Edelbrock 305 Instruction manual

©2010 Edelbrock LLC
Rev. 10/10 - AJ/mc
Brochure #63-3702
Part #3702
PERFORMER-PLUS CAMSHAFT / LIFTERS / LUBE KIT
PART #3702
305 c.i.d. 1987-1995 5.7L TBI Chevrolet V8 LG-4 engines
(1981-1987)
GENERAL INSTRUCTIONS
• Please study these instructions carefully before you remove your stock camshaft. If you have any questions or problems, do not hesitate to con-
tact our Technical Hotline at: 1-800-416-8628.
• These instructions are designed to give general installation guidelines. A complete step-by-step procedure manual would require many pages. If
you are a novice or just learning to work on automotive engines, we recommend consulting either Chilton or Motors automotive manuals before
you begin. You may also wish to contact an experienced mechanic. Be advised: improper installation may result in LOW MILEAGE, POOR PERFOR-
MANCE, COSTLY REINSTALLATION AND EVEN ENGINE DAMAGE. Installing a camshaft is a complex procedure. Please follow these instructions
carefully. Failure to do so may void your warranty.
• Before you begin the removal and installation process, please examine the kit for possible shipping damage. If the camshaft is damaged, contact
your dealer immediately. Also, make sure you have all the recommended tools and parts as listed below. As you read through these instructions
the first time, use the preparation checklist to check off the exact items you will need.
• Performer-Plus camshafts are ground specifically for use with the corresponding Performer manifold #3701 (#3706 for 1987 engines). Both are
dyno-matched and street proven to work as a team; especially when matched with the Edelbrock Micro Plus ignition computer and Edelbrock
Tubular Exhaust Systems. However, the Performer camshaft package may be used by itself.
Tools & Equipment For Installation
Box and open end wrenches
Socket set
Distributor wrench
Pliers (channel locks & hose clamp)
Screw drivers (regular and phillips)
Torque wrench
Hammer
Gasket scraper or putty knife
Timing light
Vacuum gauge
Rags
Water bucket
Harmonic balancer puller
Masking tape (for tagging hoses and electrical wires)
Engine oil & filter
Crankshaft dampener puller
Hardware & Parts To Buy
Gaskets - Edelbrock, OEM or equivalent
Pipe plugs, if needed
Edelbrock Gasgacinch #9300
RTV Silicone
Chalk
Paper and pencil
Radiator coolant
Edelbrock Sure Seat Valve Springs, #5802 or #5902 (for rotators)
Edelbrock Performer-Link True Rolling Timing
Front cover oil seal, OEM or# equivalent
Chain and Gear Set #7800/#7802
Teflon tape
Edelbrock Break-In Oil, #1070
BEFORE BEGINNING: If the Air Conditioning condenser needs to be
removed to provide clearance for camshaft removal, have the system
evacuated by an appropriate repair facility BEFORE starting the installa-
tion. The same facility can recharge the system after installation.
REMOVAL OF ENGINE PARTS BEFORE CAMSHAFT INSTALLATION
Be sure to keep all parts in order. WARNING! DO NOT REMOVE RADIA-
TOR CAP OR RADIATOR HOSES WHILE ENGINE IS HOT!
1. Disconnect the battery.
2. Drain radiator coolant. Drain plug will normally be located on lower
right or left side of the radiator facing the engine.
3. Remove radiator and air conditioning condenser if so equipped. In
some cases, the front grille may have to be removed. Measure dis-
tance from front cover to grille or brackets that may interfere with
camshaft against the length of the camshaft.
4. Remove the gas cap to relieve pressure. Disconnect fuel line and
plug. Replace gas cap.
PREPARATION CHECKLIST
NOTE: Sure seat springs #5902 not applicable to cylinder heads
1977 and later with casting #14014416. These heads must use
Edelbrock spring set #5802.
5. Disconnect all linkage from carburetor such as throttle, throttle
springs, transmission, cruise control and automatic choke.
6. Tag and remove coil wires and sensor wires.
7. Tag and remove vacuum lines.
8. Remove valve covers.
9. Remove distributor cap and wires, rotate engine until rotor points
towards number 1 terminal in cap and pointer on front cover is on
top dead center (TDC) and remove distributor. Note the approximate
position of the distributor housing in relation to the manifold to assist
in getting the distributor properly located during re-installation.
10. Remove carburetor and intake manifold. Remove and discard intake
manifold gasket.
11. Remove rocker arms and pushrods.
12. Remove hydraulic valve lifters.
13. Remove crankshaft pulley, and using a suitable puller, crankshaft
dampener.

©2010 Edelbrock LLC
Rev. 10/10 - AJ/mc
Brochure #63-3702
Part #3702
14. Loosen oil pan and remove water pump and front cover.
NOTE: The front cover oil seal should be replaced before the front
cover is re-installed.
15. Remove fuel pump and fuel pump pushrod. Rotate engine until tim-
ing marks are aligned as in Figure 1.
16. Remove bolts retaining camshaft sprocket. Remove sprocket and
chain.
17. Remove crank sprocket using a gear puller to remove sprocket.
18. Remove camshaft.
• VALVE SPRINGS—WARNING ABOUT YOUR WARRANTY
In order for this Performer-Plus cam and lifter kit to be covered
under ANY WARRANTY you must use either the correct Edelbrock
Sure Seat valve springs or the stock original equipment valve
springs. Failure to do so could cause the cam lobes to wear exces-
sively and could cause additional engine damage.
1. This camshaft is designed to function either with the stock springs
or with Edelbrock Sure Seat valve springs #5802 (std. retainer set),
or for rotators, use #5902.
2. For older vehicles and vehicles with high mileage we highly recom-
mend replacing the valve springs with Sure Seat Valve Springs #
5802 (std. retainer set), or for use with valve rotators, #5902.
NOTE: Sure Seat Springs #5902 not applicable to cylinder heads
1977 and later with casting #14014416. These heads must use
Edelbrock spring set #5802.
3. Check spring height and set to factory specifications for correct year
and model. DUE TO THE MANY POSSIBLE SETTINGS OVER THE
YEARS, WE ADVISE CHECKING MOTORS, CHILTON, OR FACTORY SER-
VICE MANUALS FOR CORRECT SPRING HEIGHT FOR YOUR VEHICLE.
• LIFTERS
1. New lifters must be used with a new camshaft. Use only the lifters
supplied with your kit.
2. Check to make sure all lifters fit freely in lifter bores.
• INSTALLATION INSTRUCTIONS
1. Coat cam lobes and bottom of each lifter with MOS2 lube supplied
with your kit. THIS WILL PREVENT CAM LOBE AND LIFTER WEAR
FROM OCCURRING DURING INITIAL ENGINE START UP.
2. Install new camshaft with new sprockets and timing chain.
CAUTION: When using Performer-Link True Rolling Timing Chain and
Gear Set #7800/#7802 with an Edelbrock cam and lifter kit, straight
up timing alignment is achieved. If any other timing gear set is used,
it is necessary to check camshaft position for correct timing align-
ment. This requires indexing the camshaft with a degree wheel to
verify timing alignment. O.E.M. or non-Edelbrock timing gear sets are
not recommended for use with Edelbrock camshafts. Use locking
compound material on bolt threads holding gear to cam. Torque to
factory recommendations specified in Motors or other repair manual.
3. Install camshaft with timing marks lined up as recommended by fac-
tory specifications. See Figure 2.
• PUSHROD AND ROCKER ARM INSTALLATION
After the cam is installed and timed correctly (see Figure 2), install
pushrods, lifters and rocker arms.
• VALVE ADJUSTMENT
1. Turn the engine over until the No. 1 cylinder exhaust lifter starts to
move up. At this point install adjusting nut on intake rocker arm and
adjust to zero clearance between rocker arm and valve. From this
point turn adjusting nut down (clockwise) 1/2 turn more for final
adjustment.
2. Turn the engine over again until the intake lifter just stops coming
down. At this point install adjusting nut on exhaust rocker arm and
adjust to zero clearance between rocker arm and valve. From this
point turn adjusting nut down (clockwise) 1/2 turn more for final
adjustment.
3. The above procedure assures correct hydraulic lifter preload. Repeat
this procedure for each of the other seven cylinders.
4. Install front timing cover with new gasket.
NOTE: Install new seal between oil pan and front cover if old seal is
damaged after removal. Use RTV silicone sealant on seal to ensure
proper seal to pan.
5. Torque front timing cover bolts to 6-7 ft./lbs.
6. Install front harmonic balancer and torque to 60 ft./lbs,.
7. Install fuel pump and push rod.
8. Install water pump using new gaskets and torque to 30 ft./lbs.
9. Install intake manifold using new intake gasket set and torque bolts
to 25 ft./lbs.
• DISTRIBUTOR INSTALLATION AND ENGINE TIMING
1. Turn the engine over in direction of rotation until the No. 1 intake
valve closes and continue until the pointer on the front cover is
approximately five degrees before top dead center (BTDC). See
Figure 1 for firing order.
2. Re-install the distributor with the rotor pointing towards No. 1 termi-
nal in the cap, and with the distributor housing in its original posi-
tion. If distributor will not drop down all the way to the flange on the
manifold, it will be necessary to align the distributor shaft with the
oil pump drive. Slowly rotate the engine until the distributor drops
down against the manifold, then continue turning until two complete
revolutions are completed and the timing marks once again come to
five degrees BTDC.
3. Lightly tighten the hold-down clamp so that the distributor can still
be turned to determine final setting using a timing light with the
engine running.
4. Replace valve covers, carburetor linkage and remaining vacuum and
electrical connections.
5. Engine oil and filter should be changed before start-up and again
after camshaft break-in.
• CAMSHAFT & LIFTER RUN-IN
IMPORTANT: DO NOT ALLOW THE ENGINE TO RUN UNDER 2000
RPM FOR THE FIRST 1/2 HOUR. Slow idle speeds may result in
severe cam and lifter wear. Vary engine speed between 2000 and
2500 rpm.
START THE ENGINE AND BRING TO BREAK-IN RPM.

©2010 Edelbrock LLC
Rev. 10/10 - AJ/mc
Brochure #63-3702
Part #3702
Figure 1—305 c.i.d Chevrolet
Firing Order – 1-8-4-3-6-5-7-2
Turn distributor counter clockwise to advance timing
IMPORTANT NOTES AFFECTING YOUR WARRANTY
• CAM LOBE WEAR
Cam lobe wear is almost non-existent unless mismatched parts are
used or installation of the cam and lifters is done improperly. Most
cam damage is caused by the timing gear loosening due to improper
torque on bolts. Bolts holding gear to camshaft should be torqued
carefully and a locking compound applied to threads of bolts. Before
installing your new Performer-Plus camshaft, check the gear drive on
the distributor and oil pump for any signs of wear. If worn, be sure to
replace with a new gear or you may wear out your camshaft prema-
turely. High-volume oil pumps are not recommended with Performer-
Plus camshafts. Edelbrock camshafts are designed to use O.E.M.
type gears only.
• CAM GEARS AND CAMSHAFT END PLAY
If cam gear becomes loose, the cam will slide back in the block,
causing the lifters to hit the lobes next to them and also the cam
bearing journals. If the engine is run after this happens, the bottom
of the lifters and the sides of the lobes will become chipped.
• TUBULAR EXHAUST SYSTEM
For best performance, a tubular exhaust system is recommended
with the Performer package to provide the most low-end torque.
Please consult your Edelbrock dealer or the Edelbrock catalog for a
listing of available Edelbrock Tubular Exhaust Systems. Be sure to
check local emission control regulations for legality of camshaft and
exhaust system changes.
Figure 2— Timing Chain Sprocket Alignment
Timing
Marks
• LUBRICATION:
Use Edelbrock Break-In Oil or Edelbrock Zinc Oil Additive in combina-
tion with your regular oil to give your engine maximum protection
during the break-in period. Once break-in has been completed,
drain the oil and replace it with Edelbrock High Performance Motor
Oil for the best in anti-friction wear protection.
• IMPORTANT NOTE:
When using Performer-Link timing chain and gear set (#7800 or
#7802) with an Edelbrock cam and lifter kit, straight up timing align-
ment is achieved. If any other timing gear set is used, it is necessary
to check camshaft position for correct timing alignment. This
requires indexing the camshaft with a degree wheel to verify timing
alignment. O.E.M. or non-Edelbrock timing gear sets are not recom-
mended for use with Edelbrock camshafts.
• SPECIAL NOTICE:
Edelbrock Performer-Plus camshaft/lifters/lube kit #3702 has
received E.O. #D-215-19 making them legal for street use on pollu-
tion-controlled motor vehicles in all 50 states. To assist you with
emissions equipment certification, we have included a fan shroud
decal to help testing personnel verify that the camshaft is a legal
replacement part for small-block Chevrolet/GMC vehicles. The adhe-
sive-backed decal should be affixed to your fan shroud next to the
existing emission and engine specification decal. Do not cover your
original equipment specification decal with the Edelbrock Performer-
Plus camshaft decal.

©2010 Edelbrock LLC
Rev. 10/10 - AJ/mc
Brochure #63-3702
Part #3702
CAMSHAFT: Performer-Plus
PART: #3702
ENGINE: 305 c.i.d. Chevrolet V8 LG-4, 1981-1987
RPM RANGE: 1500-5500
CAUTION:
Use only Sure Seat Valve Springs, #5802 or 5902
Use stock ratio rocker arms only
Duration at 0.006" Lift: Intake 244° Exhaust 264°
Duration at 0.050" Lift: Intake 194° Exhaust 214°
Lift at Cam: Intake 0.265" Exhaust 0.294"
Lift at Valve: Intake 0.398" Exhaust 0.442"
Timing at 0.050" Lift: Open Close
Intake 10° ATDC 24° ABDC
Exhaust 44° BBDC 10° BTDC
Intake Centerline: 107° Lobe Separation: 112°
CAUTION: Use Performer-Link Timing Chain and Gear Set, #7800 . Do
not use late model timing sets. They are machined in a retarded
position and are not recommended for this camshaft installation.
Edelbrock Performer-Link True Rolling Timing Sets feature three key-
ways for specific timing selection. Always use the “0” or straight-up
timing marks when installing Performer-Plus camshafts with
Performer-Link Timing Sets.
CAMSHAFT: Performer-Plus
PART: #3702
ENGINE: 305 c.i.d. Chevrolet V8 LG-4, 1981-1987
RPM RANGE: 1500-5500
CAUTION:
Use only Sure Seat Valve Springs, #5802 or 5902
Use stock ratio rocker arms only
Duration at 0.006" Lift: Intake 244° Exhaust 264°
Duration at 0.050" Lift: Intake 194° Exhaust 214°
Lift at Cam: Intake 0.265" Exhaust 0.294"
Lift at Valve: Intake 0.398" Exhaust 0.442"
Timing at 0.050" Lift: Open Close
Intake 10° ATDC 24° ABDC
Exhaust 44° BBDC 10° BTDC
Intake Centerline: 107° Lobe Separation: 112°
CAUTION: Use Performer-Link Timing Chain and Gear Set, #7800 . Do
not use late model timing sets. They are machined in a retarded
position and are not recommended for this camshaft installation.
Edelbrock Performer-Link True Rolling Timing Sets feature three key-
ways for specific timing selection. Always use the “0” or straight-up
timing marks when installing Performer-Plus camshafts with
Performer-Link Timing Sets.
CAMSHAFT: Performer-Plus
PART: #3702
ENGINE: 305 c.i.d. Chevrolet V8 LG-4, 1981-1987
RPM RANGE: 1500-5500
CAUTION:
Use only Sure Seat Valve Springs, #5802 or 5902
Use stock ratio rocker arms only
Duration at 0.006" Lift: Intake 244° Exhaust 264°
Duration at 0.050" Lift: Intake 194° Exhaust 214°
Lift at Cam: Intake 0.265" Exhaust 0.294"
Lift at Valve: Intake 0.398" Exhaust 0.442"
Timing at 0.050" Lift: Open Close
Intake 10° ATDC 24° ABDC
Exhaust 44° BBDC 10° BTDC
Intake Centerline: 107° Lobe Separation: 112°
CAUTION: Use Performer-Link Timing Chain and Gear Set, #7800 . Do
not use late model timing sets. They are machined in a retarded
position and are not recommended for this camshaft installation.
Edelbrock Performer-Link True Rolling Timing Sets feature three key-
ways for specific timing selection. Always use the “0” or straight-up
timing marks when installing Performer-Plus camshafts with
Performer-Link Timing Sets.
CAMSHAFT: Performer-Plus
PART: #3702
ENGINE: 305 c.i.d. Chevrolet V8 LG-4, 1981-1987
RPM RANGE: 1500-5500
CAUTION:
Use only Sure Seat Valve Springs, #5802 or 5902
Use stock ratio rocker arms only
Duration at 0.006" Lift: Intake 244° Exhaust 264°
Duration at 0.050" Lift: Intake 194° Exhaust 214°
Lift at Cam: Intake 0.265" Exhaust 0.294"
Lift at Valve: Intake 0.398" Exhaust 0.442"
Timing at 0.050" Lift: Open Close
Intake 10° ATDC 24° ABDC
Exhaust 44° BBDC 10° BTDC
Intake Centerline: 107° Lobe Separation: 112°
CAUTION: Use Performer-Link Timing Chain and Gear Set, #7800 . Do
not use late model timing sets. They are machined in a retarded
position and are not recommended for this camshaft installation.
Edelbrock Performer-Link True Rolling Timing Sets feature three key-
ways for specific timing selection. Always use the “0” or straight-up
timing marks when installing Performer-Plus camshafts with
Performer-Link Timing Sets.
©2010 Edelbrock LLC
Rev. 10/10 - AJ/mc
Brochure #63-3702
Part #3702