550 vs 575 max speed.

Ran my car on a dyno which is calibrated to over 300kmh today. Top speed on the 550 is 306kmh limited by revs.
The factory speedo is optimistic as is the rev counter.

 

Having just watched the clip posted earlier in the thread (1.016 seconds) difference in the lap times....I'm kinda left wondering why the hell I bought a 575, when I actually liked the 550's styling better anyway & there's bugger all difference in the performance ???

Seb

 

Updated interior,which is honestly far more attractive and IMO much nicer styled wheels, other than that, why indeed.

 

Put the modular wheels on a 550 though and you've got a very nicer looking exterior than the 575 I think ? - The interior is indeed less fussy in the 575, but nothing you can't live with out.

Seb

 

Your asking the wrong person here. I love my 550 and wouldn't change it for a 575, even as a swap.

 

Thanks steven for the info (though you probably didn't put your car on the dyno for us
But the question remains open, does the 575 achieve the quoted 326 kph ?
Are all "regular" ferraris overrated on top speed (350, CS?, 456, 612 etc).

Also, if the car hits 306 kph rev-limit, back wind won't help moving any faster, though driving against the wind could still make it somehow slower.

 

Gearing on the 575 is identical, but the rev limit may be greater, I'll check today.

 

There are sooooooooo many factors that can effect top speed.....
Espcially when we're talking around 200 mph like here.
Tire pressure, wind, temp, humidity, driver, track etc....
The same car can vary many mph on a different day, remember that.

 

True, but you can't go any faster than the engine can spin the tyres....
Bottom line is the Ferrari owners manual is BS, as I suspected.
car will do 188-192mph depending on tyres used. Any more would require non standard tyres or modified ECU. I doubt a standard car could push the extra revs anyway, as power is already sharply falling off after 7000rpm.

 

Well they say 199 for a 550 right? So 192 is damn close....and with a little help from nature, IE, tailwind, nice temp, no humidity those extra 5 mph are doable.

 

Again, no !
Tailwind can't help for that !
Temp is the same, as it could raise somehow hp, but it's only useful if the car doesn't run out of revs (as it would mean the battle against all sources of friction is lost by too low hp).

 

I'm surprised Ferrari publishes such bogus numbers in the first place. There is a thread here about a European ownersung Ferrari because of exagerated claimsforhis 360CS. Fortunately for Ferrari, it isn't legal to exploit these sorts ofspeedsin the US, so they are relatively safe fromthis source of litigation.

 

Didn't Road & Track or Car & Driver actually test a 550 to over 194+ mph if I recall?

 

If it did, it wasn't standard. The AMS test resulted in a 190mph top speed and also the slowest car to get there out of the cars tested.

 

Humm as far as I recall it WAS 100% stock. It was for some high-speed endurance test. Anyway, weither it's 190, 192, 194 or 199 mph......it's still damn fast lol.

 

100 lbs less weight

30 more hp

15 more lb-ft

Should do the trick.. even so, does anyone see that the 575 appears to be lower to the groud? Lower drag efficient = higher top speed. Look at the gap between the tire + wheel well, then bottom of the door frame to the ground. Looks higher on the 550 to me.. but maybe I am just crazy. Whether those minor adjustments will increase top end by ~ 10 MPH, I don't know, but there seems to be some confusion between about the top end.. could be less than 10.


(This info was based on a '98 550M and '02 575M www.fast-autos.net )

 

The 575 is heavier than the 550, not the other way around, notthat this is relevant to top speed tests.

 

1998 Ferrari 550 Maranello
http://www.fast-autos.net/ferrari/ferrari550.html

Curb Weight : 3918 lbs

2002 Ferrari 575 Maranello
http://www.fast-autos.net/ferrari/ferrari575m.html

Curb Weight : 3815 lbs


The ball is in your court, sir.

 

Kerb weight (no fuel) of 550 1690kg, 575 1730kg, extra weight mostly attributable to F1 shift.
You have quoted the weight of the 550 with a full tank of fuel, with a 575 with no fuel.

 

And again, if car hits top speed at the rev limiter, neither extra weight, nor aero can change the speed, as it is limited by the engine speed.

 

Surely if the cars hitting the limiter,it's got more to give,
Would putting bigger wheels on increase the top speed?

Marco

 

On the 550 power is falling away quite rapidly by the rev limiter, so no. This also explains why in the AMStest it took solong to get totop speed.

 

If you can show me proof that a 1998 550 M weighs more than a 575M on a credible web site or some form of evidence, i'll believe you. Both have to be 6spd models by the way.. because so far, I haven't seen "3918 - with fuel" yet. 99% of all weight measurements are dry, unless they say otherwise.. (like boats)

How does weight NOT increase top speed..? Think about it.. A lighter car with the same amount of power is obviously going to accelerate faster.. would you not agree to that? Could it not also have a higher top speed?

 

How about the owners manuals? How about Ferrari themselves www.ferrari.com ? How about the fact I've had my car on corner weight scales. Before making such asinine comments you would do well to actually RESEARCH the info you are posting, particularly after an owner corrects you.
Oh boy www.ricepower.stupid.com says a 911 has 1000hp it MUST be true LOL.
Your comment on weights is BS too. Most car weights are now quoted to EU stanard which includes 80% tank fuel, driver and allowance for luggage. Ferrari of course doesn't follow the accepted standard in doing this....
Weight impacts acceleration, not top speed, this is a function of aerodynamics and power.

 

Chill guys....message board remember!

What is this "AMS" anyway?

By the way, the 550 that was tested by Road & Track was 100% stock drivetrain wise, 194 mph.