Quote:
Originally Posted by Peter Ash
Stock Cars Section 10A, page 3
CYLINDER HEADS
Porting, polishing, welding, epoxying and acid-porting prohibited.
Combustion-chamber modifications prohibited
External modifications prohibited.
and from the article "http://www.enginelabs.com/engine-tec...liminator-ls7/"
“The maximum intake port volume we’re allowed is 275cc, so we milled down the intake flange surface to shorten up the length of the port just slightly. This gives us some extra room to touch up the short-turn radius, bowl, and valve job area and increase the cross-section a bit without exceeding the cc limit,” Judson reveals.
hmmm?
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The heads come from the factory cnc ported. When you can start with a bare, unported version and run your own cnc program, you can make it virtually undetectable. If you read my statement, I said those guys are smart, and I would bet money it would pass teardown. And if it can pass teardown, then it must be legal, right?