#2781 - 17/10/04 12:28 PM
Re: Fiesta ST Gear Ratios.
[Re: Hugh]
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n00b
Registered: 17/10/04
Posts: 9
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Quote:
Easily hit 60 in second then. 
Did you create this in excel yourself? My my, you might get a D in GCSE maths if you are lucky
Edited by ChrisCumbria (26/10/06 05:01 PM)
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#2782 - 17/10/04 01:22 PM
Re: Fiesta ST Gear Ratios.
[Re: Doug]
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Fiesta Mad
Registered: 16/03/04
Posts: 291
Loc: Stoke-on-Trent
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Quote:
Quote:
Easily hit 60 in second then.
Did you create this in excel yourself? My my, you might get a D in GCSE maths if you are lucky
Hu?
Welcome by the way 
Edited by ChrisCumbria (26/10/06 05:02 PM)
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#2783 - 17/10/04 05:24 PM
Re: Fiesta ST Gear Ratios.
[Re: Doug]
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Registered: 27/02/04
Posts: 1620
Loc: Warks
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Quote:
Quote:
Easily hit 60 in second then.
[image]http://fiesta.mediahoard.com/chimage.php?image=19371314102004641466.jpg[/image]
Did you create this in excel yourself? My my, you might get a D in GCSE maths if you are lucky
No I didn't, I got it off a gearbox specialists website.
Nice first post. 
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#2784 - 17/10/04 08:05 PM
Re: Fiesta ST Gear Ratios.
[Re: Hugh]
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n00b
Registered: 17/10/04
Posts: 9
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Specialist?
Wot, so you are going to get nice linear speed to RPM ratio's in real life are you?
The car will go at 220 mph at 10.5k revs in 5th? don't think so!
The car will go at 20 mph at 1k revs in 5th? Don't think so!
Maybe you should learn some basic physics, oh and learn not use the crappy default graph settings in excel.
Your graph is about as accurate as my Nan's eyesight!
The only thing "specialist" about this is maybe a "special" person who sits licking the window in a sunshine bus made it!
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#2785 - 17/10/04 08:13 PM
Re: Fiesta ST Gear Ratios.
[Re: Doug]
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Fiesta Fan
Registered: 24/05/04
Posts: 214
Loc: Nuneaton, Warwickshire
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I think you should have ago at doing the maths for us then Doug  Here's the Ratio's Transmission ratios 1st 3.583 2nd 2.038 3rd 1.414 4th 1.108 5th 0.878 Reverse 3.615 Final drive 3.824 Please Have Ago!
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#2789 - 18/10/04 05:01 AM
Re: Fiesta ST Gear Ratios.
[Re: Scotty]
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n00b
Registered: 18/10/04
Posts: 37
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Hey newbie here, got a little tool for calculating gear speed at rpm. The xecel sheet is the way gear speed at rpm is represented, may not be accurate nor realystic but it's done that way.
Now, for numbers, i just need to know the size of drive tyres, if circumference was available would be better.
Supposing tires are 235/45 R17 (roughly same circumference as 205/40 R17 tyres, i would need exact circumference for 205/40 R17 for exact numbers), and the redline is 6500rpm, then it would be something like this:
gear:kph/mph
1st: 55.9/34.8
2nd: 98.3/61.1
3rd: 141.7/88.1
4th: 180.9/112.4
5th: 228.3/141.9
Rv: 55.4/34.5
Sounds about right, roughly the same numbers i guet in my focus with 190/60 R15 tyres.
Also i guess redline rpm would be 6800rpm (dont know) so i put this one too:
gear:kph/mph
1st:58.5/36.4
2nd:102.9/63.9
3rd:148.3/92.2
4th:189.2/117.6
5th:238.8/148.4
Rv:58.0/36.0
Considering drag i guess the number are about right considering it's only 150ps and would not overcome drag over the 130mph topspeed
If you want the program let me know
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#2791 - 18/10/04 07:25 AM
Re: Fiesta ST Gear Ratios.
[Re: Doug]
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Fiesta Fan
Registered: 28/02/04
Posts: 204
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Quote:
Specialist?
Wot, so you are going to get nice linear speed to RPM ratio's in real life are you?
The car will go at 220 mph at 10.5k revs in 5th? don't think so!
The car will go at 20 mph at 1k revs in 5th? Don't think so!
Maybe you should learn some basic physics, oh and learn not use the crappy default graph settings in excel.
Your graph is about as accurate as my Nan's eyesight!
The only thing "specialist" about this is maybe a "special" person who sits licking the window in a sunshine bus made it!
What's the matter? The 3 Billy Goats been trampling on your bridge a bit much??
Having known Hugh for the past 9 years, and having to have gone through University with him, there is no one more than me who enjoys to take the piss out of daft comments he comes out with....
However, I always ensure that if I do, then my argument is well structured and backed up by susbtantial evidence. If not, then the outcome is that I look like a twat, which is exactly what you've done here....
Now before you come back with some rant, I acknowledge there is the possibility you're right. If so, get some evidence and post it on here. The decent bloke that Hugh is, I know for a fact that in the face of evidence to prove he is wrong, he will admit the fact and 'stand corrected'..
What I suggest is you do the maths, post it on here and then we can discuss the matter amongst all of us. One of you is right and one of you is wrong, but for the time being, only one of you have produced something to back up your claim...
Oh and for the record, both Hugh and I have an honours degree in Engineering of which, I am sure you are aware, Maths is an integral part.....
Now run along now and be a nice chap and let those goats graze in the nice meadow..... 
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#2793 - 18/10/04 10:12 AM
Re: Fiesta ST Gear Ratios.
[Re: Craig]
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Registered: 27/02/04
Posts: 1620
Loc: Warks
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Quote:
Now before you come back with some rant, I acknowledge there is the possibility you're right. If so, get some evidence and post it on here. The decent bloke that Hugh is, I know for a fact that in the face of evidence to prove he is wrong, he will admit the fact and 'stand corrected'..
All very true Craig, however I don't need to stand corrected. As stated previously I got the graph from spreadsheet generated from a gearbox specialist's website. All I did was post it up. This fact has been conveniently ignored however, either that or his eyesight is as bad as his nan's....
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