440hp Dynoplotted Challenge Stradale

Show the overlaid GT3 RS plot!

 

Just interested but why do you think this?

Quote:

(probably the most accurate facility in the whole of the UK).

Have you had experience of other rolling roads in the UK? The reason I ask is I'm about to use a rolling road for some development work and I'm yet to make a choice as to which one?

Thanks

Bernard

 

I am having a seriously difficult time believing the car is putting down 440whp with intake/cats/exhaust. Some details, please:

Are those numbers SAE corrected? is that a crank estimation, or is it wheel horsepower?

It is highly improbable that you picked up 50hp from a naturally aspirated motor which comes from the factory in such a high state of tune...and even more spectacular considering that the manufacturer power ratings are at the crank, not the wheels, while most dynos show wheel horsepower. That means you have supposedly picked up roughly 65hp from intake, cats, and exhaust.

The GT3 dyno claims you made are also dubious, considering some google searches yield 996 GT3 dyno sheets averaging significantly less than the factory 380hp (which is crank hp). Some cars with modifications were making close to 380whp, and very few made 400+.

Not trying to call you out, but I do think those dyno numbers are optimistic.

 

In my book, that is the whole point behind dyno use.
To give a baseline figure to work from.
That way you know for sure what each mod does to your figures.
Other wise you are just guessing.

 

If they are RWHP (rear wheel HP), then Ferrari's drive train is SO good that it actually increases the engine's output. Perhaps, a magical inertia-multiplyer concocted by Guiseppe in his spare time. NO offense, but if you get 391 RWHP, you should be real happy. I've owned a few F cars and have always been dispappointed by their real (dynoed) HP when compared to what is claimed. I would expect the CS RWHP to be near 380HP (or less).

 

It's obviously not whp... first, he says 'hp' instead of whp. Second, Porsche claims 380bhp from the GT3. If he says it makes 20 more than expected, and it came out to 400, then 400-20 is 380, which is the claimed crank hp.

440hp ain't bad, imagine what the numbers would have been if the CS actually made its claimed horsepower

 

It cannot be wheel horsepower. That should be obvious from the figures...... derr....

Anyway it is the flywheel BHP extrapolated from the wheels.
If the Ferrari was producing roughly 405-410bhp as standard then 25 or so horspower with the COMPLETE tubi exhaust (inc headers) + intake mods isn't too improbable.
Incidentally, no GT3 RS in the entire country (UK) has ever dynoed less than 400bhp.... Everyone knows that Porsche have been conservative with their BHP figures on the GT models. The stock GT3 normally dynos around 390bhp anyway so for the RS engine to produce more than 400bhp is perfectly consistent.

I can confirm that Weltmeister are supposed to be THE premier dyno facility in the UK.

 

and Im certain with Hyperflow flow cats and the Eurotek designs ECU remap
well see 440 BHP. I will also take my Porsche TT along for comparison, which should manage 500 I hope.....

 

Harry,
can you pls post pics of Tubi back box and headers? Is your car the Blk CS i've seen @ Karl's?

 

440hp is alot more then I expected but exhaust manifolds do improve a Ferrari's performance greatly.

 

if any of you guys are interested in purchasing a tubi NGT mine is for sale on ferrariads

 

The word on the street is the stock Stradale exhaust in the ultimate, and beter than afterarket products. I guy that does some work for me trys to buy my stock one everytime I see him.

 

what you need now is to run a standard CS and see whats what! If u have 440 HP, consider it a GODSEND. most US cars prolly have about 380 HP @ the crank.

 

And you know this because ....... ?????

 

15hn this will indeed be my first ever dyno run, should have done it before the Eurotek Designs ECU remap and Hyperflow Cats but I know it will definitely post a significant improvement !

 

...is this really a question? the car routinely puts down about 320 RWHP, would u say that 15% is a realistic drive train loss?

 

As a point of reference I had my CS dyno'd last week. Made 379 at the wheels with NGT and straight pipes.

 

Rennen, thats great! wow, I remember a few guys here were so dissapoited with their numbers, all kinds of stuff was coming up "inneficient transmission" "ram air effect" all seem to be good excuses, maybe urs is SUPER strong!