Description
Chris Rivas Rocket Cams for Twin Cam
Chris Rivas Signature Series Rocket camshafts, are specifically designed for late model Harley-Davidson® big twins, with a goal of keeping high cylinder pressure for optimum power throughout the entire RPM range. The Twin Cam® Rocket Cams also feature the Easy Start centrifugal compression release system licensed by S&S Cycle® for easy starting even with large displacement and higher compression ratios. Developed from years of NHRA® Pro-Stock motorcycle racing and engine building, Bonneville land speed racing and street building experience ensures you’re getting the highest quality American made camshafts for your twin cam engine.
514 Chain Drive Cams:
Best power with free-flow air cleaner and performance exhaust. Cruising hi-torque bolt-in cams. Incredible low rpm pulling power recommended for heavier bikes with stock compression ratio or up to 9.5:1. Peak performance at 1500 to 5000 rpm. Use stock valve springs. Very easy on valve train parts
554 Chain Drive Cams:
Peak performance at 1500 to 5800 rpm. Stock compression ratio or up to 10:1. Best power with free-flow air cleaner and performance exhaust. Powerful cruising bolt-in cam. Uses stock valve springs. Recommended engine sizes 88″ to 107″ above average mid-range passing power.
574 Chain Drive Cams:
Powerful Street and Cruising bolt-in cam with .574″ lift. 96″ to 107″ above average mid range passing power. Stock compression ratio or up to 10:1. Best power with free-flow air cleaner and performance exhaust. Uses stock valve springs. Range: 1,500 to 5,800 rpm. Available with S&S Cycle patented Easy Start compression release system.
584 Chain Drive Cams:
Hot .584″ lift cam for upgraded engines 103″ to 107″ Cubic Inch. Ported heads with minimum 10:1 compression recommended. Delivers constant power while reducing detonation. Free-flowing air cleaner and performance exhaust recommended. Uses stock valve springs. Range: 2,000 to 6,000 rpm. Available with S&S Cycle patented Easy Start compression release system.
|
Rocket 514 |
Open |
Close |
Duration @ .053 |
Max Valve Lift |
Valve Lift at TDC |
|
Intake |
14° |
36° |
230° |
.514” |
.162” |
|
Exhaust |
46° |
14° |
240° |
.514” |
.141” |
|
Rocket 554 |
|||||
|
Intake |
22° |
38° |
240° |
.554” |
.182” |
|
Exhaust |
54° |
16° |
250° |
.554” |
.172” |
|
Rocket 574 |
|||||
|
Intake |
22° |
38° |
240° |
.574” |
.198” |
|
Exhaust |
54° |
16° |
250° |
.574” |
.164” |
|
Rocket 584 |
|||||
|
Intake |
26° |
46° |
252° |
.584” |
.213” |
|
Exhaust |
50° |
22° |
252° |
.584” |
.198” |