Page 4 of Skunks Engine Tuning by skunk2 Racing

skunk2.com skunk2 camshafts skunk2 camshafts deliver unparalleled power as a result of continual extensive development and testing skunk2 camshafts maximize power across the entire rpm band this is achieved by utilizing advanced manufacturing techniques and the latest computerized simulation and modeling design techniques our proprietary amax and fast ramp technologies maximize area under the lift curve and reduce seat timing which maximizes torque and cylinder pressure these technologies allow greater gains without compromising reliability and valvetrain stability skunk2 racing designs develops and tests all of our camshafts in-house to ensure the highest quality and performance gains each camshaft uses newly revised camshaft blanks that have increased torsional strength improved durability characteristics and reduced frictional effects they are ground to exact skunk2 specifications using state-of-the-art cnc cam grinding machines equipped with cubic boron grinding wheels and feature a hardened wear-resistant lobe and outer surface skunk2 camshafts are available in our tuner series line and our pro-series line of racing camshafts each offering exceptional performance reliability and quality dohc vtec camshafts skunk2 pro-series professional line of racing cams are designed to optimize mid-range and top-end hp and tq and significantly reduce lap times vtec crossover is seamless allowing for the broadest possible powerband no other line of racing cams can even come close to the performance of the pro-series line pro-series patent pending camshaft profiles dramatically improve horsepower torque engine response and valvetrain stability the pro 1 cam is the best all-around street cam and dramatically improves horsepower torque engine response and valvetrain stability pro-series camshafts feature a seamless crossover between low and high speed cam lobes with patent pending profiles defined by specific lobe shapes as well as specific characteristics of lift velocity and acceleration pro-series cams are all designed utilizing skunk2 s proprietary fast ramp technology and amax technology use of these two technologies allows us to design aggressive camshaft profiles that maximize area under the valve lift curve without adversely affecting valvetrain stability or reliability in fact the use of fast ramp and amax technologies actually makes pro-series camshafts more stable and less prone to spring surge at high rpms pro-series camshafts also feature our newly revised camshaft blanks that have increased torsional strength improved durability characteristics and reduced frictional effects all of which are the reasons why pro-series camshafts are superior to all other cams pro-series camshafts are available in pro 1 pro 2 and pro 3 designs pro 1 high lift street/race cam designed to optimize mid-range and top end hp and tq peak power is designed to occur at factory redline pro 1 cams also perform great in high-output turbo racing engines valvetrain upgrade required pro-series valvetrain recommended pro 2 high lift street/race cam designed to optimize mid-range and top end hp and tq peak power is increased and power band is moved 700rpm higher than pro 1 pro-series valvetrain required pro 3 extreme street/race cam designed to optimize mid-range and top end hp and tq peak power is increased and power band is moved 700rpm higher than pro 2 no other high rpm racing cam can come close to the pro 3 pro-series valvetrain required i ve dynoed over 30 different vtec cams from japan uk and usa the skunk2 pro-series cams are the best i ve ever seen the flat torque curve is amazing don flores dfe enterprises skunk2 did its homework with these new camshafts that should get the blood pumping in all you honda and acura fanatics out there import tuner magazine camshaft requirements recommendations guide svt v r ca hc dvp ps vs fpr vtc me h ae ok to use stock valvetrain forged valves titanium retainers carb approved high compression deep valve pocket pistons pro-series valve springs tuner valve springs fuel pressure regulator and/or fuel injectors vtec controller modified ecu header aftermarket ecu why skunk2 cams make more power skunk2 advanced profile design fast ramp technology more area under the curve results in greater torque and horsepower at all rpm ranges and lower emissions slow ramps less area under the curve results in less torque and horsepower and greater emissions profile designed to maximize area under the lift curve without compromising reliability and valvetrain stability the skunk2 profile has more duration than competitors at lifts above 1mm resulting in greater efficiency and power skunk2 amax technology b-series pro b16a-b b18c 1.6 -1.8l dohc vtec competitors traditional profile +10º 8mm lift · the same camshaft design technology used in f1 · designed to reduce seat timing and build more torque · carefully designed to not damage valvetrain parts · allows engine to build additional cylinder pressure skunk2 fast ramp technology · slow and lazy ramp designs that result in less tq and hp · do not be fooled by their large advertised duration numbers · excessive pressure and emissions bleed off competitors old technology h-series pro h22a f20b 2.0 2.2l dohc vtec note quick settings using skunk2 cam gears are shown in red these are approximate settings in terms of marks on the cam gear actual settings may differ with various deck heights and valve sizes it is the users obligations to check all piston-valve and valve-valve clearances all pro-series cams are for off-road use only never to be used on pollution controlled vehicles or on public highways see required and recommended columns on cam application charts above is diagram of a skunk2 valve lift curve profile compared to a competitor cam profile both cams have 250º at 1mm lift the competition advertises a 320º duration at 0mm lift specification while skunk2 s 0 lift duration is 40º less do not be fooled by the competitors large advertised 0mm lift duration numbers large 0mm lift duration numbers result in less torque and horsepower the closer the 0mm duration is to the 1mm duration number the better the cam will perform in other words given the same 1mm duration numbers the cam with smaller 0mm lift duration and greater durations above 1mm will make more power skunk2 achieves this through the use of skunk2 fast ramp technology and by maximizing duration above 1mm and area under the lift curve by using skunk2 a-max technology pro-series idle tuning tips skunk2 pro-series professional line of racing cams were designed to optimize mid-range and high-rpm hp and tq and provide a seamless transition from the low-speed cam lobe to the high-speed cam lobe in order to achieve that we made the low-speed lobes much larger which results in more overlap and lower and less consistent vacuum at idle when the ecu sees this lower vacuum it tries to compensate by enriching the fuel mixture making the car idle rough in order to make the engine idle smoothly it is necessary to reduce the fuel by 20 30 in the 0-1500 rpm range of the fuel map to get the smoothest idle possible we recommend tuning by throttle position please note that if the cams are not degreed in to their proper position it may make getting the car to idle more difficult therefore in order to optimize power output and minimize idling and clearance issues we recommend that all pro-series cams be degreed in for more information on how to degree camshafts and on cam timing go to page 21 for more information on cam centerlines go to page 73 engine tuning engine tuning 16 390 bhp skunk2 built k24a engines power projects delta and beta these cars run the same profiles and use the same cores as our tuner k-series stage 3 cams and are capable of revving to 11,000 rpm 210 whp skunk2 built b16a engines using tuner series stage 3 cams were designed to run above 9000 rpm for hours at a time building lift restricted 17,000 rpm cams for matsushima performance s ama formula xtreme bikes was challenging and fun before a cam can be designed the cylinder head geometry must be measured and modelled in the cad system we do a great deal of analysis on various cams to determine what works and what doesn t work we try to incorporate all the good stuff in our designs designing profiles is part science and part art our cam designers are experienced engine builders whose designs are guided by knowing what the engine needs 95 .808.9888 1 17 pro-series

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