Within Stock rules???

[Tony Corley]

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?

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?

[Peter Ash]

Originally Posted by Tony Corley

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?

After publishing their sneaky bits, they should get to experience an immediate and thorough looky loo!

[Tony Corley]

[QUOTE=Peter Ash;499395]After publishing their sneaky bits, they should get to experience an immediate and thorough looky loo![/QUOTE

Still willing to bet they will be just fine if they do.

[Dan Fahey]

These engines are 1970 Pro Stock Engines!

[Tony Corley]

Originally Posted by Dan Fahey

These engines are 1970 Pro Stock Engines!

They are way more advanced than that, lol

Originally Posted by Dan Fahey

These engines are 1970 Pro Stock Engines!

Those engines are complete junk compared to what these cars have now. the 1970 pro stock engines were warmed over passenger car engines. Very good for the time but nothing compared to what these cars are coming with

[Dan Fahey]

Originally Posted by Todd Hoven

Those engines are complete junk compared to what these cars have now. the 1970 pro stock engines were warmed over passenger car engines. Very good for the time but nothing compared to what these cars are coming with

Bill Jenkins engines were massively modified.
Hardly warmed over!
Custom Tunnel Rams which look like todays COPOs.
The Cylinder Heads were cut and welded together.
Special Alloy Pistons..Rods...cams and stable rocker systems.
Systems to reduce parasitic drag such as dry sumps.
Stuff we all can buy right off the shelf!
The 327 cuin was about the largest SBC engine to make power/weigh with back in those days.
No magic because the principles to make power then the same today.

One exception; the Big Three used a clean sheet of paper to incorporate all the best stuff developed in the past.
Even that stuff is not perfect enough to get another half second of power.
Super chargers and turbos were after thoughts.
Today they are integral as and entire designed package.
Supercharged B/G cars with huge Superchargers are today's Supercharged Super Stockers.

Just with 40-50 years of technology packaged and reclassified!

Originally Posted by Tony Corley

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?

what makes you think that the heads are not the best they can be right from GM? Why would you have to start with a new head anyway? These cars were build in a max effort capacity to begin with by a company that has every resource.

[Rick Leininger Jr.]

Originally Posted by Todd Hoven

what makes you think that the heads are not the best they can be right from GM? Why would you have to start with a new head anyway? These cars were build in a max effort capacity to begin with by a company that has every resource.

Then why do all the newer combos (COPO, Cobra Jet, Drag Pak) go quicker when "gone through"?

[Bill Diehl]

Originally Posted by Rick Leininger Jr.

Then why do all the newer combos (COPO, Cobra Jet, Drag Pak) go quicker when "gone through"?

Blueprinting