![]() This is a lot to do all at once and takes a bit of practice. Place the ball of your foot on the brake pedal, press in the clutch, with the right side of your foot hit the gas, shift, release the clutch. The goal is to apply the brakes, and downshift with rev matching. ![]() ![]() When downshifting, you need to rev the engine to match the RPM. ![]() If you are shifting up, just move the shifter, when the RPM is close enough, you should be able to slide it into the next gear. This can help to reduce clutch wear and jerking when you let out the clutch. When you rev match, you try and have the engine RPM as close as possible to where it will be after you let the clutch out. There is the RPM you are at when you come out of a gear, and the RPM you will be at when you go into the next (or previous) gear. The one thing both of these techniques have in common is rev matching. Heel-Toe shifting and clutchless shifting are 2 different things. Something to watch for in purchasing second hand car - shift down after pressing the clutch in for a long time. Old cars that 'grate' gears when shifting down (it's more noticeable shifting down) have worn out synchro rings. Commonplace 20 years ago, less frequent now with new gearbox designs and rules. Components were used near their limits and a bad change or two by a driver often resulted in a breakdown and uncompleted race. This is one of the reasons formula one cars of the past were completely rebuilt every race (Thanks. You can save a lot of wear and tear and expense on these parts by 'heel and toe'ing. Worn synchro rings need to replaced - an expensive undertaking.īits of metal and filings from the gears also result from mismatch and may go on to cause further damage to the gearbox. When you din't the synchro rings an gears have to match the speed of the engine and clutch at the same time, normally a function of the clutch when you make a jerky change. ![]() If you are clutchless changing all the time these wear out quickly since you are unlikely to match gear speeds well every time. By matching the engine RPM to the revs in the gearbox, the 'synchro rings' that automatically match the gear speeds in the gearbox for you have less to do. ![]()
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