Ford Fiesta ST
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#2765 - 14/10/04 06:39 PM Fiesta ST Gear Ratios.
Hugh Offline


Registered: 27/02/04
Posts: 1620
Loc: Warks
Easily hit 60 in second then.



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#2766 - 14/10/04 06:48 PM Re: Fiesta ST Gear Ratios. [Re: Hugh]
irmscher Offline
n00b

Registered: 14/10/04
Posts: 8
Loc: Herts
I'll have to see what the kickin' griffin' can do! will report back 2moro...
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Jimmy

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#2767 - 14/10/04 07:06 PM Re: Fiesta ST Gear Ratios. [Re: irmscher]
Scotty Offline
Porsche 997 Turbo & ST150

Registered: 27/02/04
Posts: 18100
Loc: Nuneaton, Warwickshire
Hugh... Power Band is usually Just below 6,000RPM... Maybe 5,800RMP when the change is needed to 3rd so looks like it will have to be 3rd year to 60 for full power.
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#2768 - 14/10/04 07:19 PM Re: Fiesta ST Gear Ratios. [Re: Scotty]
Hugh Offline


Registered: 27/02/04
Posts: 1620
Loc: Warks
What are you saying there Scotty.

If you change to 3rd and then finally reach 4700rpm (3rd gear @60mph) it is not full power and adding an extra gear change is going to make a huge difference to the 0-60 time.

Using 1st & 2nd gears will get you your quickest 0-60time. If you want to carry on accelerating past 60 then yes 3rd gear will be necessary, as will 4th and 5th.

Oh, and peak power is @ 6000rpm.

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#2769 - 14/10/04 07:31 PM Re: Fiesta ST Gear Ratios. [Re: Hugh]
davidChief Offline
Test Account

Registered: 27/02/04
Posts: 864
Loc: Warwickshire
Nice one Hugh. I can see what Scott is saying, but tbh, I'd rather have a car with shorter ratios. The ST170 can hit something stupid like 180mph in 2nd, and the long ratios suck!
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Dave | Focus RS

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#2770 - 14/10/04 07:52 PM Re: Fiesta ST Gear Ratios. [Re: Hugh]
Scotty Offline
Porsche 997 Turbo & ST150

Registered: 27/02/04
Posts: 18100
Loc: Nuneaton, Warwickshire
Quote:

What are you saying there Scotty.

If you change to 3rd and then finally reach 4700rpm (3rd gear @60mph) it is not full power and adding an extra gear change is going to make a huge difference to the 0-60 time.

Using 1st & 2nd gears will get you your quickest 0-60time. If you want to carry on accelerating past 60 then yes 3rd gear will be necessary, as will 4th and 5th.

Oh, and peak power is @ 6000rpm.




I was just commenting as 0-60 indeed could be done in 2nd but if u was going any faster or a 0-100 run it would be better to shift before 60, therefore slowing 0-60 down but increasing the 0-100 speed as i know on the 1/4 mile i get to the top end of 3rd. I have to change to 4th before the line because 3rd makes it, but the power band is greater in 4th than after 5,700RPM in 3rd. Its complicated to explain but the only way to truely tell is to do it!?


Edited by FiestaRS (14/10/04 07:58 PM)
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#2771 - 14/10/04 08:35 PM Re: Fiesta ST Gear Ratios. [Re: Scotty]
Hugh Offline


Registered: 27/02/04
Posts: 1620
Loc: Warks
Just because you have got near the peak power of the rev range doesn't mean that you should grab another gear, the power curve doesn't fall off a cliff once you've passed the peak.

The ST will make more power at 7000rpm than at 3500rpm so it is not a waste to take it past the 6000 peak near to the limiter, then when you do change gear you are going faster so you are higher up the power curve when in the next gear so you don't have to battle through the c. 50bhp @3000rpm stage.

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#2772 - 14/10/04 09:07 PM Re: Fiesta ST Gear Ratios. [Re: Hugh]
Scotty Offline
Porsche 997 Turbo & ST150

Registered: 27/02/04
Posts: 18100
Loc: Nuneaton, Warwickshire
Quote:

Just because you have got near the peak power of the rev range doesn't mean that you should grab another gear, the power curve doesn't fall off a cliff once you've passed the peak.

The ST will make more power at 7000rpm than at 3500rpm so it is not a waste to take it past the 6000 peak near to the limiter, then when you do change gear you are going faster so you are higher up the power curve when in the next gear so you don't have to battle through the c. 50bhp @3000rpm stage.




Hugh, want a fight m8

Seriously tho i think we are both right in what were saying and could argue this out all night but since we are both utterly briliant i will accept ur answer and also think mines better
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#2773 - 14/10/04 09:10 PM Re: Fiesta ST Gear Ratios. [Re: Hugh]
supercharged Offline
Fiesta Fan

Registered: 24/05/04
Posts: 214
Loc: Nuneaton, Warwickshire
Hmm, just wanted to check really, i've had ago in a 1.8zetec focus, and at stock will also do 60mph in second! So with reading all the press release and everything, i want the ST even more
It certainly is gonna be a great car! Ford tend to get this things right though, as soon as they release a new car it tends to become a class leader, and im sure the ST will in the small hot hatch market

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#2774 - 14/10/04 09:27 PM Re: Fiesta ST Gear Ratios. [Re: supercharged]
Scotty Offline
Porsche 997 Turbo & ST150

Registered: 27/02/04
Posts: 18100
Loc: Nuneaton, Warwickshire
Quote:

Hmm, just wanted to check really, i've had ago in a 1.8zetec focus, and at stock will also do 60mph in second! So with reading all the press release and everything, i want the ST even more
It certainly is gonna be a great car! Ford tend to get this things right though, as soon as they release a new car it tends to become a class leader, and im sure the ST will in the small hot hatch market




Yer theres no dowt it will do more than 60mph in second it was just wandering about the gearbox...

The Focus 1.6 and 1.8 both have long shifts which are much more affective than the 2.0 focus as in the 2.0 the shift is earlier.

Were nearly there... the first person to drive one will have to test all this out!!!
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#2775 - 14/10/04 09:42 PM Re: Fiesta ST Gear Ratios. [Re: Scotty]
Hugh Offline


Registered: 27/02/04
Posts: 1620
Loc: Warks
LOL!!! Caught me on a nerve I think!

Anyway, I have just had it properly explained to me by my Forumla 1 chum, so will say he's right instead (especially as he agrees with me! ).

It all comes down to what's called tractive effort. This is the force applied to the road by the wheel to cause movement.

It is caculated by by multiplying the torque by the total ratio of power train and dividing this sum by the rolling radius of the driving tyres.

As you can guess, if you reduce the total power train ratio (say moving from 1st to 2nd) it reduces the over TE figure meaning you are reducing the overall force applied to the road.

It is infinitly more technical way of looking at it than I was, but the result is the same. To get the best accelerating time you would need to calculate the optimum gearchange based on a vehicles power/torque/gear ratio/differential/tyre radius.

Personally, I think I'll just go and have a brew instead as it feels like I'm back at school!

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#2776 - 14/10/04 09:47 PM Re: Fiesta ST Gear Ratios. [Re: Hugh]
supercharged Offline
Fiesta Fan

Registered: 24/05/04
Posts: 214
Loc: Nuneaton, Warwickshire
lol, whoever said that we learn something new everyday, was damn right!

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#2777 - 14/10/04 10:27 PM Re: Fiesta ST Gear Ratios. [Re: supercharged]
davidChief Offline
Test Account

Registered: 27/02/04
Posts: 864
Loc: Warwickshire
I would rather have a close ratio box anyway. Hitting 60 in 2nd is a bad thing IMO when you only have 150bhp. The only thing it does is reduce the 0-60 time which is itself a meaningless measure.
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Dave | Focus RS

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#2778 - 15/10/04 07:07 AM Re: Fiesta ST Gear Ratios. [Re: Hugh]
Craig Offline
Fiesta Fan

Registered: 28/02/04
Posts: 204
Quote:

LOL!!! Caught me on a nerve I think!

Anyway, I have just had it properly explained to me by my Forumla 1 chum, so will say he's right instead (especially as he agrees with me! ).

It all comes down to what's called tractive effort. This is the force applied to the road by the wheel to cause movement.

It is caculated by by multiplying the torque by the total ratio of power train and dividing this sum by the rolling radius of the driving tyres.

As you can guess, if you reduce the total power train ratio (say moving from 1st to 2nd) it reduces the over TE figure meaning you are reducing the overall force applied to the road.

It is infinitly more technical way of looking at it than I was, but the result is the same. To get the best accelerating time you would need to calculate the optimum gearchange based on a vehicles power/torque/gear ratio/differential/tyre radius.

Personally, I think I'll just go and have a brew instead as it feels like I'm back at school!




Lesson number 1 - never argue with something Steve says about cars...

Hugh and I learned that one a lonnng time ago!

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#2779 - 15/10/04 08:29 AM Re: Fiesta ST Gear Ratios. [Re: davidChief]
Hugh Offline


Registered: 27/02/04
Posts: 1620
Loc: Warks
You're not wrong Craig!

Quote:

I would rather have a close ratio box anyway. Hitting 60 in 2nd is a bad thing IMO when you only have 150bhp. The only thing it does is reduce the 0-60 time which is itself a meaningless measure.



TOTALLY agree. It's why the pub talk figures piss me off so much. The KA Sports gearbox was altered to improve the 0-60 time, but as admitted by the engineers who developed it, it lost a lot of driveability through 2nd 3rd and 4th as a knock on result. Shame really.

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