Within Stock rules???

[MR DERBY CITY]

Originally Posted by Rusty2211

MJ, the Australian School Bus 390's came with the Chevy rods!

I know, I know all about the Aussie school bus with the 390. I have worked on numerous at my shop. The friggin steering wheel is on the wrong side, the Holley carb is waaaay too big for a school bus and when my shop foreman pulled the bus in he about tore off that damn oil pan because it hangs waaaay too low...How about that Mr. Rusty ???

[Bernie Cunningham]

MJ,
Ya gotta love fast school buses in OZ, right ?

[Mike Keener]

I can't see why this thread has gotten so far off topic?

Who gives a damn about the diameter of school bus rods- and what in the world does it have to do with the legality of a COPO engine, which by the rules submitted by GM to NHRA is completely and totally legal?

[Jim Hanig]

Originally Posted by stocker396

New Cars=New Rules??? Those get a 9" diff too but my Chevelle Doesn't!
I am beginning to think that those cars have a different rule book than the rest of us...

I will bet the the "SAM-tech" car gets torn down at the next race as well as anyone affiliated with that program. Just my opinion.

Why would you say that.?

[dartman]

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?

that's funny

[Ed Wright]

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?

Yeah, I wouldn't have told that one. Might have done it. Would not have told it. LOL

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.

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

[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