Performance Calculator

[Furyblade_Lee]

Just did it, 3.75 to 60, 10.1 to 100. 1/4 mile 12.2 @ 110mph. Interesting, as I doubt in real life it would dip into the 12's or sub 4 seconds to 60. But I think it's mainly due to the bike clutch, if I had a massive flywheel to help me launch consistently it could be quite accurate. Guess I will have to visit Santa Pod now....

[Nash]

Lee here are your numbers

Power at Flywheel (BHP) : 150
Weight without Driver (KG) : 440
Power to Weight Ratio (BHP Per Ton) : 346.38
0 - 60 (Secs) : 3.75
0 - 100 (Secs) : 10.16
60 - 100 (Secs) : 6.40
Quarter Mile (Secs) : 12.20
Terminal Speed (MPH) : 109.61
Drag Strip Quarter Mile (Secs) : 12.10
Drag Strip Terminal Speed (MPH) : 110.95

Enjoy ......... Neil

[jeffw]

440-450kg is what Westfield claim for the Megabusa so you would be in the right ball park, some of the RGB Furys are in that sort of area. Is your R1 150BHP ?

[Nogoingback]

That's a bit light more like 550 with driver.

[jeffw]

The calculator works it out without the driver.

[Nogoingback]

The lighter the car or bike the weight of the driver or rider becomes a larger percentage of the total weight so no point without and not much fun either.

[jeffw]

ALL theory performance figures quoted on the car statistic lists are calculated using the Letstorquebhp.com formulas (calculator), none of them are from any given road test. All the figures are THEORY only and the aim of the site is for a fun comparison between all types of performance cars, standard or modified, and mainly in the UK, although some imports are covered.

1) The Formulas used and statistics shown on letstorquebhp.com theory performance web site and calculator, predict 0-60mph, 0-100mph and ¼ mile times (with the ¼ mile terminal speed) for road legal cars on road legal tyres. To check the accuracy of these figures we recommend you compare them to real life road test figures that you may have come across in magazines and sites.

2) It also calculates a separate Drag ¼ mile (with terminal speed and not in relation to the road figures shown) to show the slightly quicker time on a well gripped Drag Strip approved surface. This figure should be compared with real drag strip times achieved at official events (and not the road figure mentioned earlier). They do not allow for none road-legal drag slicks (which can be up to a second quicker on the 1/4mile if not more depending on the drive type).

3) The formula’s only use three items of easy obtainable data to produce the figures, these are Flywheel Power (BHP), Kerb Weight (KG) and Drive type (4WD, FWD or RWD). Formulas do not take into consideration other factors that could also affect real life figures, e.g. torque, gear ratios, aerodynamics, air density, temperature etc, these are not easy obtainable.

4) The 0-60 (and 0-100) quote takes into consideration an average amount of manual gear changes. In real life times can vary if an extra gear change is required before reaching the quoted speed.

5) A “through” 60-100 time is also quoted by subtracting the 0-60 from the 0-100 figure. The real time to cover this segment may well be quicker (due to correct gearing) but the “through” figure shows the time elapsed between 60-100 while covering the 0-100. It gives an indication of a car’s comparison performance once moving, and does not confuse the figures with a different amount of gear changes between cars.

6) Average aerodynamics are used and therefore terminal speed and 0-100 can be slightly out; terminals are based on Power and ¼ mile times.

7) Traction difficulties are taking into consideration for each drive type formula, e.g. 4wd can launch very quickly showing an improved 0-60 (and ¼ mile) compared to Fwd which can suffer from reduced traction off the line.

8) The 4WD formula has now been adjusted (times increased) to allow for heavier cars (e.g. over 1500kg) when launching.

9) Formula’s have been setup to allow for the real possible traction limits of proven cars, e.g. quickest times possible (for the very highest possible power) for 0-60 are set at 2.5secs for 4WD, 2.7secs for RWD, and 4.0secs for FWD, although careful drag suspension setup and legal drag tyre/wheel choice may well be very important to get anywhere near these times.

10) Road/tarmac ¼ mile terminal speed is connected with the quoted 0-100, i.e. if the terminal speed is exactly 100mph then both times should be the same.

11) The calculator has been set with maximum and minimum parameters to stop users entering unrealistic data for the drive type used, to avoid bikes, and none performance vehicles:

4 Wheel Drive (4WD)
Minbhp - 70bhp, Maxbhp - 1500bhp
Minkg - 700kg, Maxkg - 3000kg
Minbhp/ton - 95bhpton, Maxbhp/ton - 1000bhp/ton

Rear Wheel Drive (RWD)
Minbhp - 70bhp, Maxbhp - 1500bhp
Minkg - 350kg, Maxkg - 3000kg
Minbhp/ton - 95bhp/ton, Maxbhp/ton - 1300bhp/ton

Front Wheel Drive (FWD)
Minbhp - 70bhp, Maxbhp - 700bhp
Minkg - 600kg, Maxkg - 2000kg
Minbhp/ton - 95bhp/ton, Maxbhp/ton - 700bhp/ton

12) All formulas were designed with trial and error using research from proven road tests in magazines, this covered various different levels of cars that were used as a basis for setting the formulas, for example, figures from Hot Hatches like the Clio 172, to Supercars like the McLaren F1 were used as a guide. Also results from official modified car events were used as a guide when allowing for very high BHP per ton.

13) We suggest if you're asking us to predict the time of an extreme highly modified vehicle that has a full dog box then, as a rough guesstimate, please minus a few tenths from the drag 1/4 mile that we calculate, e.g. if the vehicle has 800bhp then minus 0.8 seconds from the drag 1/4 mile, if it has 600bhp then minus 0.6 seconds and so on. A full dog box can make a noticeable difference above 60mph, so we hope to have this option supplied with the calculator soon.

[Furyblade_Lee]

I am guessing 150bhp. Sometimes rated by Yamaha at 160 but I know nobody who has dynod one at more than 150. Mine has powercommander and ram-air, and I do have an old dyno sheet for 122 at the wheels