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Old 07-25-2017, 11:41 PM
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zzrodder zzrodder is offline
It ain't grey hair, it's chrome!
Join Date: May 2010
Location: Beautiful B.C. Canada
Posts: 2,395

Originally Posted by Dr Crankenstein View Post
I wonder how that beast would sound with split exhaust... hmmm?

If you split the exhaust into 1,2,3,4 and 5,6,7,8 - small block Chevy block hugger headers have almost the right port spacing, just weld them to new flanges - you'll have a pretty normal 8 cyl sound.
However, if you arrange the pipes so they cylinders fire alternately into one collector then the other (180 degree firing) it will produce an entirely different sound, more like an Indy car (though obviously not revving that high) or an angry 6 cylinder.... 180 headers produce a broader, flatter torque curve which may play to strength of this kind of engine, not a revver but a puller.
Probably one of the most powerful flatheads made was the Hudson 308 six for one simple reason - it was one of the only inline flatheads I know of to use large individual ports for every valve. Flow matters and makes power. Even the Buick straight 8, though a new fangled overhead valve engine, used crummy twisted siamesed intake ports that severely limited flow.
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