If you cut the small block engine's dimensions by half, the cubic volume of the smaller engine, hence potential displacement, is just 1/8 of the larger engine. Forgive me if this is the umpteenth similar response. Just do the math: 30x30x30 block = 27,000 cubic inches. 15x15x15 block = 3375 cubic inches. Your half size engine should also weigh 1/8 as much, or 50 lbs. So what you end up with is a 50 lb, 50 cubic inch engine that makes 25 hp!
However, if you compare any actual race car (like Formula One) instead of a street car to even a GP bike the GP bike would lose. Cycle World did this a while back with a Formula One car vs. Nicky Hayden's AMA Superbike and the Formula One car kicked its ass, plain and simple.
I gotta problem with the geometry here...reducing the linear dimensions by a factor of 2 will reduce volume by a factor of 8.
So you'd get a 50 cubic inch engine...you're not gonna get those HP and torque numbers with an engine like that without some serious revs.
Why not just chop off the four rear cylinders? I'm not sure you'll get 1/2 the power from a V8 that's 1/2 the size of the original. you still have the same number of friction surfaces for one thing... (Kevin Cameron where are you when we need you?)
But cutting the motor in half will maintain 1/2 the power and torque for sure , assuming you can tune the intake and exhaust sufficiently, and it'll weigh 1/2 as much. It's size would be 15x30x30 though, pretty hefty for an ordinary bike but what the hell.. go for it!
A hiyabusa from 3k RPM (idle, basically) and up is producing 80 ft/lbs of torque. The myth that I4s are not "Torquey" is bull*****, the I4 hypersports (GSXR-1K, Hiyabusa) have huge amounts of torque over the entire revv range.
However, an F1 car has enough downforce to run an upside-down track. I could be wrong, but I think I remember that the times for Superbikes at Laguna Seca were faster than the times for the GTS type cars. I forget what series they run in but they are the race versions of the Viper, Corvette, Saleen, etc. Wonder if there's a way to effectively make downforce on a bike.
Though you might not get into triple digits through a corner on the street, up in the mountains I have found myself going through "slow" corners at twice the speed li..recommendation. So you can, in a sense.
"Corvettes Buicks of the sports car world"? I think you are being unfair to the Corvette. The latest versions compare favorably with other makes, especially in handling (I think it posted a higher skidpad value than the Ferrari 360) and car magazines hold it in high regard.
I'll wait to see how well the new Triumph cruiser engine works. It won't be a V-8 but it should behave very much like a downsized small block. Should be relatively compact, lightweight and torquey as hell. Lots fewer moving parts too.
What do you mean ugly? The VMax is a classic that can still thrill. Can be made to handle if you want. Feels furiously fast and can be built to scare. Garners much cred in the real world. Never gotten more attention from a bike. And it sounds like a v-8 votrod taking off!