Questions and answers
High energy cams Pure energy cams Dual energy cams Magnum description Mag. solid roller
Magnum cam Hydralic roller cams Hi-tech race cams Xtreme energy Nitrous HP

240H High Energy Cam: The 240H Cam is ideal for small cubic inch engines that require good low R.P.M. torque. The 240H Cam is a good replacement cam for O.E.M. because no additional valve train components are necessary. This cam works great with computer ignition systems, overdrive transmissions and high, gear rations. The 240H Cam provides a very smooth idle, quiet operation and good throttle response. With. the 240H Cam, you can expect better mileage and a slight power increase over a stock cam.

252H High Energy Cam: The 252H Cam is ideal for medium-sized engines (300-350 c.i.) that require good low speed torque. This cam is a good "all-around" cam for family sedans and a great performance cam for turbocharged V-6 and V-8 engines. The 252H Cam is a good replacement cam for O.E.M. and works will with computer-controlled ignition systems, overdrive transmissions, and high gear ratios.

260H High Energy Cam: The 260H is the perfect cam for vans, family sedans, pickups, and tow vehicles. This cam provides exceptional power and a mileage increase, especially on the highway. With its great torque and throttle response, the 260H Cam can also be used for O.E.M. replacement in most big block applications. The 260H's idle is smooth in large engines with stock exhaust systems. With headers, the 260H will produce a slight exhaust sound.

268H High Energy Cam: The 268H Cam is our most versatile cam. It is a great high performance cam for small blocks and a powerful cam for big blocks. With its noticeable idle and great all-around power, the 268H Cam is great for daily driven performance vehicle. The 268H Cam is an ideal cam for pickup drivers who want major power increases. It is also good for big blocks towing heavy loads equipped with lower optional rear end gears.
Q. How will a High Energy Cam react compared to a stock cam?

A. All High Energy designs are totally streetable cams. They will product more power that a stock cam throughout the R.P.M. range. Each High Energy Cam has a pa rticu la r R. PM ra nge i n A ich it works best. By selecting the High Energy Cam that best suites your particular driving needs, exceptional power increases can be expected.

Q. How will a High Energy Cam affect my everyday driving?

A. High Energy Cams work great for everyday driving without the "bad" side effects normally found with other cams. High Energy Cams produce more power, are more efficient, and do not affect the engine's idle characteristics to the pointof making yourcar undriveable.

Q. What effect will a High Energy Cam Have on my power accessories?

A. High Energy Cams will not affect any vacuum or power accessories such as power brakes or steering. High Energy Cams will not affect air conditioning or your car's idle when the air conditioning is used.

Q. Can I use stock lifters with my High Energy Cam?

A. Remember ' Competition Cams prides itself in supplying the ultimate in hydraulic lifters. Even though High Energy Cams will work with stock lifters, to insure the maximum benefit of the camshaft profile and protection of warranty, only Competition Cams lifters should be used.

Q. Will I have to Change valve spring to run a High Energy Cam?

A. In almost every case, a valve spring change is not necessary. However, a worn-out set of springs will not perform properly, especially when you consider that a High Energy Cam has a faster valve acceleration rate than a stock cam. Be sure to take into consideration the condition of your motor. A high mileage engine will definitely need new springs. Competition Cams has matched sets of valve springs to go with each of the cams in the High Energy series.
Big Block Chevrolet Owners: A spring change is an absolute necessity in your case. Stock springs are designed for up to a .398 lift only. Using a higher lift can that stock will result in excess open spring pressure causing instant cam lob failure! Use #911-16 valve springs with all Big Block High Energy Cams.

Q. Will a High Energy Cam work with any stock computer?

A. Yes, certain High Energy Cams will work with the stock computer. The main considerations are valve overlap and manifold vacuum. It is recommended that you call our technical hot line for information concerning your particular application. Competition Cams also offers special High Energy Cams designed for use with computers. See page 62 for V-8 Chevrolets and pages 108, 112 and 114 for V-8 Fords.

Q. How well will a High Energy Cam work with a stock intake and exhaust manifold? What if 1 want to run headers and an aftermarket intake?

A. High Energy Cams are designed to be used in stock engines with no other modifications. Therefore, you can expect better power and efficiency over a stock cam with stock manifolds. However, High Energy Cams work very well with aftermarket intakes and headers. Care must be taken to select the right combination of parts. Normally, small tube headers and dual plane intakes work best with High Energy Cams.

Q. Will 1 have to run higher compression with a High Energy Cam?

A. No. All High Energy Cams are designed to work with 8:1 or 9:1 compression. The unique lobe designs used on High energy Cams allow them to build good cylinder pressure without the need for high static compression ratios. That's why they work so well and make so much torque. Higher compression ratios will only work against the cam and possibly cause detonation and preignition.

Q. Will I have to run higer compression with a high energy cam?

A. We would like to see everyone degree in their new High Energy Cam. This insures that the cam is set correctly in relation to the crankshaft and piston movement. We also realize that not everyone has degreeing tools. Degreeing a High Energy Cam is not necessary if it is installed with a "True Zero" timing chain set. All High energy Cams are ground with the cam pin moved ahead 4 degrees. When you install your High Energy Cam, it will already be 4 degrees advanced.

Q. Do I have to re-jet my carburetor when I install a High Energy Cam?

A. In almost every case, you will not need to change jets. In some installations where the carburetor is lean to begin with, you will need approximately 2 jet sizes richer. This can be detected by slight surging at highway speeds and is most common with the 260 and 268 cams. By running richer jets you gas mileage will not suffer. Your engine will actually be more efficient by having the correct air/ fuel ratio.

Q. How much power and mileage can I expect from a High Energy Cam?

A. High Energy Cams are designed to improve your engine's efficiency through our unique lobe characteristics. High Energy cams will produce more power and be more efficient that stock. When installed in proper applications, High Energy Cams will produce better mileage and power. To assure maximum efficiency, make sure everything on the engine is working properly. It takes only one component, such as the carburetor or part of your ignition system, to cause your mileage to suffer.

These cams are 50 state legal replacement cams for all 1987 and earlier small block Chevy carbureted engines. These cams will produce a slight increase in horsepower as well as a noticeable increase in torque. Smaller cubic inch engines will also see an increase in gas mileage.

Q. Will a Pure Energy cam work with my stock computer system?

A. Yes, these cams are designed to work with all factory computers used in 1987 and earlier engines that use carburetors instead of fuel injection.

Q. Will this cam work with my stock valve springs?

A. Though we recommend that you install a new set of Competition Cam 980-16 valve springs for proper warranty coverage, the factory springs will work on this camshaft.

Make sure that the factory springs are thoroughly inspected for any breaks or loss of spring pressure before attempting to reinstall them.

Q. Does this cam have to be "degreed" in?

A. We recommend that a new "zero" timing set be installed because the factory set could have retard built into the gears. If the recommended set, part number 3200, is used, the cam can be installed "straight up." This cam is made with 4 degrees of advance built in to enhance the performance, so that when used with a "zero" timing set, it is positioned correctly. But to be sure of the exact placement of the cam. We still recommend degreeing in the cam.

Q. How con 1 prove to my local certification station that this cam is 50 state legal?

A. The cam comes with a certification sticker with all of the pertinent information necessary for emissions certification. This can be installed under the hood or kept with other important papers in the car.

Q. Will this cam work with my stock intake and exhaust manifolds?

A. Yes, this cam is designed to work with all of the stock components and accessories. It has no adverse effects on any of the parts. If you decided to improve some of these parts, it will only enhance the performance of your engine. Be careful, make sure you use equipment that also has a 50 state legal certification.
255 Dual Energy: The 255 Dual Energy is great for low R.P.M., high torque applications. It will also give good fuel economy. The 255 will have a smooth idle and will work well in an RV or towing application.

265 Dual Energy: The 265 Dual Energy has good mid range power for mild street performance with a slightly noticeable idle. This cam also works will with a stock torque converter and rear end gears over 3.23:1. The 265 also works well with stock intake and exhaust manifolds.

275 Dual Energy: The largest and most aggressive in the dual energy series, the 275 Dual Energy Cam is designed for high performance street driving, yet will work a stock torque converter. The 275 will have a rough idle, but will work stock exhaust systems.

Q. What is a Dual Energy Cam?

A. A. Dual.Energy Cam is a relatively new series of cams that we designed to address the growing market for dual pattern cam.

Q. What is a duct pattern cam?

A. A dual pattern can is one that has a different lobe on the intake and exhaustlobes. For instance, the liftand duration on the intake may be smaller or larger that the lift and duration on the exhaust.

Q. Will the Dual Energy Cam work with my power accessories?

A. These cams will have no adverse effects on any power or vacuum accessories like power brakes or power steering. The idle qualities of the 275 is even mild enough that it is right with air conditioning.

Q. Con these cams work with my stock valve springs?

A. Though the smallest of the series is compatible with stock valve springs in most applications (not Big Block Chevy), we strongly recommend that a new set of Competition Cams valve springs be installed to match the camshaft. It is absolutely necessary that the correct springs be installed on the 275 series.

Q. Do 1 have to degree this cam?

A. These cams are made with four degrees of advance in the cam, this means that if you install the cam with a true zero timing set that the cam should be placed

correctly in the engine when installed "straight up." Though this is the most common method of installing the cam, we still recommend that the cam be degreed in to ensure correct placement.

Q. Will a Dual Energy Cam work with a stock computer?

A. Because of the many different styles of computers and cams, this question will have to be answered on an individual basis. We recommend that you call the Cam Help line for specific application information. It is safe to say that the 275 will not work in almost any computer controlled application.
270H Magnum Cam: The 270H Magnum Cam is a great cam for high performance driving in street machines. The 270H has a rough idle in small blocks and a noticeable idle in big blocks. This is the largest cam you can use with a stock torque converter. The 270H will not affect power accessories, but should be used with headers and a 4 bbl. carburetor. This is the perfect cam for cruising.

280H Magnum Corn: The 280H Magnum Cam is best for the more serious street machines. This cam has a definite rough idle and will sometimes affect power accessories. It can be driven extensively on the street or raced on theweekends. The 280H needs and aftermarket torque converter, intake manifolds and headers.

286H Magnum Cam: The 286H Magnum Cam is a new cam designed to fill in the gap between the 280 and 292. Designed for serious street machines and bracket racers. With a rough idle and lower vacuum signal, this is not an average street cam. At leasta 2500 rpm converter mustbe used, buta 3000 is recommended.

292H Magnum Cam: The 292H Magnum Cam is for the serious "Street/Strip" type car. An aftermarket torque converter should be used as well as headers, intake, and increased compression. The 292H has a radical rough idle.

305H Magnum Cam: The 305H Magnum Cam should really be considered for Pro-Street type cars where actual streetability is not a major concern. The design of this cam also makes it ideal for all bracket racing engines. Major engine modifications are needed as well as transmission and driveline improvements. The 305H works best in large c. i. engines and has a radical idle.

2705 Magnum Cam: the 270S Solid Magnum Cam is the perfect cam for small to medium cubic inch engines. The 270S delivers good low speed torque with a moderated noticeable idle. This cam is an excellent alternative to the 268H.

2825 Magnum Cam: The 282S Solid Magnum Cam is great for street machines because it cam be driven daily and raced on weekends. This cam features a broad power curve and torque range with a mild rough idle.

2945 Magnum Cam: The 29AS Solid Magnum cam is a maximum performance cam. This cam should be used in high compression 4-speed cars or with a stall speed converter. The 294S makes great top-end power and works well with ported heads.

3065 Magnum Cam: The 306S Solid Magnum Cam is an excellent grind for large cubic inch Pro-Street type engines. This cam has tremendous high R.P.M. power and needs to be used with headers, intake, and higher compression. An aftermarket torque converter or 4 speed should be used. Radical idle.
268R Roller Cam: The 268R Roller Cam is the most versatile of all the street roller cams. Excellent throttle response and vacuum makes the 268R an ideal cam for Street Rods, StreetMachines and Show Cars with power accessories. The 268R is an excellent all-around cam for the performance minded enthusiast due to its reliability and mileage.

280R Roller Cam: Street/Strip

performance or daily usage is possible with the 280R Roller Cam's broad range of applications. A moderate idle in the higher compression engines makes the 280R a good choice for Street Machines or Street/Strip applications where power and valve train stability are important.

288R Roller Cam: The 288R Roller Cam is a proven camshaft that provides great power and reliability. This cam works best with aftermarket manifolds, headers, and other performance accessories. Stall speed converters should be used and 4: 10 gears or better. A rough idle and moderate vacuum makes the 288R an excellent choice for Serious Street Competition.

300R Roller Cam: The 300R Roller Cam is an excellent choice for maximum effort Street Machines with small blocks and 10.5 or better compression with 3,500 to 4,500 converters. Aftermarket headers and

manifolds are good accessories for this cam. Increased horsepower and torque per cubic inch make the 30OR a true high performance cam in small and big block applications.

308R Roller Cam: The 308R Roller Cam is a true race cam featuring quality and valve train stability. This is a maximum effort Pro Street/Strip cam for big blocks or high R.P.M. Small blocks. The biggest of our street roller cams, the 308R produces maximum horsepower in the higher R.P.M. ranges. The 308R is the Pro-Stock cam for Pro-Street cars.
MAGNUM Q & A Back 
Q. How will Magnum Cams affect the idle of my engine?

A. Magnum Cams are specifically designed for the Street Enthusiast looking for more power with that Pro Street sound. The idle characteristics of your engine will change due to the increased duration and overlap of the Magnum Cam Series. You will notice a racy idle with the 280 Magnum Cam. The 292 and 305 Magnum Cams will produce a rough or "rumbley" idle.

Q. How will Magnum Cams affect my power accessories?

A. Magnum Cams will affect your power accessories to a certain extent. The 280 and 292 Magnum Cams are the biggest cams that should be used with power assisted brakes, air conditioning, etc. you should remember that the bigger the engine is, the less the cam will affect the vacuum which affects your power accessories. The smaller your engine is, the more the Magnum Camshaft will affect you power accessories. Most late model vehicles have a vacuum canister. If your vehicle does not have a vacuum canister, it may be necessary to add one.

Q. Will Magnum Cams work with stock lifters?

A. Magnum cams will work with NEW stock lifters. We recommend, however, that you use COMP Cams' lifters due to their high quality and designed bleed rate. You will also protect your cam warranty if you use Competition Cams' lifters,

Q. Will Magnum Cams work with my stock valve springs?

A. All Magnum Cams listed in this catalog MUST use the recommended valve springs as listed in our catalog. The use of incorrect springs with these cams could cause severe engine damage. If you have any questions, call us to be sure.

Q. Will it be necessary to change my torque converter with a Magnum Cam?

A. Yes, it may be necessary to change your torque converter to achieve maximum performance. It really depends on the size of the engine and the cam being used. Generally speaking, the 270 Magnum Cam in small blocks and the 280 Magnum Cam in big blocks are as big as can be used with stock converters.

Q. Should 1 degree in my Magnum Cam?

It is not necessary to degree in your Magnum Cam when the proper COMP Cams Timing Chain Set is used. COMP Cams has spent hundreds of hours testing the Magnum Cam series in different applications. All Magnum Series Cams have 4 degrees of advance ground into the cam to make sure that it can be put in the engine where it will produce the most horsepower.

Q. Will 1 have to re-jet my carburetor?

A. It may be necessary to re-jet your carburetor to properly correct the fuel/air ratio and to achieve maximum power from your Magnum Cam. In most cases, jetting up 2 to 4 sizes will correct a lean condition. A call to the Competition Cams Technical Department will be very helpful in the proper selection of the right timing and jet combination.

Q. Do Magnum Cams work with aftermarket accessories such as headers, intake manifolds, etc.

A. In many cases, the addition of an aftermarket manifold and/or exhaust will enhance the power of the engine equipped with a Magnum Cam. Although Magnum Cams will work well with stock manifolds and exhaust (duals), aftermarket manifolds and headers definitely increase power. It's just a matter of exactly how much power you want!

Q. What kind of power increase con 1 expect from a Magnum Cam?

A. It is very possible to pick up as much as 100 horsepower with the 280 Magnum Cam. Of course, the 292 and the 305 will make even more horsepower that the 280. It all depends on what your application is as to which of the Magnum Series of cams you will use.

Q. Will 1 have any problems with piston to valve clearance with a Magnum Cam?

A. In many cases, piston to valve clearance is not a problem. We do suggest that when the 292 or 305 Magnum Cam is used, the piston to valve clearance be checked to ensure that there will be no problems. But to be sure, always check piston to valve clearance.

Q. What should 1 do if 1 have a problem selecting a Magnum Cam?

A. Simply call the Competition Cams Cam Help line. Our technical staff is without question one of the best in the country. They can help you select the right cam for your needs. They are here to help you and make sure that all of our customers are happy and satisfied with our products.
Q. What con 1 expect from hydraulic roller setup as compared to a conventional flat tappet cam?

A. First, there is a dramatic decrease in friction, as well as a decrease in wear at the lifter. As far as power, the roller profile allows Competition Cams to design in more lift, giving a much greater top end power without sacrificing bottom end.

Q. Will there be any increase in noise from the hydraulic roller lifters?

A. No, the hydraulics of the lifter are exactly the same, only with a roller on the bottom. They adjust and act exactly as a conventional lifter.

Q. Is any machine work necessary to install a hydraulic roller in a Small Block Cheyrolet where a flat tappet was originally*.

A. In late model blocks, 1987 & up, the most that would be necessary is the drilling and tapping of a few holes. On earlier models, a retrofit kit is available with no machine work necessary.

Q. How difficult is installation in a 5.0 Ford engine?

A. Most late model 5.0 blocks have the provisions for the hydraulic roller cam. On earlier blocks, a kit is available with all the necessary hardware that only requires drilling and tapping a few holes.

Q. Must 1 use a thrust button on my hydraulic roller cam?

A. All Fords have a plate to retain fore and aft movement of the camshaft. Early pre 1987 Chevrolet blocks require a thrust button.

Q. Where con 1 get all the associated parts to install this hydraulic roller cam?

A. Competition Cams has in stock all parts necessary for installation. These include all the small "dealer only" parts as well as the traditional aftermarket parts.
Q. Why con 1 expect a Competition Cams race cam to out power any other brand?

A. All COMP Cams are computer designed with a specific purpose. At COMP Cams, a special computerized master machine enables us to make new lobes in a fraction of the time of other cam companies.

Pages 162-175 illustrate only a few of the lobes available for special grinding.

Q. Will these more powerful lobes be harder on parts?

A. It is always difficult to get something for nothing, but atCOMPCarnswedo notgeneralize lobes, and special designs are used for drag racing, circle track, marine, etc. Any change in lobes will affect other engine components; however, COMP Cams has the ability and training to build a component kit that will work with your cam lobes for greater durability and longevity. By not compromising the designs, we can insure durability of parts.

Q. Are all steel roller cores gold collared between the lobes?

A. No. Some are gold, but a large percentage are black. COMP Cams uses camshaft cores from a number of different suppliers. In most cases we have specified a certain material and heat treat. This is a result of many years of testing and experience to give the ultimate strength and life of the cam.
Q.Whydothe streetrollercarns and the hydraulic roller cams appear to be cast. Aren't all roller cams supposed to be ground on ~1 billet cores?

A. Since most of these cams are run in street engines for some length of time, it became necessary to develop a core with a clis ' tributor gear for street use. All steel billet cams must use a bronze gear, which is unacceptable for the street, so this "austempered" process was developed to solve this problem.

Q. What is so special about your NASCAR "Pro Core?"

A. There was a serious problem in the most severe applications with the strength of the flat tappet core. It became necessary for COMP Cams to make an entirely new pattern with ultimate strength and durability in mind. This unique design has joined lobes for increased strength throughout, as well as increased barrel size and improved machining. It is poured with a " Proferall 55' material, known widely for its strength and resistance to wear. For these reasons, the Competition Cams "Pro Core" is the finest flat tappet core available.
Q. What is an Xtreme Energy Cam?

A. Xtreme Energy Cams are CompCams newest series of hydraulic and hydraulic rollercams. They are designed to take advantage of the latest improvements in valve train components and the newest developments in camshaft design. Their aggressive lobedesign produces better throttle response and top end horsepower that other cams with the same duration @ .050", while delivering increased engine vacuum.

Q. When should 1 Use An Xtreme Energy Camshaft?

A. Xtreme Energy Cams cam be used in any street or street strip application where both throttle response and top end horsepower are desired.

Q. Con 1 Use An Xtreme Energy Cam With My Stock Valve Springs and Valve Train?

A. Because these camshafts use aggressive lobe designs it is imperative that valve springs, valve locks, retainers, pushrods, lifters, rockers and other related components be matched to the camshaft. We do not recommend the use of stock valve train components with Xtreme Energy Camshafts.
Q. What Is A Nitrous HP Camshaft?

A. Nitrous HP Camshafts are designed to maximize performance from engines equipped with nitrous oxide or supercharging, but the carefully tailored profiles deliver strong performances without nitrous; however, they offers incredible gains with nitrous.

Q. Why do Nitrous HP Cams Use Exhaust Profiles With so Much Duration?

A. The valve timing on Nitrous'HP Cams is designed to optimize exhaust scavenging under boost or nitrous assisted conditions. When we open the exhaust valve several degrees earlier, we are able to better scavenge the larger amounts of exhaust gases resulting from the nitrous and additional fuel.

Q. How Do These Cams Sound?

A. The earlier exhaust opening and longer duration make for a very pronounced sound. If you are looking for that "BAD BOY" camshaft sound, this is the cam for you.