Re: T56 ?
With the exception of those that launch at 6500 rpm, the only time a manual is vulnerable is while changing gears, so you want to understand what your synchros are doing and try to help them a little. In fact someone that is really good does most of the sychronizing themselves and the syncros just help them a little to make up for slight differences in shaft speed. When you change gears, you want the input shaft and the output shaft of the trans rotating at the same speed or close to it (taking into account which ratio you're after.) The output shaft turns with the vehicle, so you can't control that. But when you push in the clutch or the trans is in neutral, you can set the speed of the input shaft to what ever you want with the engine, especially with the clutch out. When you upshift, let the input shaft coast down to the new rpm it will be at. When you downshift, pop the clutch out in neutral and quickly tap the gas to rev the input shaft up to the new higher rpm it will be at in the new, lower gear. If you use these procedures, you can shift faster and the tranmission will last longer. To save even more time, some people rev the engine in neutral without poping the clutch back out, since the clutch never totally disengages anyway. It's a faster technique, but not as reliable IMO. If you could do all of this perfectly, in theory you would never even need to use the clutch, except when shifting into gear from a dead stop.