CLASS RACER FORUM - View Single Post - 1973 Pontiac Firebird Formula 455-SD

Paul Ceasrine · 08-13-2013, 06:57 AM

Original Plans for the 1973 SD-455

* Camshaft #041 = .470"/.470" Lift ~ 308*/320* Duration ~ 87* Overlap

* Aluminum Intake Manifold

* Solenoid Activated Vent-Slot Opening for Hood Scoop

Though EPA Emission Restrictions wouldn't permit it, but with the desired
10.25 - 1 Compression Ratio the 1973 SD-455 could put out 370 HP.

08-13-2013, 06:57 AM	#26
Paul Ceasrine VIP Member Join Date: Apr 2009 Posts: 2,546 Likes: 0 Liked 10 Times in 10 Posts	Re: 1973 Pontiac Firebird Formula 455-SD Original Plans for the 1973 SD-455 * Camshaft #041 = .470"/.470" Lift ~ 308/320 Duration ~ 87* Overlap * Aluminum Intake Manifold * Solenoid Activated Vent-Slot Opening for Hood Scoop Though EPA Emission Restrictions wouldn't permit it, but with the desired 10.25 - 1 Compression Ratio the 1973 SD-455 could put out 370 HP. Last edited by Paul Ceasrine; 08-13-2013 at 07:01 AM.