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Old 03-15-2013, 07:14 PM   #2356
Mr. Canoehead
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Old 03-15-2013, 07:34 PM   #2357
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Quote:
Originally Posted by RedRocket View Post
I think all big block Chevys have them, starting with the 348 in the late 50's. I'm pretty sure it was the same for the later 396 and 427.
I think they were called porcupine heads because of the splayed valves.
Thanks! We found it too. But, it was only the pricey 396 of which only just over 200 were made in the Z16 Chevelle and the 427 which is the same basic block. The bubble hood 'Vettes also had the 396.
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Old 03-15-2013, 07:42 PM   #2358
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Quote:
Originally Posted by Gadget Girl View Post

BTW my husband, STRAP, is asking me where y'all got the idea that the 396 had splayed valves?
"What was kept under wraps at Daytona in 1963-and all through the development process-was the cylinder head design. Fewer than 50 of these engines were cast before GM slipped out of racing in January of 1963. The large-diameter valves were canted, causing them to stick out at odd angles, thus leading to the engine's nickname: Porcupine."

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Old 03-15-2013, 07:43 PM   #2359
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W Head ..

It is referred to the W system valve train, It is the big block Chevy valve arrangement from the 1958 348 to the late 8.0 that died in 09 if remember, It did not live through the reorganization of GM .I have been lucky to have been able to work on most variants of the big block Chevy. It is interesting that when you look on line to prove its splayed valve arrangement, It is not stated as such. So here is a picture




And some wiki

http://en.wikipedia.org/wiki/Chevrolet_Big-Block_engine





The guys who built the Motus engine are the same, many time winning Le Mans Corvette's engine suppliers, They know this valve train better than anybody else. They had a huge chunk of GM money behind them and the chassis builder of said Corvettes is also building the Motus chassis. The fact that they are selling this bike for a $40,000 is great. Try and buy anything that has such great race pedigree from say Mc Laren or Ferrari.

Some of that cars compliments, for those who do not know the history of the players behind the Motus.

http://en.wikipedia.org/wiki/Chevrolet_Corvette_C6.R
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Old 03-15-2013, 07:58 PM   #2360
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Quote:
Originally Posted by waveydavey View Post
"splayed and canted valves"

why the venom??
I'd like express my regret for the venom spew.
I went for about a 170 mile ride today and remembered what's important and why I care about motorcycles.
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Old 03-15-2013, 09:10 PM   #2361
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http://en.wikipedia.org/wiki/Chevrolet_Big-Block_engine

Here is a much better explaination of the history of the big block Chevy V-8. The W valve train ended in 65 when the new big block 396 was introduce. The type heads shown in Hog Riders post were used on ALL big block motors after their introduction in 1965. I've bought plenty of industrial 454 Chevy engines to power irrigation pumps over the years and I've owned a few Chevy pickups with 454's. They all used the type of head pictured. It has canted, splayed valves.

Look, I'm a motorcycle enthusiast and I hope Motus succeeds but you cheerleaders really need to quit blowing smoke. There isn't any new, groundbreaking technology here, 160 hp from 1600 cc isn't a big deal. Now if they can keep it down around 500 lbs, this sucker should be good for some real giggles.
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Old 03-16-2013, 07:10 AM   #2362
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I'm surprised anyone is holding the Motus engine up as some kind of technological marvel. I admit the amount of engineering it took to produce it ( if they ever do ) is impressive. But what they built is a 2 valve pushrod water cooled V4.

This is 2013 not 1960, and I don't see the pushrod Chevy inspiration as anything to brag about.
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Old 03-16-2013, 07:43 AM   #2363
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Quote:
Originally Posted by JSharp View Post
I'm surprised anyone is holding the Motus engine up as some kind of technological marvel. I admit the amount of engineering it took to produce it ( if they ever do ) is impressive. But what they built is a 2 valve pushrod water cooled V4.

This is 2013 not 1960, and I don't see the pushrod Chevy inspiration as anything to brag about.
It seems like a safe bet though, doesn't it? I mean, look at the US population. We like V-twins that are really cutting edge steampunk technology. NASCAR is a massively profitable sport where people watch pushrod v8's that haven't been in mass production here for... decades now?
We seem to have moved from innovation in the early 20th century to nostalgia.
And if you go to a car show, you'll see half a million pushrod Chevy v8's there in cars at various levels of restoration. Most built with bolt on parts and low degrees of engineering.

So, maybe Motus hasn't necessarily made the best move for a breakthrough, they seem to have nailed what Americans are and will buy at this point in time.
Granted, most of us trust our commute and family hauling to high tech gizmo engines, but when we play on our toys we like to use the wayback machine.
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Old 03-16-2013, 07:44 AM   #2364
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Old 03-16-2013, 08:02 AM   #2365
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Quote:
Originally Posted by JSharp View Post
I'm surprised anyone is holding the Motus engine up as some kind of technological marvel. I admit the amount of engineering it took to produce it ( if they ever do ) is impressive. But what they built is a 2 valve pushrod water cooled V4.

This is 2013 not 1960, and I don't see the pushrod Chevy inspiration as anything to brag about.
Wow , I have been reading this thread thinking exactly the same thing. I think the cheerleaders dont know any better. $40,000 could buy a hell of a lot more bike than this. Dont get me wrong , I hope they succeed , but I wouldt buy one.
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Old 03-16-2013, 09:21 AM   #2366
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I think it's just misplaced, or bad wording. Sure maybe the KVM4 isn't the latest whizbang technology, but what it IS, is time proven reliable, dependable, easily maintained technology. Installed in a motorcycle!

I do all my own maintenance and frankly checking/adjusting valves gets old when you own 4 bikes and quads etc. Ever done a valve adjustment on a VFR? ST?, Concours14?

I loved my Kawasaki MeanStreak, that bike had hydraulic lifters and shaft drive. Talk about low maintenance. Change the oil once a year and ride.

I still want a chance to own on of these.
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Old 03-16-2013, 09:24 AM   #2367
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Quote:
Originally Posted by kraven View Post
NASCAR is a massively profitable sport where people watch pushrod v8's that haven't been in mass production here for... decades.
Aren't most of the American made high power cars push rod?
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Old 03-16-2013, 10:16 AM   #2368
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Quote:
Originally Posted by bk brkr baker View Post
I'd like express my regret for the venom spew.
I went for about a 170 mile ride today and remembered what's important and why I care about motorcycles.
best therapy around.
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Old 03-16-2013, 01:24 PM   #2369
kraven
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Quote:
Originally Posted by Kafn8td View Post
Aren't most of the American made high power cars push rod?
Ford has been using an OHC v8 since 91'.

I guess you're right, since GM and Chrysler's stuff is pushrod.

Most don't count Toyota, I guess.
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Old 03-16-2013, 01:26 PM   #2370
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Quote:
Originally Posted by bk brkr baker View Post
I'd like express my regret for the venom spew.
I went for about a 170 mile ride today and remembered what's important and why I care about motorcycles.
Dood, fuck 'em if they can't take a joke
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