Antons Race Electrics
RaceSmart - Jetting Made Simple
RaceSmart is a simple to use software program that reads the current weather information and based on your motor, fuel system specifications and a mathematical equations displays the suggested Jet to use.
When the weather changes so does the power that your motor is able to deliver. To optimize the performance of your engine you need to change the engines fuel mixture through the jetting to match the atmospheric conditions - if you don't you are restricting valuable horsepower and could even cause engine damage. Click here to learn more about Air Density
The RaceSmart software takes away the complications or dangerous guess work and conveniently suggests the correct Jet size to use. Included in the RaceSmart package is a very accurate Weather Station that fully automates the Jetting calculation process.
The RaceSmart software also comes with easy to use software, allowing even computer novices complete the process that will provide you with the correct jet size.
RaceSmart also conducts weather and session logging. Here the weather is automatically recorded and a simple system makes it easy to recall the data from any given time the system has been on.
RaceSmart can also record your sessions, jets used, race results and more. With a complete log, find out what you were doing and how well it worked. Quickly look up the results in the log viewer or have them automatically show up in Microsoft Excel(tm) and conduct your own analysis.
The RaceSmart system has proven itself by finding early signs of engine and fuel system problems. A client had to richen their fuel system more than the air density indicated. They swapped motors and when pulled down the first one found an air leak.
After you use it, you will think like the rest - why didn't I have this before!
Motor and Fuel Systems supported:
· Carburetor - Holly Jetting types, most carburetors fit in this category
· Mechanical Injection - popular for circle and drag racing systems. Note what we call a Jet some of you guys know it as a Pill
· Rotax Max 125 - Customized for easy setup for Rotax users
· 2-Stroke slide carburetors with Jet and a needle position
· Electronic Fuel Injection - set the optimum Air/Fuel ratios in your maps
· If you have another system that is not covered, contact us and we will see how we can help you
Computer System Requirements:
· Windows 98, NT, 2000 or XP
· CD-ROM recommended but not necessary (contact ARE if you need floppy install)
· Serial Port, if your computer does not have a serial adapter (plug with 9 pins) a USB to Serial converter can be used (contact ARE if you need one)
· Many people take an older style (inexpensive) laptop computer to the track. Any older system running Windows 98 or above can usually be found for less than $500. See the following websites for more details and well priced laptops, Laptop World or PC Surplus.
CB Squared Weather Station Black Box
To automate the Jetting and Logging process ARE can provide a very small, accurate and inexpensive weather station that connects directly to your computer that is supplied by CB Squared.
Unlike cheap and inexpensive weather stations, the CB Squared black box provides the quality needed to obtain accurate readings suitable for tuning performance engines.
To get an accurate reading from any Weather Instrument location is important. Try to locate the instrument in a well ventilated area and out off direct sun light or anything else that could affect temperature, pressure or humidity. Try to use a similar location every time. Finding a good location just needs a little thought.
The Weather Station Black Box is powered by a 9 volt battery - remember to bring a spare battery to the track with you. A wall adapter is also available, contact us for more details.
Note: The weather station is not weather proof - the sensitive sensors need to be exposed to the atmospheric elements and can mot be sealed properly. Please take care to keep your instrument out of the rain or any other extreme conditions.
There are also custom applications available for some Engine and Wheel Dynameters, contact us for more details.
Black Box specifications:
Size: 11.5 x 6.4 x 2.5 cm (4.5 x 2.5 x 1 inches)
Temperature: National LM34DZ , 0°C to 100°C, 1°C accuracy
Barometric Pressure: Fujikura XFAM-115KPASR, 0 to 16 PSIA, ±2% accuracy
Humidity: Honeywell HIH-3610, -40°C to 85°C, 0% to 99% ±2% accuracy
Power: 9 Volts, standard 9 volt alkaline or wall adapter
The Importance of Air Density
Maximizing your motors power is not just about putting in more fuel. To burn the fuel efficiently (most power) you need oxygen which is in air (21%). If you put in too much fuel there is not enough oxygen to burn it (which will be less power as the air is displaced by the fuel).
So the key to maximizing power of an engine - is getting more AIR into it! Turbo and super chargers put more air into the system and you can see how much more power those motors make. Once you get the AIR into your motor - than get the Air to Fuel ratio correct, that is how to maximize the power for any combustion motor.
Simple yes - but here is the problem, air changes with temperature, barometric pressure and humidity - this is called AIR Density. Density is simply mass/volume, for example water is denser than oil, so water 'sinks' below the oil. Another example is hot air is less dense than cold air making a hot air balloon rise/fly.
Hot air makes a balloon expand and rise - again this is because the air in the balloon is less dense than the outside the balloon. Putting hotter air into your motor means that the air is less dense (expands the balloon) which means less oxygen is available to burn your fuel, which means less fuel is needed, which means less power is available! This is the why turbo motors us an intercooler, cool the air to increase air density.
So Air Density does have a large effect on the power that a motor can produce - this is what the correction factor is compensating on an engine or chassis Dynamometer.
Getting the Air/Fuel ratio correct for the given air density is going to give you the most power. This is tuning the engine, but soon as the air density changes - so does the amount of fuel required, you have to stay on top of this to continue to get maximum power from your motor. The best way to determine the correct Air/Fuel ratio is by using a wide band LAMBDA meter.
Determining Air Density is easy with instruments, impossible without. What defines Air Density is Temperature, Barometric pressure and Humidity. Most people easily understand temperature but what is barometric pressure? Measured with a Barometer it is the pressure of the air - go up 1000 meters the pressure goes down (less pressure), have a storm pass by usually the pressure will go down, good weather usually the barometer goes up. Determining barometric pressure is virtually impossible without an instrument. Humidity changes our air density proportional to the air temperature, of the three factors humidity effects are the smallest but still important.
There is only one other atmospheric condition that can affect our engine power output, that is pollution. You need quite a bit of pollution to offset the oxygen level in air so unless you are in a non-vented dyno room this will have an affect but still not as much as temperature, pressure and humidity.
Air Density also affects: power output of a motor, float levels in a carburetor, down force generated and aerodynamic drag - and race car engineers take all these factors into consideration to make the optimum car setup
Installation Guide Documents for...
Antons Race Electrics Wiring Tips
How old is your wiring and wiring harness?
If it looks bad, it probably is!
When was the last time you inspected your harness?
If the engine is the heartbeat of your car, then the wiring is the nerves and veins of the vehicle, carrying all the instructions from driver to machine.
Wiring is a lifed component and should be replaced as part of your maintenance schedule How often do you hear or experience that electrical gremlin on race day. One simple wiring issue can end your race. When servicing your wiring make sure the harness is secured every 8-12 inches along the chassis. Where wiring terminates to switches make sure that the harness is secured as close to the point of termination as possible (this will stop the harness moving up/down and help to stop it breaking at point of termination).
Keep soldering to a minimum only solder wires that are carrying high current (soldering can cause wicking the wire becomes brittle and will break at point where the solder meets unsoldered wire).
Crimping is the preferred method for wire termination. It is essential that a quality crimp tool is used, and that the correct tool is used for the type of terminal being crimped. Once you have crimped the wires together pull on the two sides firmly to make sure it is secure, if it is not then re-crimp.
Heat-shrink should also be used for strain relief on the ends of harnesses. Where a terminal has been crimped, this will provide support for the wire to help eliminate failure at this point.
To fuse or not to fuse?
Fitting fuses or circuit breakers are essential to avoid a wiring harness being damaged due to a short, or worse a fire being started.
Question - Is it true that fusing circuits often causes electrical failures?
Answer Fuses or breakers if fitted at the correct rating only blow or trip if there is a problem e.g. a short to ground or a component failure.
When fusing your circuits non-essential items may be ganged off the one circuit. But critical circuits (ignition coil supply, cooling fan ECU/ injectors fuel pump) should have their own fuse or breaker so that there is no chance that a companion circuit is causing the fuse to blow or the breaker to trip. If set up this way then the fault is only on the circuit that the fuse/breaker is covering and therefore will not cause you any problems
To recap quickly:
· Make sure harness is secure
· Keep soldering to a minimum
· Ensure that when crimping wires they are secure
· Heat-shrink for strain relief
· Employ circuit protection that is correctly rated
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