April 2014 |
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or
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Custom Rigs PRo tiPs
Bruce Mallinson is the
owner of Pittsburgh
Power, an engine
performance shop in
Saxonburg, Pa.
Running 'free': Another key to making turbo boost
I
n February, I wrote
about free-flowing
air and how chang-
ing your muffler,
moving to dual ex-
haust and adding a second
air filter can help your en-
gine gain turbo boost and,
in turn, make your engine
more fuel-efficient.
If you followed those
recommendations, you're
nearly ready to install a
bigger turbocharger. First,
there's one more step you
need to take.
To enhance the air
and exhaust flow in your
engine, install a heavy-duty
high-performance ceramic-
coated exhaust manifold.
This manifold flows 20
percent or more exhaust
than a stock manifold, and
it will lower the exhaust
gas temperature by 125
degrees; it also will not leak
at the joints.
The extra exhaust flow
will allow the turbo to spool
up quicker, and the ECM
will see the turbo boost
sooner and release the fuel
earlier.
This will create quicker
acceleration, which will
spur the engine to live
longer, as exhaust gas tem-
perature is lower and there
is less soot in the oil. Also,
your fuel economy will
increase ¼ mpg.
Once this change and
the ones we discussed in
February have been made,
your truck is ready for the
larger turbocharger. You
will feel the difference in
performance, gain turbo
boost, decrease exhaust
gas temperature and even
gain another ¼ mpg in fuel
savings.
All of this brings you to a
total of about 1 mpg differ-
ence – about $16,000 a year
if you run 100,000 miles.
— Bruce Mallinson
ProTips_0414.indd 63 4/1/14 7:25 AM
