Modifying my
engines throttle body is probably the most noticeable performance
modification Ive performed or installed on my truck. I installed it a few months after the
exhaust system, and it felt like a new truck. It cost me nothing but time, and my performance has a real seat
in the pants kick to it now, throttle response is significantly smoother and
quicker, and my fuel efficiency has increased by another 10%. The goal here is to allow more air to flow
more easily into the throttle body by removing restrictive objects from the
flow path. This is a relatively easy
modification and is hard to screw up if you do it like I did. My method would be considered the
beginners level of modifying a throttle body, considering that I didnt
enlarge the throttle bores and blades, or thin the blades and shafts.
Instructions
1)
Remove the air hat bolt
from the throttle body, as well as all the sensors on the sides.
2)
Remove the throttle body from the intake manifold.
3)
Place the throttle body
lightly in a vice or clamp so the top surface of the throttle body is easily
accessible. Use a hack saw to remove
the ridges that surround the bores, and then grind them down until
flush.
4)
Now use a metal file
with a round side and radii the edges of the bores. Use smooth unidirectional strokes (like when sharpening an axe)
for a smoother surface.
5)
I used a wire wheel to
smooth everything off even more, figuring it couldnt hurt anything.
6)
Clean the entire
throttle body thoroughly, and reattach all the sensors.
7)
Instead of reinstalling
the stock air hat bolt, I made an s-bolt by taking a piece of matching
threaded stock and bent it so that that it would line up correctly.
8)
Put everything back
together, and bolt the throttle body on with a new gasket.
9) I
recommend resetting the trucks computer now. You dont have to, but the computer will adjust to the new
airflow more quickly if you do. Just
disconnect you battery and turn the key to the ON position for a minute or
two. Then reconnect the battery and
drive normally for 50 miles or so.
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