Dyno question....again!!!!

[greens vauxhall]

Re the link below......

www.evo.co.uk/videos/supercarvideos/204674/ferrari_599_gtb_fiorano_tested.html

Why does fresh rubber appear to make such a difference to the output figures as shown in the video ??

[well_fans]

better grip so less slippage on the rollers, less need to pull the car as tight onto the rollers due to the lower slip - smaller losses from contact with rollers? Just a guess but from seeing a number of rolling sessions now how tight the car is pulled onto the rollers can make a big difference.

[vixpy1]

Its not something i've ever come across, but if the tyres were disintergrating as badly as i've been told, then they might have got some slippage.

[weltmeister]

No slippage apart from Ferrari press office being caught out by putting tyres on the car that had a compound not dissimilar to "Full Wets" this was done to obtain better lateral G numbers and better acceleration times when Evo were testing the car at Millbrook.
The car came & went in a covered transporter with an entourage of 7...

Nothing wrong at all just the tyres were too sticky

Allan

[BO55 VXR]

[doleboy]

BO55 VXR said:

LOL