In addition, because of the aluminum construction, the RHS heads are lighter weight and have a reduced chance of detonation.
Smaller chambers equals higher compression which equates to more power. Chevy Small Block 262-400ci 1955-98 Note: In order to use these camshafts in 1955-57 265ci blocks, it is necessary to machine a small groove in the rear main journal of the cam to allow oil flow to the top of the engine. The RHS heads not only offered more flow but also smaller combustion chambers. The upgrades not only dramatically increased the SBCs peak power but also the power output throughout the entire power band as well.įocusing on the impact made by the choice of the right heads, Richard explains the considerations made, on top of flow numbers, in the planning stages of the build. The engines next run on the Dyno proved the teams efforts to be fruitful, with 414 HP and 415 Lb-Ft of torque. 490 lift, 230/236 duration, and a 110 LSA, RHS aluminum heads, and a dual plane high rise intake manifold. The team removed the L82 cam, heads, and intake to make way for the the Comp XE274H camshaft with. With a baseline established it was time for the upgrades. Run on the Dyno in the stock configuration with long tube headers it produced 313 HP 5,400 RPM and 355 Lb-Ft of torque 3,800 RPM. 450/.460 Lift and 222 degrees of duration. It also offered a healthy at the time camshaft with a. It featured a 9.0:1 compression ratio, cast iron 882 heads, and a Quadrajet induction system. This particular small block is an L82, the performance 350 offered in the Corvette from 1973-1982, prior to the introduction of Chevys fuel injection engines. Richard first installed a 350ci SBC on the Dyno.
Comp cam 350 sbc chevy marine upgrade#
Even though the upgrade test conducted does include a camshaft and intake upgrade as well, the main focus is the role a good set of heads plays in making real power. To demonstrate the importance of choosing the right cylinder heads, Richard Holdener teamed up with Comp Cams and RHS to set up a test using a Chevy Small Block that has a reputation for using a poor head casting. The camshaft will produce optimum torque from the low-end to the mid-range, Performer-Plus. of torque when used with 3701 intake and stock iron cylinder heads on a 350 engine. This Edelbrock cam kit produced 245 ft-lbs. However there are many more considerations to be made about such a big decision that can make or “brake” a good engine build. Edelbrock part 3702 Performer-Plus camshaft is designed for small-block Chevy 305-350 T.B.I & LG-4 V-8 applications. When picking out cylinder heads to upgrade an engine, in general most people think in terms of flow.