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
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
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
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
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
Q. Will 1 have to run higher compression with a High Energy
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
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
Q. Do I have to re-jet my carburetor when I install a High
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
Q. How much power and mileage can I expect from a High
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
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
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
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.
DUAL ENERGY Q & A
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
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
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
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
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
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.
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"
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'
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
Q. Will it be necessary to change my torque converter with a
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
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
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
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
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
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
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
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
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
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
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.
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
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.
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
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
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.