CLASS RACER FORUM - View Single Post - GM Releases 2013 bogus HP ratings at PRI show

Andrew Hill · 12-06-2012, 02:22 PM

Here's all 3 listed with flow numbers
http://www.thefordsource.com/store/p...-6049-Z304.pdf

"Intake port volume as cast: 204 cc"
"Exhaust port volume as cast 85 cc"

In the Stock/Super Stock Cylinder Heads Volume list, both Z304D and Z304DA are listed with:
Intake CC's Max: 230
Exhaust CC's Max: 91

All have CNC'd combustion chambers, M-6049-Z304P has CNC ports as well.

Also, the engine blueprint guide has a 56 cc combustion chamber, while a 63 cc one is listed in the specs. What's the deal with that?

How can I go about getting an extra 26 cc's on the intake and 6 on the exhaust approved?

12-06-2012, 02:22 PM	#6
Andrew Hill Senior Member Join Date: Mar 2008 Location: Chicago, IL Posts: 701 Likes: 446 Liked 174 Times in 39 Posts	Re: GM Releases 2013 bogus HP ratings at PRI show Here's all 3 listed with flow numbers http://www.thefordsource.com/store/p...-6049-Z304.pdf "Intake port volume as cast: 204 cc" "Exhaust port volume as cast 85 cc" In the Stock/Super Stock Cylinder Heads Volume list, both Z304D and Z304DA are listed with: Intake CC's Max: 230 Exhaust CC's Max: 91 All have CNC'd combustion chambers, M-6049-Z304P has CNC ports as well. Also, the engine blueprint guide has a 56 cc combustion chamber, while a 63 cc one is listed in the specs. What's the deal with that? How can I go about getting an extra 26 cc's on the intake and 6 on the exhaust approved? __________________ 3207 D/SA, C/ED Last edited by Andrew Hill; 12-07-2012 at 10:34 PM.