上波問題@@!

Technically, anytime you can switch. It really depends on your car to determine the BEST time to do so.

Redline indicates the maximum limit for SAFE engine operation. Usually your car's computer will cut off your fuel or ignition when you reach pass it.

2007-08-08 23:45:26 補充：
通常引擎設計，當指針剛到紅區前時之扭力輸出最大That is incorrect. 99% of engines are not designed that way. Usually when a person shifts at redline, the RPM will drop near the max torque.

2007-08-09 11:43:36 補充：
咁姐係..要係紅區前轉波....越接近越好?Only if you want max power and drive fast. You will also burn more fuel doing so.

先解釋轉數錶上之資料，紅色個位以後代表紅區，通常引擎設計，當指針剛到紅區前時之扭力輸出最大。指針繼續上至將到達盡位時，會有約一秒暫停，這就是引擎之最大馬力輸出，再上就隨時會爆引擎。如果保養較差之引擎，其實在紅區內亦都有可能會爆引擎，這點要特別注意。最大扭力輸出並不代表等同最大馬力輸出，因馬力是由扭力乘以轉數而來。但扭力輸出是我們判斷汽車好壞之最重要指標。當我們明白了如何觀察引擎之表現，則可因應引擎表現來轉波。如果想部車快跑，則要盡可能接近紅區時轉波(即最大扭力時轉波)。如果想省油，則約於2500至3500轉轉波(視引擎容積，細車就在3500轉，大車就在2500轉)。當然由最省油點至最大扭力點之間，任何位置都可轉上波檔。