![]() In the real world, your car will want slow a little due to friction, so you will need a slight amount of acceleration (gas) to maintain constant speed. In an ideal scenario where friction could be ignored, this would mean you wouldn't need to accelerate. If you have tires of equal width, and the weight balance of the car is 50:50, then you will want to maintain constant speed through the turn. ![]() I don't know if there is a rule of thumb in this situation, however you do need to transfer weight to the rear of the vehicle so that there is more weight on the rear tires, and the means by which this is done is acceleration. Due to the fact that there is considerably less weight in the rear of the vehicle, the rear tires will start slipping before the front when experiencing the same forces. To do this requires accelarating to effect the requisite weight transfer.įor a pickup truck, you have a different situation. ![]() You want 60% of the weight on the rear tire on a turn, and 40% in the front. As a result, the front tire will start slipping earlier than the rear if both are experiencing the same force. In the middle of a turn, you want to maintain traction so that no tires start slipping.Īcceleration performs a bit of a weight transfer - under acceleration, weight shifts towards the rear, and vice versa for deceleration.įor a motorcycle, the contact patch of the rear tire is larger than the front. Popping on deceleration is due to unburnt fuel ignited in the exhaust. This is because the reaction time is taken as a constant, and distance speed × time. You do not hear this on a bike with a stock exhaust due to baffling of the exhaust. It is important to note that the thinking distance is proportional to the starting speed. The popping sound is from unburnt gas in the exhaust that is ignited by the heat. That said, the physics depend on the vehicle. Causes and Cures for Popping on Deceleration Fix My Hog Popping on deceleration is due to unburnt fuel ignited in the exhaust. A motorcycle that backfires when you let off the throttle is running too lean. The noise doesn't happen in neutral, or when revving the bike or accelerating, only when decelerating in gear under load with the throttle closed. Exhaust leaks can cause decel pop, make sure the exhaust is sealed completely at the motor, and at any other connections. On a side note, this is a good technique (late apex) for regular driving as well, as it lets you see farther through the curve, giving you greater response times in the event of something unexpected. The noise will slow down as the bike slows down, but it seems to be more speed dependent rather than RPM dependent (although it's hard to tell). This is taught at nearly all motorcycle road racing courses, and if you watch racing, you can see it in action. I kind of like the noise.Fastest way through a curve is late apex - brake as late as possible turn sharp shortly after the apex and hit the gas. They also told me to get away from popping they could put stock mufflers on it. I have had great success with this dealership over the past four years plus. I even mentioned other exhausts or air cleaner. I was just surprised that nothing else can be done. They told me it was the nature of the beast with after market pipes. They might be able to tweak it a little but it would always be there. Took it back in and they took it out for a test ride and said the noise is from the after market mufflers and no matter what they do this will always be this way. Took it home and noticed the popping did not go away. About two weeks later I took the bike in and they put a Big sucker air filter on it and did a down load on it. More like a muffled popping each time I down shifted. When I took it out for a test ride I mentioned to the sales rep about the deceleration popping. Bought a 2014 Soft tail Heritage about 8 weeks ago. ![]() ![]() ![]()
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