The Cam Professionals at Erson Cams have developed the first 4-7 swap firing order Hydraulic Roller Camshaft Series for the Small Block and Big Block Chevrolet. Erson Cams, a leader in valve train design brings the latest in cam technology to the street with its Hi Rev / Hi-Tech Series of Hydraulic Roller Camshafts. Reap the benefits of faster acceleration, smoother performance and better fuel distribution… Call BPM for more details to fit your application!!! 270.763.6490
Retro-fit 4-7 Swap Hydraulic Roller Camshafts
Small Block Chevrolet 262-400 Cl 8 Cyl 1955-98 .... $295.75
| Cam Applications | RPM Range | Duration ADV @.050 | Gross Lift 1.5 | Gross Lift 1.6 | Lobe Center | ADV | Valve Lash |
| Strong mid-range power needs at least 9.5:1 compression, dual plane intake, free flowing exhaust & at least 2000RPM converter for best performance. Will have noticeable idle. | 2200-5200 E119840-47 |
IN 272 218 EX280°226° | .480" .480" | .512" .512" | 108° | 0° |
.000” .000” |
| Hot street machine with at least 10:1 compression. Aftermarket dual or single plane manifold. 650 cfm or larger carb, headers & a 2500 RPM converter. 3.42 or lower gears. Lopey idle. | 2200-5200 E119840-47 |
IN 286° 226° EX 294°234° |
.548" .548" | .512" .512" | 108° | 0° |
.000”
.000” |
| Excellent choice for street machines with roots or centrifugal type superchargers, running 6 to 12 lbs of boost. 2000 RPM converter and good exhaust. Also works well with fuel injected normally aspirated engines. Will require performance chip or tuneable type fuel injection. | 2500-5500 E119847-47 |
IN 286° 226° EX294° 234° | .548" .548" | .584" .584" | 112° |
0° | .000” .000”  |
| Hot Street/E.T. Brackets. No less than 10:1 compression, aftermarket heads with 1.6 rockers for best performance. Needs good intake manifold, 750 CFM or larger carb. At least 3000 RPM converter and 4.10 or, lower gears. | 3000-6000 E119849-47 |
IN 298° 238° EX 306° 246° |
.548" .548" | .584" .584" | 108° | 0° | .000” .000”  |
| Serious street machines with roots or centrifugal type superchargers, up to 15 lbs of boost. Needs 2500 RPM converter, headers and free flowing exhaust. Also a good choice for 383 ci or larger cubic inch engines with aftermarket fuel injection. | 3000-6000 E119851-47 |
IN 298° 238° EX306° 246° |
.548" .548" | .584" .584" | 112° |
0° |
.000” .000” |
| Hot Street/ E.T. Brackets. Strong mid-range torque & top end horsepower, in 383 CID & larger engines. No less than 10. 5:1 compression, aftermarket heads, single plane intake, 1.6 rockers for best performance. 3000-3500 RPM converter and 4.10 or lower gears. Rough idle. | 3500-6500 E119853-47 |
IN 302° 242° EX310° 258° |
.548" .548" | .584" .584" | 108° | 2° | .000” .000”  |
| Pro Street / E.T. Brackets. Max effort in larger cubic inch engines. No less than 11.1 compression, aftermarket heads, Victor style intake | 3800-6800 E119855-47 |
IN 310° 242° EX318° 258° |
.548" .548" | .584" .584" | 108° | 4° |
.000” .000” |
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