RE: New Ford Fiesta ST - official!
Discussion
Onehp said:
Engines with similar swept volume have large differences in engine braking. With swept volume I presume you refer to the compression and expansion of air without detonation? But the throttle body is closed on a gasoline. But friction is directly related to swept volume also. So perhaps we mean similar things but state it differently.
The swept volume comes into it so much because the engine is drawing a vacuum against the closed butterfly valve and this vacuum is not recovered properly (ie getting sucked back up) due to the exhaust valve ultimately relieving it and wasting the energy. The rpm is important as that is the rate this process is happening relative to the speed of the vehicle. The friction really is negligible with all this going on.I've not long realised how similar this new FST looks like current Corsa VXR.
In reference to the cylinder chat, what does a 3 cylinder sound like? This might well be a daft comparison, but a 5-cylinder has a distinctive sound to it and sounds much better than a 4-cylinder. So, in that regard, surely this new 3-cylinder will sound worse than the current 4-cylinder engine?
Just a thought.
In reference to the cylinder chat, what does a 3 cylinder sound like? This might well be a daft comparison, but a 5-cylinder has a distinctive sound to it and sounds much better than a 4-cylinder. So, in that regard, surely this new 3-cylinder will sound worse than the current 4-cylinder engine?
Just a thought.
culpz said:
I've not long realised how similar this new FST looks like current Corsa VXR.
I realise I'm in the minority here, but I actually prefer the rear end of this new one simply because I always thought the previous one was a bit 'cheap supermini'. But that's not saying much and yes it is a bit bland. The front also looks like someone has squeezed the old one causing it's headlights to pop out a bit. On the whole it's not too offensive nor is it a thing of beauty so it wouldn't factor into my buying decision much.culpz said:
In reference to the cylinder chat, what does a 3 cylinder sound like? This might well be a daft comparison, but a 5-cylinder has a distinctive sound to it and sounds much better than a 4-cylinder. So, in that regard, surely this new 3-cylinder will sound worse than the current 4-cylinder engine?
Just a thought.
The move to a 3 cylinder has massively spliked my interest in this car as I do think it'll sound much more interesting. But to answer your questions Culpz, Youtube/Google really can be your friends.Just a thought.
ambuletz said:
disappointed with the rear of the fiesta. it just looks like photocopied the rear of a C-max or S-max and shrunk it's size to fit.
Just what I thought, the outgoing one is quite striking. Not sure how that stressed 3 cylinder engine will take the miles either.Especially given the Focus ST 4 pot engines problems!
VeeFource said:
I realise I'm in the minority here, but I actually prefer the rear end of this new one simply because I always thought the previous one was a bit 'cheap supermini'. But that's not saying much and yes it is a bit bland. The front also looks like someone has squeezed the old one causing it's headlights to pop out a bit. On the whole it's not too offensive nor is it a thing of beauty so it wouldn't factor into my buying decision much.
Just as an FYI, saying that this looks like the current Corsa VXR isn't an insult to Ford; i actually like the look of the newest VXR. I just think it looks a bit too similar in places.The rear, to me, is probably the worst bit. I don't see why it should look anything like an MPV when it's a sporty little hot-hatch. The rest of the car isn't too bad and will probably grown on me. Looks are subjective and there are bit of the previous car which didn't look too great
VeeFource said:
The move to a 3 cylinder has massively spliked my interest in this car as I do think it'll sound much more interesting. But to answer your questions Culpz, Youtube/Google really can be your friends.
That's the bit i'm questioning as to why a 3 cylinder will be better than the 4? I will give it a watch. All-in-all, if they do some cheap leases/PCP offers on these, and i assume that they will, they won't be able to make enough of them. The current models can be had for under 10k now, which is great value, but the potential deals on the new models can be hard to turn down. I'll be sure to give one a test drive for sure.VeeFource said:
The swept volume comes into it so much because the engine is drawing a vacuum against the closed butterfly valve and this vacuum is not recovered properly (ie getting sucked back up) due to the exhaust valve ultimately relieving it and wasting the energy. The rpm is important as that is the rate this process is happening relative to the speed of the vehicle. The friction really is negligible with all this going on.
Indeed. But I still notice a large difference in engine braking between engines of similar capacity, but always lower in the most recent engines. Knowing that much work has been done to reduce friction and improve mpg, I have assumed reduced friction to be the main cause. Could be variable valve timing on modern engines too though. Anyhow thanks for the exchange, back on topic lets hope this new engine is a hoot, it sure has the potential. Onehp said:
Indeed. But I still notice a large difference in engine braking between engines of similar capacity, but always lower in the most recent engines. Knowing that much work has been done to reduce friction and improve mpg, I have assumed reduced friction to be the main cause. Could be variable valve timing on modern engines too though. Anyhow thanks for the exchange, back on topic lets hope this new engine is a hoot, it sure has the potential.
Could be due to the emissions thing mentioned a few pages back (I think it was a Car Throttle article) of having a very small amount of combustion taking place to minimise any oil consumption which sounds perfectly plausible. Even if there were some questionable comments in that artical from an engineering standpoint. Are the differences you've noted between similar swept volume engines mainly between old and new?Ford have put a new video of the ST on YouTube today.
https://www.youtube.com/watch?v=IUfj5O-EpYA
Some of the details look nice and if the few exhaust sound clips interspersed with the audio are genuine it sounds none the worst for losing a cylinder over the current car.
https://www.youtube.com/watch?v=IUfj5O-EpYA
Some of the details look nice and if the few exhaust sound clips interspersed with the audio are genuine it sounds none the worst for losing a cylinder over the current car.
JonJon2015 said:
Ford have put a new video of the ST on YouTube today.
https://www.youtube.com/watch?v=IUfj5O-EpYA
Some of the details look nice and if the few exhaust sound clips interspersed with the audio are genuine it sounds none the worst for losing a cylinder over the current car.
The current car is almost silent from the outside other than the dump of air during gear changes so any noise will be an improvement. That and the ride are the only two negatives I can think of having driven the car for two years.https://www.youtube.com/watch?v=IUfj5O-EpYA
Some of the details look nice and if the few exhaust sound clips interspersed with the audio are genuine it sounds none the worst for losing a cylinder over the current car.
I know it's only a 1.6 turbo but it's must just be an engine which doesn't sound great as none of the aftermarket optins sound decent either imo. Both Peugeot and Mini (Previous Gen) managed to make their engines sounds at least a little bit fruity.
Edited by HJMS123 on Wednesday 8th March 11:44
What about throttle response? One of the most pleasurable sensations of driving is feeling the engine respond instantly to the right foot. Not only do we have an electronic brain thinking about it, and a turbo trying to wake up - we now have to wait for another cylinder to come online before the fun starts.
w824gb3 said:
What about throttle response? One of the most pleasurable sensations of driving is feeling the engine respond instantly to the right foot. Not only do we have an electronic brain thinking about it, and a turbo trying to wake up - we now have to wait for another cylinder to come online before the fun starts.
Will have to spend another 4-5k to get the new Yaris Gremlin to solve that I'd imagine
te buy easily changed. 
w824gb3 said:
What about throttle response? One of the most pleasurable sensations of driving is feeling the engine respond instantly to the right foot. Not only do we have an electronic brain thinking about it, and a turbo trying to wake up - we now have to wait for another cylinder to come online before the fun starts.
The technology can disengage or re-engage one cylinder in 14 milliseconds – 20 times faster than the blink of an eye – to seamlessly deliver full performance on demand.14ms isn't too long to wait...
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