Are 340’s rare

340sFastback said

Short stroke 340s have HEAVY pistons, HEAVY. 4 inch crank small blocks have short very lite pistons. Like I said earlier my 414 revs way faster then my stock 340 ever did. If I stomp gas pedal to the floor the 414 will scream up to 6,000 rpm faster then it takes for gas pedal to go down, like fraction of a second...

Click to expand...

Obviously lighter reciprocating components will help with how fast/responsive an engine is.

Lots of other factors come to play that are also important. First and foremost, for an engine to rev up fast, against the weight of the vehicle, the engine needs to be powerful. Matched gearing and converter stall is obviously extremely important. Other factors such as compression ratio, cam timing etc.

I say the following, ignoring certain extreme examples of course.... We're not talking about RC car engines, and we're not talking about Diesel locomotives here...

Regardless of your bore stroke deck height combo, you're more than able to build a responsive, explosive, high rpm engine.