Mallory Ignition 29806 User Manual
1
FUEL PRESSURE ISOLATOR
RECOMMENDED INSTALLATION
INSTALLATION INSTRUCTIONS
FORM 1169 06/03
GENERAL INFORMATION
1. Place the gauge to be used with isolator, fitting
end up. Install the #4 AN to 1/8 npt female adaptor,
supplied with the isolator, and fill gauge with a
50/50 mix of water and coolant. Install braided
stainless line on gauge. We recommend using
Mallory P/N 29831 (#4x3') or P/N 29832 (#4x6').
Fill line with the coolant/water mix and use cap
supplied to plug the line. A squeeze bottle works
well for this.
2. Drill a 3/4" hole in the firewall and route braided
stainless line from gauge through firewall and into
engine compartment. Cut one side of grommet and
install in firewall to prevent line abrasion.
3. Isolator must be mounted in the engine compartment. (NHRA rules do not allow the isolator to be
mounted on the firewall). Drill two clearance holes
for 1/4" bolts using the bracket as a template.
Mount the bracket using 1/4" bolts.
NOTE: Gauge and isolator should be kept as
close as possible to the carburetor level to
ensure accurate pressure readings.
4. Remove dust plugs from the isolator. Place isolator
on a level surface with screw heads facing down.
Fill isolator with the coolant/water mix, then install
the #4 O-ring fitting supplied. Top off the isolator
with the coolant mix. Hold the braided steel line
with plastic plug in the upright position regulator.
Remove the plug and quickly thread the braided
line on to the pressure regulator.
5. Remove two screws from the isolator housing and
install isolator on the bracket. Install the remaining
#4 O-ring fitting in the isolator housing.
6. Thread #4 line on the remaining fitting. We
recommend using the Mallory braided stainless
line P/N 29831 (#4x3') or P/N 29832 (#4x6').
Connect the opposite end of the line to the
vehicle’s fuel system.
MALLORY IS A DIVISION OF THE MR. GASKET PERFORMANCE GROUP
10601 MEMPHIS AVE. #12, CLEVELAND, OH 44144
216.688.8300 FAX 216.688.8306
www.mrgasket.com
FORM 1169
06/03
Made in U.S.A.
Printed in U.S.A.
PRESSURE
ISOLATOR
BLACK
TO ENGINE GROUND
RED
TO 12v LIGHTING
CIRCUIT
BRAIDED
STAINLESS TUBING
NOTE: THIS SIDE OF ISOLATOR MUST BE FILLED WITH A
50/50 MIXTURE OF WATER AND AUTOMOTIVE
COOLANT.AIR ON THIS SIDE OF ISOLATOR WILL
RESULT IN INACCURATE PRESSURE READINGS.
ADAPTOR P/N #44876
(I/B NPTF to #4 FLAIR)
GROMMET
FUEL GAUGE
FIREWALL
TO FUEL LINE
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