Just trying to get Opinions on both kind of karts. About the speed and torque or take off speed and top end speed. I have asked about this before about what people think of kart. But would like a opinion of people who have run both for a comparison ?? Thanks K1 Racer
It is an irrelevant question if you intend to race. You need to stick to the package that is run at the venues you intend to race at. LO206 is nationally run and the more likely package at most venues. However, there are a handful of track with Tilly classes and if you are near one and don’t intend to run regional or national stuff the Tilly would be more fun to drive.
If you are just laying down laps for kicks, the Tilly has a bit more oompf to it.
The Tillotson for sure makes more power but rpms also has a huge advantage when it comes to speed and acceleration. I’ve ran both and I like the speed of the Tillotson much more and this was before they added a 1000rpms more to the rev limiter. I run the Lo206 because there is more competition and more opportunity to race.
Here’s a more technical explanation. Let’s say both engines have the same gear ratio, a 4:1 at 6100rpms with an 11in tire is about 49.9mph at 6500 it’s 53.2 and at 7500 it’s 61.4 which means it’s a little more than 10mph with the same gear ratio.
You can also flip this around to understand the difference in power. I can’t rememeber the power figures exactly of both engine but let’s say the Briggs makes 10ft-lbs torque and the Tillotson is 12.5ft-lbs. That power is multiplied by the gear ratio in this cause x4:1 which is 40ft-lbs vs 50ft-lbs. If you made the Tillotson run at the same mph as the Briggs at 49mph, which would be about 4.9:1 gear ratio, the Tillotson then has 61.25ft-lbs of torque at the tire. That’s more than 20ft-lbs more torque for the same top speed. If both karts weight 365lbs that about 9lbs per foot-pound for the Briggs and 6lbs per foot-pound for the Tillotson at the same top speed.