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B1 Series
Cylinder Heads
Installation
Instructions
Check piston to head clearance.
Check valve stems for burrs created by
number stamps or mishandling.
Check valve to piston clearance. It will be
necessary to machine valve reliefs on pistons
with stock valve locations.
Bronze guides should be wet-honed for
clearance. A good cross-hatch pattern is
desirable for initial oil retention.
Torque head to 75 ft-lb using increments of
no more than 20 ft-lb. Care should be taken
to check the length of the top row of head
studs. It may be necessary to shorten these
studs to avoid interference with rocker arms.
A re-torque of heads after initial warm-up is
desirable, preferably after engine is allowed
to cool completely.
Heads have a 68 cc combustion chamber
out of the box. They may be fl at milled as
much as .130 in. at a rate of .0057 in. per cc.
The intake correction rate is .010 in. per .010
in. removed from the deck.
Valve stems should be lubricated with cam
lube or a lubricant which will stay in the guide
until the engine is warm and suffi cient engine
lubricant is oiling the valve and guides.
Recommended valve clearances: .0015 Intake
and .00175 Exhaust. Use an oil and STP
mixture for lubrication of valve guides.
Most bronze valve guide wear problems
are created in the initial preparation
and engine warm-up. Bronze guides
ABSOLUTELY cannot be run dry, even
for a second. If a valve stem is used, the
neoprene-tefl on insert type is desirable.
A tight seal is not recommended.
Check pushrod clearance with the head
installed on the engine block that will be used.
Use Anti-Seize compound on all bolts and
spark plug threads.
Champion ‘C’ Series spark plugs are
recommended. Gasoline cars can start with a
C 59YC. This is only a recommended starting
range. You may discover that a colder
or hotter plug will work better with your
combination.
Put large fl at side of spark plug gasket
next to head.
Rights Reserved: Brodix, Inc. reserves the right to make any changes in design, materials, specifi cations, and manufacturing procedures used in its products, or to discontinue any product at its sole discretion and without any liability with
respect to similar products already in the fi eld.
Not legal for sale or use on pollution controlled motor vehicles Revised: 6/8/09 ©2010 BRODIX, Inc.
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Dyno tests have shown that engines of
499 cu. in. or larger perform best with
35-36 degrees of timing, and 38-39 degrees
for 420-470 cu. in. engines. These tests
were conducted using MSD 7A components.
Attempts to use more timing than this could
result in damage to engine components.
Because of the high-fl ow design of the
exhaust port, porting should be limited to
radiusing the seat and matching the port
immediately below the seat to the i.d. of the
exhaust seat insert. Smoothing the remainder
of the port is acceptable, but substantial
removal of material could be
counter-productive.
Warning - Please be advised that heat
soaking aluminum heads above 250 degrees
Fahrenheit can drastically affect the hardness
of the head. There are cleaning techniques
being introduced into the market that utilize
high heat to remove oil, etc. from castings.
WE DO NOT RECOMMEND THE USE OF
HEAT TO CLEAN THESE HEADS.
Please feel free to call or write should a
problem or question arise.
We have a complete repair service available
in the event of damage to the heads.
Rocker stands should be mounted using the
B1 stand hardware kit. This kit includes 10
3/8 studs and 6 5/16 studs that should be
installed on rocker pads (above the intake
ports).
Nylatron rocker spacers may need to be
deburred with emery cloth or sand paper to
allow a proper fi t on the rocker shaft.
Please check these heads thoroughly in
every possible way. If you suspect a defect
is present, contact Brodix or B1 before any
work has been done.
NOTE - The use of external oil drain downs
from the heads to the oil pan is highly
recommended for better oil control and
greater performance.
Warranty: The products listed in this
brochure are sold without any express
warranty of merchantability or fi tness for
the intended purpose. Where that purpose
is competitive racing, they are sold with no
warranty whatsoever.
We have a complete repair service available,
in the event of damage by engine failure, etc.
We also stock oversized guides and seats.
Please feel free to call or write should a
problem or question of any nature arise.
479-394-1075
It would be advisable to groove the
P.O. BOX 1347 ~ 301 Maple Ave. ~ MENA, AR 71953
Fax 479-394-1996
number 4 cam journal to provide adequate
oiling to the rocker arms.
Not legal for sale or use on pollution controlled motor vehicles ©2010 BRODIX, Inc.
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