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The Hondata S300 is one of the most advanced OBD1 Honda tuning systems available on the market. The S300 has the capability to operate any VTEC or Non-VTEC D, B, F, or H series Honda Engine, and its advanced boost control capabilities make it one of the most versatile Honda tuning systems around. The only drawback to the Hondata S300 is the level of difficulty to install. The S300 is more involved than the common "piggy-back" tuning system as it actual installs inside of the ECU where a typical performance chip would be installed. Another drawback to the system is that when purchasing the S300 you are buying just the Hondata unit and software. It is up to you to arrange to have it installed. However, with this step by step tutorial, you can now successfully install your Hondata S300 into your OBD1 ECU yourself!

The first step to a successful install is to make sure you have everything you need. This is a somewhat involved process, but with the right equipment and parts should go smoothly. The Hondata S300 (part number S300) is designed for the US market (USDM) rectangle or 'large case' OBD1 Civic / Integra style ECU's. Hondata part number S300J is designed for the JDM (Japan market) square case OBD1 Civic / Integra style ECU's. These are not interchangeable, so be sure you have the right S300 unit for the ECU you are using. This install guide applies to the USDM variant only. The accepted Honda ECU's to use with the S300 are: P06, PR4, P28, P30, P61, P72, and P75. It is assumed that any non-vtec ECU will only be used in non-vtec applications. If you are going to be using a P06, Pr4, or P75 ECU, you must also perform a non-vtec to vtec ECU conversion with the Hondata S300 installation to properly operate a VTEC engine.

Let's get started. Unscrew both top and bottom lids from your ECU and set both covers aside. On the side of the ECU where the wire harness plugs are you will see a small phillips head screw. Completely remove this screw and the small metal retainer that it holds on the inside of the ECU case and set these aside. Turn your computer upside down and remove all of the screws that hold the circuit board to the ECU case and take note how these are slightly different from the screws for the ECU covers. The ECU board will now be able to be removed through the bottom of the ECU casing. Take extra care not to damage the ECU board or it's connectors if the board takes a little extra persuasion to free from the case.

Now that the board is removed we can begin with the fun part. Using a desoldering tool or desoldering braid, desolder the 28 solder joints marked 27c256, the 24 joints marked 74hc373, and the four holes on the space labeled CN2. You will notice the CN2 section on the board has 5 holes. You can leave the solder joint that is furthest from the ECU connectors filled as it will not be used. On most boards there will be two solder joints labeled R54. These will require desoldering as well. If your ECU does not have the area labeled R54 directly above the 28 hole area marked 27C256, then simply disreguard this step. Clean all areas of the ECU that you desoldered with flux to ensure no loose solder is left on the board or in the way of your desoldered holes. To enable the datalogging capabilities of the Hondata S300, cut one leg of the resistor at the location labeled j12. For a cleaner appearance you may completely desolder and remove the resistor if you wish.

Now on to the installation. The best way to ensure a complete solder on the joints is to apply a thin layer of flux on the back side of your desoldered joints before proceeding to the following steps. Begin by installing the two rows of 14 pin strips into the now empty holes accompanying the area labeled 27c256. Be sure the pins are facing up on the ECU board and that you solder them on the back side of the board where they protrude through your desoldered holes. Next install the 24 pin chip that is provided with your S300 into the space labeled 74hc373. Make sure the half moon notch on the chip faces toward the ECU plugs and then solder into place. Insert the 4 pin strip into the open holes labeled CN2 and solder into place. There should be one hole at CN2 left without anything in it furthest away from the ECU plugs from the earlier step. If your ECU has a space labeled R54, solder the provided resistor into place. Polarity doesn't matter. It can be installed in either direction. Next, press the Hondata S300 circuit board firmly into place on the two rows of 14 pins at 27c256 and four pins at CN2. Take extreme care not to bend or break any pins. Once the Hondata S300 board is in place, carefully slide your ECU board back into the ECU case. Mark on the ECU casing the area that is blocking the S300 USB plug. Carefully remove the ECU board from the casing once again, and using a grinder or hack saw, cut out the marked area to allow your USB cable to plug into the S300 USB port.

Thoroughly clean the ECU casing and circuit board with a quality electrical parts cleaner of any debris or remaining solder flux. Reinstall the ECU board into the casing being careful not to damage any components. Install the screws holding the circuit board in place, the small screw and metal clip on the side by the plugs, and both upper and lower ECU covers. Be sure to carefully affix your new fancy Hondata sticker to your ECU for proper operation.

With the correct parts and patience, the Hondata S300 system can be installed successfully. However, if you are weary of any of the mentioned steps, or doubt your soldering skills, you should pass this job on to one of these professionals to complete a Hondata S300 Installation. Many times the small price paid to have the S300 professionally installed can far outweigh the risk of damaging your computer or your new Hondata unit. Happy tuning!

Aromatherapy Bath Recipes - An Easy Guide To A Blissful Bath

Initially though the world of aromatherapy may appear to be dizzying, yet it is very simple to master the formulation of your own aromatherapy bath recipes. All you need is a basic knowledge of how to go about mixing the ingredients, and of course, an idea of what scent creates what effect on your body systems. And with a little bit of experimentation, you will soon be able to cure most of those body aches, migraines, even PMS related symptoms with the help of just a long, soaking, scented luxury bath!

Aromatherapy For Beginners:

Aromatherapy is made up of certain plant-derivates, called essential oils. Each oil has a particular scent associated with it, which, when absorbed in our body through inhalation, bath or massage, evoke certain responses from our body mechanisms. They may act as a relaxant or a mood lifter. They may induce a sensuous effect or put you to sleep! If you are a totally new entrant in this field, you need to know some basic "Do"s and "Don't"s related with aromatherapy bath recipes.

- First, always use a clean glass, porcelain or aluminum bottle for mixing the essential oils. Never use plastic as the oils react to plastic.

- Second, the essential oils are highly concentrated, so you need to use very little of those oils diluted with some base oil, known as carrier oil, like sweet almond, jojoba, olive or coconut.

- Direct contact of the essential oils can cause skin irritation.

- All the essential oils are not suitable for children. So you must double check the ingredients before using one of the aromatherapy bath recipes on kids.

- These oils are highly volatile and sensitive to ultra-violet radiations. So they should be kept in tightly closed containers, in cool, dark place.

Aromatherapy In Bath:

Now that you have got the basics in place, let's start on creating your own first aromatherapy bath recipes!

- A simple rule to follow is: mix 15-30 drops of essential oils in one ounce of the carrier oil. If you are using more than one essential oil, you still need to stick to that total.

- A Vitamin E based carrier oil, although a bit expensive, can help retain the aromas lingering on the surface of the water for longer, before the smells evaporate.

- Add 1-2 teaspoon of the blended recipe to your bath water, just before you step into the bath.

Some Useful Aromatherapy Bath Recipes:

- Mix 7 drops of Neroli with a tablespoon of the base oil or 3 tablespoons of honey, to give yourself a warm luxurious bath during those pregnancy blues. Neroli, though expensive, is a great anti-depressant.

- If you need a disinfecting bath, try using tea tree combined with orange or lemon. Use very little of the citrus oil, as it can be harsh on the skin.

- Try using 2-3 drops of peppermint in 1 teaspoon carrier oil on those draining summer days. Peppermint is an excellent stimulant, good for headaches, nausea, achy joints and indigestion. But it must be avoided during pregnancy or when using homeopathy medicines.

These are just a few of the innumerable recipes you can make by mixing and matching various different scents. Once you start exploring the world of aromatherapy, you will soon find that there is a whole new universe waiting for you out there. So just start experimenting with your aromatherapy bath recipes!

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