I'll post more when I've got a larger collection of data, I want to get more drivers in on the deal. On previous sessions, at the same track, we've swapped karts between sessions and swapped results, from my friend besting me by 4/10ths to me beating him by 2/10ths, we both set our personal bests for that track in that Kart. It was at TBC in Richmond if that means anything to anyone.Īs far as the other factors that affect lap times, there are many, and sometimes, it is the kart that makes the difference. I also compensated for the warmer tires and other factors that affected times between sessions by finding the average lap improvement from one session to the next for the non ballasted drivers.īased on our (not yet as large a sample as i'd really like) data, in a ~30" lap 12 turn lap, the penalty worked out to. I compared a weighted average (ignoring the slowest 4 laps) of lap times for each session. We each took our assigned Karts through 4, 12 lap sessions, two with added ballast. To keep it simple, we will be looking at Rotax engines and taking regulation minimum weights (for racing) in order to calculate our kart power-to-weight. I weigh about 220 pounds, my friend about 180 pounds, so the ballast represents half the difference. Recently I got a friend to agree to taking turns karting with 20 pounds of ballast. Really ancient forum now, but with insight. So either I'm the second coming of Senna or there's more to it than this However: I used to be about 2% slower than my colleagues when I weighed 115kg to their ~80kg. So Mr Heavy is even further disadvantaged than the numbers above indicate (unless he increases his tyre pressures) because the wheels are effectively smaller for him than for Belatti. This is because the compression around the contact patch reduces the effective radius of the wheel-tyre system, and that compression is larger the more load is on the tyre. (Make sure the tire is properly inflated and in good condition.) The diameter is the radius 2, or in this case, twice the distance from the ground to the center of the axle. Enter the diameter of the drive (power) wheel and tire combination. If you calculate it using pi*d you will get a different (larger) answer to what you get if you roll the bike unloaded, and that in turn is larger than what you get if you roll the bike with yourself on it. The purpose of this calculator is to determine the potential speed of a go kart based on certain data. You do the math to calculate top speed diferenceĬontributing to an ancient thread, but it wasn't me that resurrected itįor bicycle speed meters, which typically measure the number of wheel rotations, you have to measure the roll-out distance of the wheel (how far you travel per revolution) with yourself sat on the bike to get accurate speeds. Raise spindle & reset cross: Slows weight transfer across the kart. We were running a long ratio (10:78) in order to preserve the engine. and go to -3.0 what is the affect If the kart was tight, the kart will now be freer. Belatti wrote:With the same kart he reached 17.100rpm in the straight and I reached 17.500rpm. Modifying the driver pulley: Find out at what RPM does your Engine makes the most Torque Look at the chart above and choose the spring and the weight which.
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