By Nathan Morris of UltimateResourceGuides.com

What if I told you that you can gain 5 horsepower this
weekend, for less than $50? Or, what if I told you that you could
gain 5 horsepower this weekend, for less than $15?

I bet you'd be interested eh?

Well, the good news is, I'm going to tell you how to gain
5 horsepower this weekend for $0-15 spent. Sound too good to be
true? Well, read on!

1) Increase the H2O ratio in your coolant - if it weren't
for corrosion and freezing concerns, automotive makers
would use pure water. Water cools much better than coolant
any day of the week, and a cooler engine is a better performer.
Instead of half and half, try 40/60. DO NOT use pure water,
As this may cause premature corrosion and that can be no
fun at all to clean up. You may also try water wetter to further
enhance this effect.

2) Index your spark plugs - this is an age old trick that is
good for about 1 extra pony. The idea here is to "aim" the
open end of the spark plug terminal (the gap) towards the
intake side of the head. In order to accomplish this, simply
mark on the plug a small line to indicate where this gap is,
and install the plug as normal.

Try to line up the line with the intake side as best as you can.
It may require buying 2 sets of spark plugs in order to do this,
but hopefully you'll be able to do this the first time. Be
careful with aluminum heads not to over tighten, as that could lead
to a costly repair.

3) Relocate IAT Sensor - This is a very simple modification that
will work on a great deal of fuel injected vehicles. The IAT sensor
(“Intake Air Temperature”) tells the computer how hot or cold the
incoming air is. The computer will then adjust the amount of fuel
being injected, as well as make minor adjustments to timing based
on that reading.

The problem is that in many vehicles, the IAT sensor is located in
the intake manifold, near the cylinder head. Therefore the air that the
IAT sensor “reads” is much hotter than the air, say, in the intake arm.
The idea with this mod, is to relocate the sensor to the intake arm.
Use JB Weld or similar to patch up the old port for the sensor.

This will cause the computer to believe that incoming air is slightly
cooler, causing it to inject more fuel and advance the timing a tad.

4) Synthetic Oil - This is guaranteed to pick up 1-2 horsepower, as
multiple dynos over the years have proved this fact. Simply
by switching to a true synthetic oil this weekend you can reduce
the friction in your engine, improving efficiency, and therefore going
faster.

5) Insulate Fuel Lines - When your fuel lines travel through the
engine bay they heat up. However, cooler fuel produces more power for
more reasons than just cooling down the intake charge--although that
certainly helps things! So, to improve power output, simply purchase
some refrigerator/air conditioning insulation and wrap the fuel lines
with the insulation. While you're at it, you may wish to go ahead and
do this to the intake arm as well for even more power.

Interested in more cool free, cheap, and lesser known modifications?

Click below!

The Definitive Guide to Low-Buck
Performance: Best Kept Secrets of Top Racers

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