Quote:
Originally Posted by NISFAN
Lol, as you keep banging on, horsepower is the true measure of engine capability  ......said tongue in cheek, of course, torque delivery is an important factor, but the engine we are talking about is smaller than an s65. Bigger displacement allows you to be more tactical about torque delivery throughout the rev range. |
Yes when it comes to absolute performance capability, hp (to weight ratio) is the key metric that tells one more about the performance than any other metric. And in the exact same breath the engines torque curve (equivalently power curve but easier to see in the torque curve) is a key measure of an engines character. I don't buy the larger displacement article. Large displacement engines without advanced electronics, advanced variable valve systems and an advanced head and intake tract can not maintain torque at high rpms. Sure more displacement = more torque but that isn't what you've claimed.
Quote:
Originally Posted by NISFAN
Well that hasn't gone well for you, the M3 GTS is 450hp from 4.4 litres or an even lower 102hp/litre. The CSL version s54 has minor upgrades (induction system, exhaust manifold, cam profiles), same internals. ......a lightly breathed on engine like the CSL itself. |
If you want to obsess in specific output sure, however, I argue a more holistic approach to an engines character and superiority. Even just on the electronic side the ECU in the S65 is capable of 200 million calculations per second, that in the S54 - about 25 million. That combined with the advanced ion knock detection built into the ignition coils in the S65 take its electronics so far past the S54 and make it look a bit primitive. Also a bedplate block as mentioned in the prior discussions, made from the same aluminum alloy in the sam facility as that which makes their F1 blocks. What's in the old S54 - a good old fashioned cast iron block... The same comments about torque curve as the vs. Boss 302 Laguna Seca apply to the S54 (not nearly as broad nor flat).