1969 Pontiac 400-cid Ram Air IV
The Ram Air IV replaced the Ram Air II in 1969. The Ram Air IV used the RA II's camshaft but lift in the RA IV was increased to .520 thanks to the use of 1.65 rocker arms (vs 1.50). The RA IV, like the RA II that preceded it, used round port cylinder heads. The RA IV also used a lightweight aluminum intake manifold that produced a weight savings of 10-15 lb. From 1969 though 1970, the RA IV was available in both A-Body (GTO/Judge) and F-body (Firebird/Trans Am) form. While 1969-70 A-body RA IV production was low (1517) only 102 RA IV Firebirds and 55 Trans Ams were built in 1969. RA IV Trans Am production 'jumped' to 88 units built in 1970. Today, any high compression round port Pontiac (i.e RA II or RA IV) is a highly sought after car due to its low production and superior performance on the street and at the strip. After RA IV production ended, Pontiac continued using its round port cylinder head design in 1971. However, by this time compression had dramatically dropped off, marking the beginning of the end of the muscle car era.
Pre-Woodward Dream Cruise
Wednesday, August 12th, 2009