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最初由 eason_c 發表
Why a sport engine must have a high redline?? Theoretically, the larger the Bore-Stroke ratio, the higher the engine will have higher RPM. But what good does a high rev engine make when ur max power and torque comes out at 6k/4K rpm? |
Why must a sport engine have high redline you ask? A sport engine without beautiful sound is like a person without souls. To achieve the best harmonic ear music ideally you should have a high redline V12 breathing behind you. Also a sport engine is suppose to push on further when you rev it that extra grunt you get when you go beyond 6000 rpm. High redline is the only way an engine can make power in naturally asipirated form. Turbo need not to apply because of potential turbo lag concerns N/A engine still provides the finest throttle control.
You are mistaken my friend. I'll give you an example RSX Type S and TSX both share the same K series block. RSX have bore/stroke ratio of 86*86 and tsx have 87*99 from your statement TSX would have higher redline. Which in reality is inaccurate because TSX already run into piston speed problems if you try to raise the 7100 rpm redline. While RSX Type S have a redline of 7900 rpm and it's Type R sibling with same B/S ratio have redline at 8400 rpm but with forged internals. Just remember Bore is indication of your valve area and Stroke is connecting rods. Bore and Stroke tells you the engine characteristic while providing information such as displacement size.
Horsepower is just an indication of how strong the torque is over time. You are suppose to shift right after you peak torque point. There is no point in reving further because after peak torque your engine drops power dramatically. Therefore if you have an engine that makes peak torque in high rpm zone you can take advantage of gearing. You drop out of your powerband everytime you shift while I can stay in the sweet zone through the close gearing. Also the longer you can stay in a gear the better because shifting eats up a lot of time.
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