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Old 11-24-2002, 01:46 PM
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Talking Street Hydraulic Roller Vs Flat Tapet Hydraulic

I am currently collecting parts to build a Chevy 383 Stroker. Besides the engine parts I will be using these parts from my current engine. I have World Sportsman II heads. Edelbrock performer intake, Pertonix HEI distributer, Holley Street Avenger 770CFM. TH 350 Trans with 2100 Stall Converter & 3.73 Posi rearend. This will be going into a heavy 4000# 1976 Monte Carlo. I know I need a lot of low and midrange torque to get this beast moving. For high performance street use, will I gain much by using a Street Hydraulic Roller cam Vs Flat Tapet Hydraulic cam ? Will a roller cam with .530 lift and shorter duration 225 or less be worth the extra cost ? Thanks for the help, sorry so long


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Old 11-24-2002, 02:47 PM's Avatar
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a hydraulic roller cam opens the valves faster and closes the valves faster than a comparative flat tappet cam, this gives you more open valve under the curve, this fills and scavenges the cylinder better, you will already have good low end with the 383, if you can afford the roller do it.
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Old 11-24-2002, 11:31 PM
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I agree, roller tappets are superior in every way to flat tappets. Less friction, more power, more life. Every late model pushrod engine comes with these from the factory now.
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Old 11-25-2002, 05:06 PM
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The heavier hyd. rollers can float pretty early. Without the expense of new springs keep the motor below 6800.
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