Comments by "Golden Croc" (@GoldenCroc) on "AutoTopNL"
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@raiinydayz1889 Yes, I know about the AWD system. Still has more hardware to spin, which robs some power.
Regarding torque, revs and power delivery, those factors are as good as irrelevant to the acceleration numbers. Only average power in between gearshifts count, and that number is often very closely correlated to the peak power number.
In as good as every petrol powered car, shifting earlier, "using the torque", or power delivery rpm mattering at all, are sadly all just effectively long-lived myths that for some reason became popular, but have no basis in reality.
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@Maarten_vd Eeeeh? This is a Dutch channel that tests acceleration performance on the autobahn.... 100-200 is the end all, be all for that. 10-11s for a M3P is an enormous difference compared to the 7.2 of this car, easily 100hp, and a very big percentage. Also, the Golf has a much higher top speed than a M3P, dont know where you got the inverse from?
Generally, you seem to have gotten bad info allround, for some reason?
Especially since you said "cherry picked", when this Golf is faster and quicker in everything, yes, even 0-100kmh. Hope you can find better sources next time?
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@Islam_is_the_truth.4 Well, horsepower is horsepower, doesnt matter if its petrol, diesel or electric.
But I guess this could be geared too short for top speed, putting it into a unfavorable rev range with less power.
Maybe thats what you are thinking of, diesel cars that are geared too short, because if they are in the correct revrange, top speed is identical to anything else, in fact it might even be a bit better with the diesel compared to petrol since it needs less cooling which in turn could enable better aero.
Hard to tell from the video, but it doesnt look too bad, about 4000 rpm which should be ok...I should think.
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@klaspeppar5619 A very good reply, hope you dont mind if I explain some things about what I meant, dont take it the wrong way...
Warning, long reply But I think you will find it worthwhile...
Yes, 250hp is very believable, no doubt about that. But how is the number 250 reached? Most tuning companys dont have the resources to test engines the way manufacturers does. They also have an incentive to inflate the numbers, and little to no negatives in doing so. Many people will buy the tune that promises the most hp increase.
But that also goes for the engine in the Golf of course, since it also is tuned by a tuning company.
That doesnt mean the numbers are untrue per se, but that the variations could also potentially be larger. And if your Volvo makes 260 hp, and the Golf 230, that makes a really big difference in the race, but is still well in the variation, I would say even a 15hp swing per car would be, so potentially 225 vs 265 or 255 vs 235.
As you say, there is also the condition of the car to factor in. A small leak or almost imperceptible misfire, some less than optimal old fuel, a slightly bad MAF and many other such things can sap 20 hp without being noticable, very true.
There is also the definition of what kind of race it would be. Lower weight and power gives an advantage at low speeds, while higher weight and more power gives an advantage in higher speeds, were aerodynamic drag is most important. So it could well be possible to see the lead change several times in the race, as the speed goes up.
The comment you made on the cylinders and torque is interesting, as I said dont take this the wrong way...
Number of cylinders dont matter. At all. They only matter in in indirect way, as in, can the car produce mpre horsepower because it has more cylinders? If the cars have the same horsepower, it doesnt matter they got 1 cylinder vs 12 cylinders, when it comes to speed and acceleration.
Same deal with torque, it matters only in an indirect way, as in can the car produce more horsepower becuase it got more Torque? Sometimes the answer is yes, sometimes the answer is no. But the "peak Torque number" in itself doesnt mean anything when it comes to maximum acceleration. Only "in gear mean horsepower" does, which is a number that is not availible from any manufacturer or tuner as far as I know.
Yes, the DSG gives a big advantage, even though it saps sligtly more power and makes the car heavier than a normal box. But at very high speed, where the shifting is a smaller percentage of the time spent acceleratiing, then the advantage goes back to the manual box, for the reasons stated above (less weight and power loss). VAG themselves used a manual box in their Nurburgring lap record attempt with a Golf or was it a Seat leon Cupra, dont remember, but they are more or less the same car anyway. One or the other.
Yes, indeed it would be very interesting race, too bad I dont have my old tuned BMW 120d diesel, which could have added an extra dimension. But with only about 215-220hp and more losses since it was rear wheel drive, it would surely lose against both this and your car. I also had a BMW 123d diesel with about 270 horsepower, and that would have also been interesting, maybe it would have been slitghly faster.
Currently I have a BMW 335d, but it is tune to waay to much horsepower curerntly for it to be a worthy race for any one of us, though I suppose I could flash the software back to the factory standard of about 285-290 hp, and that would maybe be a bit competitive, since the 335d I have got is very heavy for being a coupe.
Hit me up if you are interested, It could be a fun race. Since You own a Volvo and got the name you have, I take it you are based in Sweden just as me, or am I assuming too much?
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@Morten54 If they care enough to state their opinion in a comment, they should care enough to learn how it really is. And many times, they do, I have been thanked countless times.
The ones who dont, generally are the ones who take being wrong in itself as a personal attack upon them. Its quite sad they feel this way, if you ask me. It benefits no one. Still, true enough, there are many of those as well. Less than the other ones, thankfully.
Now regarding my wording, yes it was indeed not the best. But I make a lot of comments and it get tiresome sometimes hearing the same old myths perpetuated into infinity itself. Especially when people got the tools to understand this in school already as young teenagers, if they think about it a moment before they reply. Its not rocket science.
Lastly: No one (presumably?) is forcing you to read, nor reply to the comments, so that annoyance is easily mitigated. Cheers mate.
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@jimboTTT I could do the math, its not that hard. Problem is we dont have accurate data of all the factors, and I am not fully sure I trust the Cd number posted by Tesla. I dont really trust those numbers by any manufacturer these days, seems to have become a bit of marketing, just like nnurburgring lap times.
Anyway, from the track video of the Plaid, even with its much better thermals than earlier model S version, it seems almost certain it will hit a thermal limit on power before it can reach its true, drag limited top speed, so you are quite right. People dont realise how thermally stressfull it really is to do a true top speed run, it is minute or so of full power...
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@CarsandChris They somewhat did tune the fifth gear to the engines potential, yes. But not fully. It could no doubt do quite a bit higher speed with another, suitable ratio or another gear.
Yes, I am sure everyone knows that it reaches the top speed in fifth, would be very strange if it could do it in sixth with such an enormous step between it and fifth.
A shorter sixth gear would give quite a bit more than 2 mph more, at least 6 mph and possibly 10 or a bit more would be easily acheivable. This is borne out from watching the acceleration of the car in the video, as well as the fact that by pure maths and numers a 530-ish hp car should do 300 kmh quite comfortably unless it got an atypical amount of drag for its frontal area.
I dont agree it was struggling, as in there is no more speed to be had. It is closing in on its top speed for sure, but as I said earlier, with that amount of acceleration seen in this video there is often at least 6 or so mph left until one reaches the true aerodynamic limited top speed.
In the end its mostly academic, just about no one ever pushes their car to their "true" top speed in the end. This fifth gear is a good compromise that is still more than sufficient for even the longest straights on any race track in the world.
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@MrFlazz99 Yes, this in indeed very common since the 1980s in American cars. If I remember correctly the first Dodge Viper for example was geared ridiculously high, with a theoretical top speed of close to 480kmh in top gear, and that was with way lower revs than this Mustang engine as well.
So none of this is new in any way. Having a very tall top gear or two highest gears is not a problem at all for the American market where just about no one goes above 250kmh regularly, certainly not back in the 1980-1990s.
Since then, it has found its way into more and more cars, with a lot of cars now having very tall top gears. My Porsche cayenne for example is also geared for a theoretical top speed of way more than 400kmh, just as this Mustang.
What is a little bit surprising is that they wouldnt make the fifth gear juuuust a little bit taller, but they probably felt the tradeoff in acceleration wasnt worth it for a bit more top speed that as good as no one ever uses. Fair enough, hard to argue with that.
Regarding too low gearing for max top speed, It is often found in diesels, just as your clio, since they have more limited revs. My old BMW 123d could hit the revlimiter in top gear already at stock power, and with just a little bit of tuning it was very easy to do so. Funnily enough, the 120d model with less power had higher gearing, and the 118d with less power again had even higher gearing than that. This was probably because BMW assume the customers buying the stronger engines prioritized acceleration vs fuel economy. Cheers.
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@papugenas Track driving. Thats what these cars are made for. Speed interval about 80-280 kph. 0-100 was a useful metric for testing engine power back in the days when it took normal cars at least 15 seconds or so, which was in the 1970s and earlier.
Thats why it was used. But it is limited by tire grip for decades now. I have never heard of anyone driving 0-100 with full throttle in normal trafic regularly, have you? Better hope that one always is the first car at the stoplights when it turns green, or one will run into the back of the car in front, because most people dont use much power when pulling away.
No, track driving is where its at for those who like to drive, and then you are usually way above 100kph, as I said earlier.
Not that it matters much, cars at this price point rarely sees the outdoors anyway, they are locked up in a multi millionaires garage. A pity, but thats just life.
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@Tafa-Mapa They ones replying to you are mostly, if not completely, correct. The core of their argument is broadly correct, one can say, if not all the details.
Hers the gist of how it is: The only thing that matters for vehicle (or any physical object) propulsion is (horse)power. Power means rate of energy conversion, which is what is happening.
And yes, I am a physicist that also have decades of experience in vehicle design. Not that its needed, the formulas are quite simple and can be easily understood by almost anyone, if they looked into it.
I recommemd doing so to anyone, learning how things truly work is both fun and educational. And can help one make your own vehicle better, if one builds or tunes for themselves.
CHeers mate.
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