WebDec 4, 2006 · So that intake closing becomes 87 degrees for Cam #2. Remember, it's a 317-degree intake; the exhaust stays the same, with a 60-degree closing, making it a 317/330 … WebPerformance Level 1. Level 1 indicates a good stock replacement camshaft. These profiles are designed to enhance throttle response and low end torque in vans, trucks, passenger cars and mild marine applications while delivering fuel efficient motoring. High vacuum, smooth idle and maximum efficiency are characteristics of these cams.

Pontiac V8 Engine History: 1955-1981

WebMar 16, 2010 · That is why Pontiac (and most other car makers) almost always installed a shorter-duration cam in automatic-trans performance cars as compared with their manual … WebFeb 20, 2010 · February 20, 2010, 01:04 PM. Re: cam for 455 Pontiac. Installed wherever, advanced, retarded, can play with that a bit. Idle to 5500 rpm is the power range, the idea is max efficiency by making the most torque possible so the engine doesnt have to work very hard to move the car. Less throttle angle, less fuel used. the pinstripe bowl

Building a Strong Street Machine – Part 5: Pontiac Camshafts

WebJan 10, 2024 · The 1963-1968 Pontiac engines were under-cammed from the factory and used the engine torque for high performance. They were heavy cars and needed low end … WebA camshaft with 301/313 degrees of advertised duration, 0.407-inch (10.3 mm) net valve lift, and 76 degrees of valve overlap was specified for actual production engines in lieu of the significantly more aggressive Ram Air IV-spec camshaft that had originally been planned for the engine (initially rated at 310 hp (231 kW) with that cam), but ultimately proved … WebA camshaft with 301/313 degrees of advertised duration, 0.407-inch (10.3 mm) net valve lift, and 76 degrees of valve overlap was specified for actual production engines in lieu of the significantly more aggressive Ram Air IV … the pinstripe alley