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Free/Cheap Mods - Gain 5HP Over The Weekend

 
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Old 09-27-2008, 03:26 AM
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Free/Cheap Mods - Gain 5HP Over The Weekend

ok so while GOOGLEin around i found this. not sure if it is for real but figured i'd share and it seems to be dyno proven. it all makes sense. i copy and pasted the page so if you want the pics click the link below...
http://www.ultimateresourceguides.co...-freemods.html

free mods Prelude, free mods 97-01 Prelude

GAIN 5 HORSEPOWER THIS WEEKEND
For Almost No Money Spent

by Nathan Morris

If you're looking for free & cheap ways to increase the horsepower output of your engine - I've got just the thing for you.

I want to share with you 6 cheap or in some cases, even free ways that you can gain horsepower.

I hope that you will enjoy these 6 awesome modifications for your car, and without further delay - let's get started!

Modification Number One: Index Your Plugs

The next time you are doing a tune-up on your ride, be sure to take note of this modification. By simply installing your plugs in a particular way, you will pick up roughly 1 whp, dyno proven time and time again.


As illustrated above, in order to perform this mod, mark the side on which the "open end" of the spark plug faces. Proceed to install them as you normally would, except when the plug is hand-tight (that is, you've screwed it in without a ratchet as far as it'll go), use your ratchet to tighten the plug until the open end of the plug, faces the intake side of your cylinder head. That's it!

Modification Number Two: Insulate Fuel Lines


Under-hood engine heat is a serious performance robber in almost all cars. Not only does the under-hood heat cause performance loss by heating up the intake air, but it also causes performance loss by heating up the fuel lines. Cooler fuel will help cool the intake charge, as well as provide for a better overall mixture.

In order to get this stolen power back, simply go down to your local hardware store and purchase a roll of refrigerator and air conditioning insulation. Wrap all of your under-hood fuel lines with the insulation to keep the cool in, and the hot out.

Modification Number Three: Relocate IAT Sensor
In most fuel injected vehicles you will find a sensor that measures intake air temperature. You will need to refer to your factory service manual to find its location.

At any rate, it is very typical to find the IAT sensor mounted inside the intake plenum that is very often heated heavily by coolant and the cylinder head. This is fine of course, since the original equipment manufacturer designed it to work this way. However, there is a way to "trick" the engine computer into thinking that the incoming air is a little cooler than it really is, and therefore get the ECU to advance the timing a small amount and increase fuel supply at the same time.

In most mildly modified vehicles, this will create a more desirable fuel and ignition map and create a few extra horsepower.

In order to perform this mod, simply locate the sensor and remove it from the intake manifold. Fill in the hole with JB weld and proceed to remount the sensor somewhere in the intake arm. Seal everything up well, and you're done.

Modification Number Four: Synthetic Oil
In the past 3 years I have been running various types of oils through my engines and have found that for the most part - all oils are the same, power wise. However, Synthetic oils definitely make more power over standard "dino" oils. In fact, I have consistently seen anywhere from 2-3hp across the rev range from using a true synthetic versus a standard oil.

Therefore, next time you change oils, switch to synthetic. Even on a high mileage engine, it works wonders. It is also a far better lubricant and protector of your engine.

Modification Number Five: Increase H2O Ratio In Coolant
If it weren't for corrosion and freezing concerns, automotive makers would use pure water to cool your vehicle. Straight water cools better than coolant any day of the week, and a cooler engine is always going to produce more horsepower.

Instead of a typical half and half ratio, try 40/60. However, NEVER use pure water, as this may cause premature corrosion which will cause a costly repair bill. You may also try water wetter to further enhance the effect, but be cautioned that water wetter should only be used for track purposes.

Modification Number Six: Throttle Body Coolant Bypass
This one I saved for last, and for good reason. This is perhaps one of the best modifications that you can do for basically nothing. As you'll see in the dyno below, which is of my Integra LS motor in a 92 Civic hatchback, before and after: I got back almost 10ft-lbs of torque over the entire rev range. 10ft-lbs that was present in the engine when completely cool, but once at operating temperature was no longer available. This is good for about 0.2 seconds in the quarter mile in my particular vehicle - needless to say I'm very pleased with this modification.

Above you see a diagram of how coolant normally flows through a throttle body (illustration is from an Accord). All you need to do on any vehicle is to take those two coolant lines, disconnect them from the throttle body and connect them with a coupler available in the vacuum hose section of your auto parts store. It's basically two nipples connected to each other that allow you to connect two pieces of coolant hose.

If you have problems with erratic idle afterwards. You will need to find your fast idle (or idle air control valve), and disable it by blocking it off or somehow keeping it closed. This occurs mostly in Hondas to my knowledge, and it's pretty hard to explain in a "universal" manor.

Want more low-buck modifications like these? Check out The Definitive Guide to Low-Buck Performance



Gain 5 Horsepower This Weekend, Free Mods for your Honda Prelude, Cheap Horsepower
2004-2006 by Mad Science Industries. All Rights Reserved. Duplication Requires Authors Permision
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Last edited by 98BB6SH; 09-27-2008 at 12:07 PM.
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Old 09-27-2008, 03:36 AM
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Re: Free/Cheap Mods - Gain 5HP Over The Weekend

already done all those except for the intake air temp one (don't think i have one) and insulateing the fuel lines... other than that, i always index the plugs, use mobil 1 full synthetic, have bypassed the TB coolent lines and have made a block off plate for the FIV, and as for the coolent i run 100% water with water wetter, i just make sure to flush the system out once a month to prevent corrosion
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Old 09-27-2008, 11:00 AM
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Re: Free/Cheap Mods - Gain 5HP Over The Weekend

distilled water and water wetter ftw~!

nice post man.
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Old 09-27-2008, 12:04 PM
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Re: Free/Cheap Mods - Gain 5HP Over The Weekend

good **** should be stickied
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Old 09-27-2008, 12:05 PM
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Re: Free/Cheap Mods - Gain 5HP Over The Weekend

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Originally Posted by Qnz92Lude View Post
good **** should be stickied
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Originally Posted by ogsmakdade View Post
distilled water and water wetter ftw~!

nice post man.
thanks guys. a little googlin at 4am pays off every now and than.

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Old 09-27-2008, 02:26 PM
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Re: Free/Cheap Mods - Gain 5HP Over The Weekend

Nice find & verrrry interesting, actually makes a lot of sense
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Old 09-28-2008, 06:40 PM
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Re: Free/Cheap Mods - Gain 5HP Over The Weekend

That sounds really cool and interesting. My only question is what is the purpose for coolant running through the throttle body?
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Old 08-10-2011, 10:13 AM
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Re: Free/Cheap Mods - Gain 5HP Over The Weekend

The only reason I know that the coolant runs through the TB is to keep the butterfly valve from sticking in colder weather. The coolant keeps it warm and thus moving freely.....
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Old 08-10-2011, 11:58 AM
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Re: Free/Cheap Mods - Gain 5HP Over The Weekend

The tb bypass only gives power for a few seconds? How long can you run distilled water and wetter?
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