360 ChallengeStradale Dyno Run III

If we go with 340 HP and assume an approximate 20% driveline loss - that gets to 425HP. So maybe the factory numbers are close?

 

Thomas - I'm taking my CS to the Dyno on Saturday - a stock 360 has previously been Dynoed on the same machine at 311.4 - see the link below.

I'll report back on the numbers I see at the weekend for comparison.


http://www.ktrperformance.com/services/Dyno_Graphs/Other/graph_360modena_stock.htm

 

My friend's 360M with tubi got 225kw=321.5hp on a dyno dynamics dyno. all sounds pretty close.

 

I was just wonderin if 92oct is too low of grade to put in a modena??

 

yes but 20% isn't the drive train loss!

 

Can you buy 98oct in US? 92oct on a Ferrari sounds strange to me, I gess you loose a lot of horsepower using it.

 

<chuckle> Definite F-Chat FAQ... a Euro vs. US confusion... we measure/report octane differently... Euro uses RON, we use (RON+MON)/2... so our "super" grade of gas is 92-94 octane... and roughly equivalent to your 98 or so.

 

Brian,

Not sure if you saw my post on the US/Euro weight difference.

While at the factory I asked what is the difference due to. The answer was US regulations require differences in

1) The exhaust system (we can see that in the photos)
2) The front and rear bumper (they have more material in the US versions)
3) The roof pillars (they have more material in them and the A pillar is thicker

 

The 409 to 425 static vs dynamic is also not all down to air flow but electronics, I guess detecting incraesed road speed and modifying the ECU characteristic. I didn't get a measure of how much is due to air flow and how much ECU response.

Ferrari are certain the figures thay give are right and not made up in any way

 

Im very interested in what's going to happen here, especially robinH's input...my only question though, is that doesn't the HP peak in both cars at 8500 RPM? the torque peak is spot on ayt a claimed 4750 by the factory, but it is confusing to me about the peak power...any answers?

 

Thanks for the frank info. Driveline loss in a standard transmission is generally considered to be in the 12-15% range. The Z06 Corvette generally dynos at about 360 rwhp, the Viper GTS at about 400 rwhp and those cars are rated at 405, 450 hp respectively. 12% loss or less.

From the dyno data it seems unavoidable that the CS makes more like 385 flywheel hp. Perhaps there is some effect of moving air over the car that should help when the car is in motion, but then again the Viper/Vette dyno stationary just fine.

I doubt that anyone buys the CS or most any Ferrari for the hp alone, but someone is kidding to rate the CS at 400hp or higher.

The low weight is really nice to see, though! All of my street cars are more portly than that ( the 355 might not be too bad, but I have not weighed it).

I am very interested in the Noble M12; at 400 hp and 2500 lbs, it sure sounds good on paper.

 

Oh, I did not notice at first, but the fact that this was a Mustang dyno may affect figures a bit - I have heard that the Mustang is a bit lower than a Dynojet, and I have only used and observed the Dynojet.

As for road speed and ECU, where does the ECU pick up road speed? Unless it uses the front wheels, it should detect road speed since the rear wheels are turning.

Seems to me Ferrari is being optimistic about its power numbers. A better calibration is the drag strip. Don't worry about the launch, look instead at trap speeds. The Viper, an aero brick, pulls 117-119 mph typical trap speeds, the Z06 more like 113-115. Given the low weight and aero, the CS should be able to produce trap speeds of at least 114 mph. Not that anyone will defile their CS by braving the drag strip bubbas and ricers, but that would tell a more accurate tale.

 

Like their weight figures? Thomas' car has nothing extra... yet weighs 101# more than the owners' manual says it should... and 279# more than the marketing literature.

 

We really need to get one on a 4-wheel dyno... with a real big fan.
Any 4-wheel dynos in Dallas?

 

Just saying what they said

 

Yeah... what I'd love to see for all cars is 30-120mph times.
Or even 30-60, 60-90, and 90-120. That's the kind of acceleration I do with my cars. And if actual driveline losses are higher in a Ferrari, then that's bad... it means lower times. In the end, HP and Torque numbers aren't too interesting... its the acceleration those get me that is.

 

I disagree that this represents 12% loss, it is more likely to represent 3% more power than advertized (e.g. 417 HP rather than 405 HP).

However, using the more standard 15%. 335/85% = 394 HP so something is still missing.

 

Thomas,

Thank you very much for doing your research and sharing it with us all!! I have to say I am a little disapointed with the 335 HP but very happy to see that the torque of 250 ft lbs is so high. It looks like the torque is about 20 lbs higher then advertised. And that's a good thing

 

The US engine management systems (ECU'S) are set up for US 92oct.

 

I agree that driveline loss is at best a guesstimate and at the end of the day, what matters is acceleration. That's why I suggested a drag strip test.

17-18% seems high, even with revs, but that may be right. But having dyno'd small bore motors in Miatas to 7200 rpm, we still see 105-118 rwhp in a 1.6l engine, which works out to a guesstimated 125 hp or so flywheel, very near advertised numbers for te car and closer in rpm to Ferrari than to Viper.

 

Thomas B: You have an outstanding looking car. Simply stunning but I like red.