Dirt Track Racing Forum, Race Car Setup Calculators and Technical Data for Circle Track Racing

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GitDirt offers many setup tools and technical data to help racers be faster. Dirt track racing is a very competitive sport and every racer needs a edge.
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	Share | Free Screensavers Dirt Track Forum Racing Links Members Photos Videos Metric Secrets Setup Secrets Save Energy Tracks Weather Circle Track Magazine Delivered to Your Door $1.25 a Issue!		Dirt Track Racing Setup Calculators Easy to use calculators to help determine setup changes needed to improve your cars performance. Choose from the list below and enter the needed information in the text boxes. Hit calculate to get the results. No math skills required! Air Filter Height K&N air filters when tested generally demonstrate a cumulative filtration efficiency of between 96% and 99%. Use this tool to determine the size air filter required to match your engine. Piston Speed Longer Rods slow down piston speed. Longer rods will let the engine breathe a couple hundred RPM higher. The rings will last a little longer too from less cylinder wall pressure. Keith Black offers pistons to use with longer rods. Average Speed Calculate average speed from lap distance and lap times. Ring and Pinion Ratio The Ring and Pinion ratio is determined by dividing the number of teeth on the ring gear by the number of teeth on the pinion gear. Carburator CFM Volumetric efficiency is how well an engine breathes. Head work,intake runner size, valve size and camshaft lift improve flow. Street Stock engines use .80, full race engines use .90 for baseline. Rocker Arm Ratio You can increase valve lift by changing rocker arm ratio to gain horsepower with your engine. Final Drive Ratio Final Drive Ratio is the number of revolutions the wheels turn per revolution of the engine. If your race car lugs coming off the corner, a larger final drive will improve corner exit speed. RPM to MPH Use your tachometer, tire diameter and final drive ratio to determine your miles per hour. Gasoline Weight Find out how much your gasoline weighs. Easy to us, enter gallons and calculate its weight with one click. Use this calculator to help you determine how much weight is changed as fuel is used. Methanol Weight Find out how much your methanol weighs. Easy to us, enter gallons and calculate its weight with one click. Water Weight Find out how much water weighs. Easy to us, enter gallons and calculate its weight with one click. 50/50 Coolant Weight Find out how much your coolant weighs. Easy to us, enter gallons and calculate its weight with one click. Click the images below to view larger.
			Technical Data
			Decimal Equivalents	GM Powerglide Ratios
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			GM Block Casting Numbers	GM 4 Speed Ratios
			GM Intake Casting Numbers	How to Scale your Race Car
			Gapless Ring Gap (Total Seal)	Race Car Setup Sheets
			SBC Torque Specs	Trigonometric Tables
			GM Head Torque Order
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