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I read that article...very true. On the other hand, Corvettes are the Buicks of the sportscar world...there are other sportscars that corner better than a vette...
 

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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!
 

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Are you saying that they gained weight or that they are light like the SV. Neither are near as light as the SV, which is why I brought it up.
 

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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.
 

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One Word...Torque

As a Bueller I gotta tell ya, 85 lb/ft at the rear wheel between 2000-7000 RPM is a hell of a lot of fun. 150 lb/ft without having to rev it to 12 grand sounds good to me.
 

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Why not a V4?

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!
 

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Discussion Starter · #29 ·
Re: One Word...Torque

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.
 

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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.
 

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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.
 

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"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.
 

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Discussion Starter · #33 ·
Uhh, ain't that a V-max?

Circa 80s technology, makes ~120 hp. Big-fast-ugly-Mofo-of-a-cruiser.
 

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Ah, doesn't NASCAR *require* a pushrod engine? OHC isn't allowed, which is why you don't see any in the series. It's not because they are "easier" to modify.



NHRA? I don't know for certain, but I thought that Top Fuel also mandated pushrods. True?



Of course, where we really see pushrod dominance is in F1...



-- Michael







 

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The drysdale V8 has a displacement of 750 cubic centimetres and can run at 18000 rpm. Haven't you guys heard of the bos hoss?

http://www.bosshoss.net/

Engine: ZZ4 502/502 CI GM Crate Motor

Horsepower: 502

Carburation 850 CFM 4-barrel

It has so much torque and hp that it does'nt need gears!
 

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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.
 

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How about that guy in England who put two KZ1000 cylinder blocks on one crankcase? He did a fantastic job of it, too. This is the same guy who builds custom 5 cylinder Kawasaki two-strokes, as well.



Anyone got a link for it?



 

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Re: Uhh, ain't that a V-max?

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!
 
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