1) Replace Your Fuel Filter
2) Clean your Mill
3) Ditch the Passenger's Seat
4) Go Synthetic
5) Easy Breathing
6) Clean Your Injection
7) Flush That Cooling System
8) It's A Warp
9) A Clean Body Is A Goog Body
As in all sanctioned racing, the Amateur Import Racing Association has a set of rules for the welfare of all participants:
All vehicles must have working seatbelts
Vehicles quicker than 13.99 seconds require the driver to wear
a helmet
Vehicles quicker than 11.99 seconds, and convertibles quicker
than 13.99 seconds are required to have a 5 point
NHRA-approved roll cage, 3-inch shoulder harnesses (SFI
16-1compliant) with antisubmarine strap, and the driver must
wear a fire suit compliant with paragraph 3.2A-1.
Vehicles must have front and rear bumpers
You may replace the rear windows with Lexan or Plexi-Glas,
but "plastic wrap"is not permitted
Fuel cells must have filler necks vented outside vehicle
Nitrous bottles must be solidly mounted, with a pressure relief
valve and blow down tube vented outside vehicle
Radiator overflow catch can required
All rear wheel drive vehicles using slicks must have a
driveshaft saftey loop
Eliminators are one-run only
No alcoholic beverages in the pit area
Pit area speed limit: 5 mph
Ok, now with all that said and done, let's focus on the horsepower!
1) Replace your fuel filter! Unless yours is fairly new,
or
you know
your fuel systems' pressure to the injectors is ready for hard runs,
$20 for a new filter isn't going to hurt. Keep in mind that if yours is
dirty and clogged, the engine will run lean. This is, naturally very,
very bad if you are a nitrous or boost junky. On fuel injected
vehicles, be sure to relieve the residual fuel system pressure before
even thinking of putting a wrench to it. If in doubt, consult your
service manual or a qualified technician.
2) Clean your mill! A clean, degreased engine will run
cooler. It may
even get more "Oohs" and "Aahs" from members of the opposite sex,
and last longer to boot!
3) Ditch that passengers' seat! Take it from me, this is
well
worth the
effort. And oh, what minimal effort it is. Unbolting a
non-powered/non-heated passengers' side front seat will take you
about ten minutes, and save a good 60 pounds from your vehicle.
What's more, it's easy to reinstall. Where else on your car can you do
that?
4) Go synthetic! We've said it before, and we'll say it
again. There are
real horsepower gains to be found when switching to synthetic
lubes. A general rule of thumb: Whatever your engine is doing, it
will do more of when on synthetic. So if your mill is leaking and/or
burning oil, expect the leaking and burning to increase. Also, many
newer cars use ATF as the power steering lube. We here at Full
Throttle have seen switching to synthetic ATF gaining a good 1-2
horsepower, due to reduced steering pump drag! While we haven't
seen such gains using synthetic transmission lubes in transmissions,
the quicker shifts just might save you a tenth. For the crankcase, stick
to OEM oil filters. They are more reliable and flow better than
aftermarket units.
5) Easy breathing! There are numerous ways to help your
engine
suck up as much air as possible. This is called increasing volumetric
efficiency. It's easy enough to cut off the silencers and restrictions
from your stock intake air box and drop in a K&N stock replacement
air filter. These can be had from your local Pep Boys for about $45.
Better yet, get a 360 degree intake from a speed shop. Experience has
taught us that typically, more horsepower is to be gained from a free
flow intake than a free flow exhaust! Better still, is to unbolt your
intake air box altogether! Keep in mind that anything after the mass
air sensor, on so equipped vehicles, must not be touched; this will
not gain you anything good. We also find that putting huge bags of
ice on the intake manifold (ie. After the MAF) has no effect on
horsepower production, and occassionally will make a modified
engine run dangerously lean.
Other cheap 'n dirty ways to increase VE are to make your intake
into a ram-air style system. On cars like Integras and Civic del Sols,
this is easy! You already have 2 to 4 beautiful, big holes in the front
of your car! On others, simply removing the appropriate headlight,
and channeling airflow with foam rubber will give you a large CFM
increase (exponentially) at speed. I guess it would be trite
information to let everyone know that you can also use dryer outlet
hose, available at most hardware stores.
Let's not forget exhaust! The easiest way to get horsepower this way
is by simply unbolting everything after the downpipe. Even
"performance" exhausts will not get you as much horsepower as no
exhaust at all! Keep in mind that technically, if your car originally
came with a catalytic converter, you may not detach it. If you choose
to remove/unbolt it, don't cry to us if a cop fines you $2,500 for a
smog violation. Do you think it's worth the risk? $2,500 will buy a lot
of go-fast goodies! (Heck, you could buy ME for $2,500!)
6) Clean your injection! A dirty intake tract will not
allow an even
air/fuel distribution, and thus will prevent your engine from
realizing its' full horsepower potential. Get your fuel injectors power
cleaned. While this is pretty expensive (about $75), a good
alternative is to run a bottle of Red Line SI-1 fuel injector detergent.
It is not solvent-based and is fuel system friendly. Also, run a can of
GM Engine Top Clean. This is made for carburetted engines, but
will work on a fuel injected mill. Instead of pouring the liquid
through the throttle body, you unplug one of your vaccuum hoses
and stick it in the can. Pinch the hose so the engine doesn't stall,
keeping the fluid flowing at a steady pace. GM Engine Top Clean is
hard to come by these days, so you can subsitute water or ATF. If
you use ATF, be prepared to change your spark plugs, which will
foul.
7) Flush that cooling system! A properly maintained
cooling system
will allow you to run more consistent times. You could just drain
and refill the system, but the Full Throttle way of life would mean
you'd also use a chemical flush or backflush. We recommend
non-silicated/non-phosphated coolants, such as Dex-Cool. Mix with
50% distilled water and a bottle of Red Line Water Wetter. Replace
the thermostat with one of those newfangled high-performance units
by Stant, Robertshaw, or your OEM, in a temperature recommended
by the manufacturer. Using an exceptionally cold thermostat is a
common mistake made by tuners; cold engines do not get as good a
ring seal and will usually get worse fuel mileage. Unless you know
for a fact that using a cold thermostat will help, (ie. Your throttle
body coolant passages are blocked off, etc,) don't do it.
8) It's a wrap! Wrapping your exhaust system in an
insulative tape, if
you choose to run through mufflers, will also help increase
volumetric efficiency. Keeping the exhaust gasses hot will keep
them nice and light-weight (cold air is denser, remember?) A
constant exhaust gas temperature will also help keep your air/fuel
ratio constant, and lower back pressure due to a straighter gas flow.
Remember also that this will allow you to remove a bulk of the
exhaust heat shields under your car, thus saving weight!
9) A clean body is a good body. Have you any idea how
dirty a
throttle body's throttle plate can get? No, it's not dirt you can see by
removing your intake hose and looking down the (usually)
clean-as-a-whistle throttle bore. The dirt that hampers us is on the
back side! I've seen up to a quarter inch of grease and dirt (usually
from the EGR system) loaded up onto the back of a throttle plate!
While this may not seem so bad, just remember that at WOT, the
added thickness to the throttle plate will not allow your full,
deserved air flow.
Also, don't forget to follow general "Horsepower Rules". (And
believe me, horsepower RULES!) Unless you have hot ignition
timing, or another hot octane-hungry modification, run 87 octane
gasoline if that's what your vehicles' owner manual recommends.
Using higher octane will give you no benefits for drag racing, but
will definitely make your wallet thinner. However, for daily street
use, you may appreciate the increased quantity of fuel system
cleaning additives. If you drive a newer, OBD-II car with a knock
sensor, don't be afraid to run the highest octane fuel you can get
your hands on. While most "octane boost" formulas don't work too
well, I find that the 104+ brand actually does boost octane count.
Also remember, if you win your bracket, you get $500! ($250 for
trucks.) Good luck!
Questions? Comments? Dirty jokes? Email me!
Email the editor: [email protected]
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