See us on:
Visit CP on Facebook Visit CP on Twitter Visit CP on YouTube
Is your boat in the gallery?
Image Gallery  
Instructions & Guides:
Instructions  
Find Parts by Mercury Model:
OEM Part Finder  
What's on sale today?
Sale Specials  
What are you looking for Today?

Need Help? Call Us:

1-800-225-9871

Outside the USA? Call 707-585-9871


Lightning High Performance Anti-Reversion Camshafts:

FACT: ALL CAMSHAFTS ARE NOT CREATED EQUAL!

WHAT IS REVERSION??? Reversion is simply the intake and exhaust gases momentarily flowing backwards during the overlap phase of the camshaft at low cycling rates. Overlap means just what the word implies.  The intake event overlaps the exhaust event and the exhaust event overlaps the intake event.  The overlap event starts with the piston on the exhaust stroke.  As the piston is pushing out the last of the exhaust gases and about 30 or so degrees before the piston reaches top dead center the intake valve begins to open.  At low cycling rates the intake charge and the exiting exhaust pulse have not yet created any momentum. Thus the piston pushes some of the spent exhaust gas into the intake manifold.  That is why engines with big camshafts have that radical sounding idle.  The exhaust pulses shoots up into the intake manifold causing a major disturbance.  The cylinders receive an uneven mixture of air, fuel, and spent exhaust gas.

Why??? Today's performance engines evolved from cars that never intended to have water mix with the exhaust. This is where the car camshaft (Summit) and the marine camshaft (Lightning) separate.  The extensive overlap found in the car camshaft engine will tolerate water in the exhaust. In the Lightning Reversion Reducing Performance Camshaft and Lifter Combs every effort is made to reduce overlap especially in regards to exhaust valve closing point. With reversion greatly reduced, if not totally eliminated, the presence of water in the form of steam is still present and water migration is still an issue.

How??? Anti-reversion camshafts and lifter combs until recently were thought not even conceivable. But with today's modern engine development technology these new camshafts were created. Hours upon hours of testing have shown that with proper lobe phasing, including a increased LSA , lobe profile, and installation phasing, along with headers options and specialized lifters, that a powerful camshaft can now be produced that greatly reduces engine reversion commonly found in engine with these types of performance specifications.

Click on the part number to check pricing or place an order.

APPLICATION VALVE SETTING CAM ONLY CAM KIT

DURATION IN DEGREES LIFT WITH 1.7 ROCKER ARMS LOBE SEP. ANGLE
 @ .050"  ADVERTISED
IN. EX. IN. EX. IN. EX. IN. EX.
Hydraulic Roller - Stage 1 - Perfect for a customer seeking big HP gains from their naturally aspirated applications. Camshaft has a moderate rumbling idle but still smooth enough for comfortable dock maneuvering.This camshaft has been a intricate part of building 600HP engines from original 502CID or500HP applications. Performance free flowing exhaust is a must Note this grind is compatible with EFI engines when used with Custom Hardin Marine ECU reprogramming. Will work with wet exhaust systems Nine position timing set required for proper installation sold separately. *WILL NOT WORK WITH SILENT CHOICE or switchable
Gen 4/5 HYD HYD 755-231239 755-231239K 231 239 281 289 .621 .624 112°
Gen 6 HYD HYD 755-031239 755-031239K 231 239 281 289 .621 .624 112°
Hydraulic Roller - Stage 2 - This is an incredible camshaft perfect for both naturally aspirated as well as supercharged modified 509-540CID applications. This camshaft has shown great 650 thru 850HP Plus horsepower while still providing drivable dockable characteristics. Performance free flowing exhaust is a must. Note this grind is compatible with EFI engines when used with Custom Hardin Marine ECU reprogramming. Will work with wet exhaust systems. Nine position timing set required for proper installation sold separately.*WILL NOT WORK WITH SILENT CHOICE or switchable systems.
Gen 4/5 HYD HYD 755-244248 755-244248K 244 248 294 298 .624 .629 114°
Gen 6 HYD HYD 755-044248 755-044248K 244 248 294 298 .624 .629 114°
Hydraulic Roller - Stage 3 - Now were getting serious about making some big horsepower. This camshaft is recommended for large cubic inch engines ranging from 540-600CID. This camshaft has shown best results with aftermarket cylinder heads. This camshaft has an aggressive idle while building huge mid-range horsepower and torque. This camshaft has shown 850HP thru 1000HP plus on mid boost applications Performance free flowing exhaust is a must.This camshaft will not work on EFI applications unless custom engine builder supplied reprogramming is used. Will work with wet exhaust. Nine position timing set required for proper installation sold separately.*WILL NOT WORK WITH SILENT CHOICE or switchable systems.
Gen 4/5 HYD HYD 755-252262 755-252262K 252 262 302 312 .629 .629 114°
Gen 6 HYD HYD 755-052262 755-052262K 252 262 302 312 .629 .629 114°
Hydraulic Roller - Stage 4 - This is the bad boy of the bunch designed around large cubic inch engines of 555cid or larger supercharged and blown applications. This camshaft is designed for applications where maximum performance is the goal. Aggressive rough idle. This camshaft is capable of making 1000 Plus horsepower from these combinations This camshaft requires aftermarket performance cylinder heads 345cc or larger. free flowing exhaust is a must. This camshaft will not work on EFI applications unless custom engine builder supplied reprogramming is used. Will work with wet exhaust. Nine position timing set required for proper installation sold separately.*WILL NOT WORK WITH SILENT CHOICE or switchable systems.
Gen 4/5 HYD HYD 755-260264 755-260264K 260 264 310 314 .639 .639 116°
Gen 6 HYD HYD 755-060264 755-060264K 260 264 310 314 .639 .639 116°