonies) ;D
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That's an American billion - OURS is a million million.
There is an English term for a thousand million - a Milliard - but few people use it as it's so close to million.
Why not avoid confusion and follow scientific practice (and computing terminology) use Mega, Giga, Tera, etc?
Ron.
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That's an American billion - OURS is a million million.
There is an English term for a thousand million - a Milliard - but few people use it as it's so close to million.
Why not avoid confusion and follow scientific practice (and computing terminology) use Mega, Giga, Tera, etc?
Ron.
There is no confusion, Ron, everyone uses a thousand million for a billion now.
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That's an American billion - OURS is a million million.
There is an English term for a thousand million - a Milliard - but few people use it as it's so close to million.
Why not avoid confusion and follow scientific practice (and computing terminology) use Mega, Giga, Tera, etc?
Ron.
There is no confusion, Ron, everyone uses a thousand million for a billion now.
That's what I thought........and a thousand billion makes one trillion.
I've no idea what a thousand trillion becomes..... :D
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More than you could count on one hand whilst sucking your thumb I'll wager ::)
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http://images.omegaowners.com/images/techinfo/omega_gearratios/gearratiosbv9.jpg
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That's an American billion - OURS is a million million.
There is an English term for a thousand million - a Milliard - but few people use it as it's so close to million.
Why not avoid confusion and follow scientific practice (and computing terminology) use Mega, Giga, Tera, etc?
Ron.
There is no confusion, Ron, everyone uses a thousand million for a billion now.
That's what I thought........and a thousand billion makes one trillion.
I've no idea what a thousand trillion becomes..... :D
A quadrillion.
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That's an American billion - OURS is a million million.
There is an English term for a thousand million - a Milliard - but few people use it as it's so close to million.
Why not avoid confusion and follow scientific practice (and computing terminology) use Mega, Giga, Tera, etc?
Ron.
There is no confusion, Ron, everyone uses a thousand million for a billion now.
That's what I thought........and a thousand billion makes one trillion.
I've no idea what a thousand trillion becomes..... :D
A quadrillion.
Followed by quintillion.....
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That's an American billion - OURS is a million million.
There is an English term for a thousand million - a Milliard - but few people use it as it's so close to million.
Why not avoid confusion and follow scientific practice (and computing terminology) use Mega, Giga, Tera, etc?
Ron.
There is no confusion, Ron, everyone uses a thousand million for a billion now.
That's what I thought........and a thousand billion makes one trillion.
I've no idea what a thousand trillion becomes..... :D
A quadrillion.
Followed by quintillion.....
Yes..quadrillion...1,000,000,000,000...four sets of 000
Quintillion....1,000,000,000,000,000...five sets of 000
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Regarding this whole thread.... wtf ??? ??? ???
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Regarding this whole thread.... wtf ??? ??? ???
It's for educated people, Webby. Nothing here for you to see...move along please.... ;D
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Regarding this whole thread.... wtf ??? ??? ???
It's for educated people, Webb. Nothing here for you to see...move along please.... ;D
Yeah I totally get that. But not one post makes sense to me. Kinda feeling retarded right now. Common feeling for me sadly ;D
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Regarding this whole thread.... wtf ??? ??? ???
It's for educated people, Webb. Nothing here for you to see...move along please.... ;D
Yeah I totally get that. But not one post makes sense to me. Kinda feeling retarded right now. Common feeling for me sadly ;D
If you're bored Mr Bear you could always start a 0-60 Omega thread. Don't think it's been done before. :)
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This is a bit American-acised, however should work
http://www.crawlpedia.com/rpm_gear_calculator.htm (http://www.crawlpedia.com/rpm_gear_calculator.htm)
Thanks, jimmy.
The accurate parts. Final drive 2.56 and gear ratio 0.667. :y
The guesswork, Wheel and tyre 28 inches in diameter.
This combination gives me 48.8 MPH for each 1000 RPM.
Sounds about right, I tested it using the M140i's vital statistics and it came out to about 1700rpm at 75mph. Which is what I remember from the speedo.
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That's an American billion - OURS is a million million.
There is an English term for a thousand million - a Milliard - but few people use it as it's so close to million.
Why not avoid confusion and follow scientific practice (and computing terminology) use Mega, Giga, Tera, etc?
Ron.
There is no confusion, Ron, everyone uses a thousand million for a billion now.
That's what I thought........and a thousand billion makes one trillion.
I've no idea what a thousand trillion becomes..... :D
A quadrillion.
Followed by quintillion.....
Yes..quadrillion...1,000,000,000,000...four sets of 000
Quintillion....1,000,000,000,000,000...five sets of 000
Do I hear a bid of a googol?
(raise you a googolplex if you do)
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This is a bit American-acised, however should work
http://www.crawlpedia.com/rpm_gear_calculator.htm (http://www.crawlpedia.com/rpm_gear_calculator.htm)
Thanks, jimmy.
The accurate parts. Final drive 2.56 and gear ratio 0.667. :y
The guesswork, Wheel and tyre 28 inches in diameter.
This combination gives me 48.8 MPH for each 1000 RPM.
Sounds about right, I tested it using the M140i's vital statistics and it came out to about 1700rpm at 75mph. Which is what I remember from the speedo.
Cars these days come with gearing that wouldn't be out of place on the Starship Enterprise. Back in the day 20 MPH/1000 RPM was considered to be almost an overdrive.
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I’m sorry to disagree with an Omega Lord, Mr. STEMO, but your “explanation doesn’t bear close examination – or logical assessment!
YOU say:-
Quintillion = 5 x “illion” = 5 x “000” = 1,000,000,000,000,000
Quadrillion = 4 x “illion” = 4 x “000” = 1,000,000,000,000
Trillion = 3 x “illion” = 3 x “000” = 1,000 000,000
Billion = 2 x “illion” = 2 x “000” = 1,000.000
Million = 1 x “illion” = 1 x “000” = 1,000
Can you see where you went wrong there?
I say:-
Let “illion” stand for “000,000” i.e. Mono-illion, shortened to Million.
Then billion = Bi-illion, or Billion = 2 x “000.000” = Billion
Hence Trillion = Tri-illion, or Trillion = 3 x “000,000” = Trillion
Quad Erat Demonstranduma :)
Ron.
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That's exactly how it used to work until we, sensibly, aligned with the yanks. I was taught at school the same as you, that one billion was 1,000,000,000,000. The numbers changed, that terms didn't.
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Sorry Ron, but in your example, I make that one, two and three MILLION respectively ;)
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I challenge "sensibly"; our system is perfectly logical, and correct. Sadly, as usual, the Americans take our perfect systems and 'dangle berries' it up - they did the =same with the wonderful language that we gave them!
Recently, the OED declared that our lexicon had passed the one million (that's 1,000,000) word mark. I believe the American word count is almost up to 55 now - some of them with TWO syllables! ;D
Ron.
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Talkin (no g) slow don't make me stupid :P
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DG, you misinterpreted me, or I was not clear enough!
Million = 1 x “000,000” = 1,000,000 = 1 Million
Billion = 2 x “000.000” = !,000,000,000,000 = 1 Billion
Trillion = 3 x “000,000” = 1,000,000,000,000,000,000 = 1 Trillion
Ron.
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Jeez you guys really need to get out more! :P ;D
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I challenge "sensibly"; our system is perfectly logical, and correct. Sadly, as usual, the Americans take our perfect systems and 'dangle berries' it up - they did the =same with the wonderful language that we gave them!
Recently, the OED declared that our lexicon had passed the one million (that's 1,000,000) word mark. I believe the American word count is almost up to 55 now - some of them with TWO syllables! ;D
Ron.
The language is 'English' and the lard-arsed yanks should learn to use it not *uck about with it. :)
Colour not color.
Centre not center.
Perhaps we should take the colonies back. :)
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Listen to the good Doctor, him know what him talk about! :y 8)
Ron.
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I challenge "sensibly"; our system is perfectly logical, and correct. Sadly, as usual, the Americans take our perfect systems and 'dangle berries' it up - they did the =same with the wonderful language that we gave them!
Recently, the OED declared that our lexicon had passed the one million (that's 1,000,000) word mark. I believe the American word count is almost up to 55 now - some of them with TWO syllables! ;D
Ron.
The language is 'English' and the lard-arsed yanks should learn to use it not *uck about with it. :)
Colour not color.
Centre not center.
Perhaps we should take the colonies back. :)
Giving them independence didn't help, they all moved here.