there are a number of choices with respect to connection to the fuel supply
for your new carburetor
you'll either have a single feed 4160 with a single inlet bowl
a dual feed 4160 with separate inlets for each fuel bowl
or you'll have a 4150 model which will also have dual feed bowls
the difference between the dual feed 4160 and dual feed 4150 models
is that there's no secondary metering block on the 4160 models
so the distance from center to center of the ball inlets
is shorter when compared to the forty one fifty models to start the connection
process let's look at the fuel line
some stock carburetor types had steel fuel lines that ended in flare
compression fittings
some steel lines will fit directly to the inverted flare fitting that comes in
place on most single inlet fuel bills
this can be the case for many 4160 4165 and 4175 applications
sometimes all that will be needed is to remove the existing flare fitting
and replace it with one that matches the threading of your existing fuel line
if you're steel lines won't match with the position of you're new Holley
carburetor
you may need to make an adjustment in this case you can you change the entire
fuel line from the fuel pump to the carburetor
with your plumbing supplies from Earl's or you can modify the existing lines and
fittings
to work with your new carburetor one popular choice is to use a tubing cutter
to remove the end to the fuel line ends in a compression fitting
you can also use this tool to modify a few line that might be pointing in the
wrong direction for the few entry point on your new carburetor
when slipping a fuel hose onto a cut line that has no bar
make sure the inner diameter the hose matches to the outer diameter
of the metal line outer diameters of steel lines will match either a 5/16ths
or 3/8ths of an inch inner diameter fuel hose
that should be available at any auto parts store it's also a good idea to use
2 hose clamps to help prevent a fuel leak
the next item along the fuel line should be a filter such as Holly part number:
162-563 every carburetor
should have been in line filter located between the fuel pump
and the carburetor inlet for dual feed carbs the filter needs to be installed
just after the main fuel line
and before any fuel line splits also be sure to examine the filter
for a label that shows which side is the inlet so the its installed in the
correct orientation
for single feed carburetors if your fuel hose inner diameter
is 5/16ths of an inch you can use the non swivel part number 26-24
or the swivel banjo fitting part number: 26-25
for the banjo fitting start with one gasket on one side the banjo
and another gasket on the other side remove the compression fitting
from the carburetor and swap the brass or screen filter
from the compression fitting into the banjo fitting then sinch the assembly in
place at your preferred
angle and tighten snugly use the exact size wrench to prevent rounding off a
corner of the banjo fitting
if you have a 3/8ths inch inner diameter fuel hose
you need to use part number: 26-29
there are also options for connecting AN style fittings to a single feed
carburetor
by using part number 26-75 for dual feed carbs there are a lot of choices
part number 34-150 is meant for use
with 4150 models if you're 41-160
has Center hung float bowls you'll need part number 34 gash 160
which is a bit shorter because as mentioned the 41-60s
have no secondary metering block both lines are stamped with their intended
model number usage
Center hung bowls come with the fitting number 26-27 pre-installed
this fitting screws into the 7/8ths 20 thread count of the bowl
and has a 5/8ths 18 thread count inverted flare
to accept the fuel lines you can remove these fittings and use one of a lot of
different offerings from
Earl's like part number 101276ERL
there are other aesthetics as well
such as the 103176 which has bent
lines and all of the equivalent Earl's products are available
in the Ano Tuff Series with silver and black coloring
Street Avenger carburetors come with all the fuel line connection pieces you'll need
to get your carburetor connected to a fuel supply
if you want to use the included parts install the fuel line fittings
first and then the hose pieces if your fuel line is at the front of the engine
the longer pieces go to the rear Bowl and then the shorter one to the front bowl
join the two hoses with the included Fuel tee and you'll have a 3/8ths entry
point
for fuel coming from your fuel line or filter for models other than the
Avenger series the most economical
and cleanest looking set-ups will be any of the one piece hard lines that we
mentioned earlier
now that the fuel feed line is in it's time to finish off the fuel supply
connection
if you have a hard line installed all you need is one of the 34-21
or 34-22 adapters
hold the line in place with the wrench and cinch it on nice and tight
also make sure that you pulled the pressure tap plug and sealed it with a
liquid Teflon sealant
don't use teflon tape pieces can break off inside and they might even cause
clogs or even fuel flooding
be careful about your routing to make sure that your fuel line and filter
don't interfere with any other underhood components
in the advanced tuning section we show you how to properly fill the bowls with
fuel to prepare for start-up
but for now let's move on to the last few steps of the installation