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1/4 Mile Speed Calculator
Source: by Fast wheels at members.tripod.com

1/4 Mile Time Calculator
Source: by Fast wheels at members.tripod.com

Actual Speed vs. Speedomter/PSOM Reading w/tire size change
Source: by intercotire.com

Aero Drag  HP Loss
Source: by GTech gtechprosupport.com

Aerodynamic & Rolling Horsepower
Source: by bgsoflex.com

Air Requirements in CFM Calculator
Source: by raceabilene.com

Alternator Sizing (for audio amps, OEM electrical accessories, etc.)
Source: by HO� highoutputalternator.com

Battery ColdCranking Amp Estimation
Source: by bgsoflex.com

Bore & Stroke (gasket thickness, deck height, valve pocket, head ccs & # of cylinders to compression ratio & displacement
Source: by Ross Racing Pistons rosspistons.com

Brake Master Cylinder Lever Ratio
Source: by markwilliams.com

Brake Pedal Ratio
Source: by markwilliams.com

Calculators & Tables
Source: by intercotire.com

CFM Calculator
Source: by Pony Carburetors, Inc. ponycarburetors.com

Coil spring rate
Source: by proshocks.com

Coil Spring Rate
Source: by foa.com

Coil Spring Rate Calculator
Source: by blueovaltrucks.com

Compression Ratio, piston head volume/compr. height, ring end gap, deck clearance/displacement
Source: by kbsilvolite.com

Compression Ratio
Source: by FederalMogul

Compression Ratio (head volume in CC, piston top volume, cylinder bore, crankshaft stroke, deck height & gasket height)
Source: by Bowling & Grippo bgsoflex.com

Compression Ratio HP Change Calculation
Source: by Bowling & Grippo bgsoflex.com

Compression RatioDisplacement Calculator
Source: by raceabilene.com

Crawl Ratio
Source: by therangerstation.com

Crawl Ratio
Source: by Pit Bull Tire Company� pitbulltires.com

Crawl Ratio Calculator; by Transmission Low Gear Ratio, Transfer Case Low Gear Ratio & Axle Gear Ratio
Source: by blueovaltrucks.com

Crosswind, Highway
Source: by csgnetwork.com

Cubic Inches to Liters (click Site Map, Chad's Tips, Previous Tips)
Source: by autokrafters.com

Cylinder Head Flow Correction
Source: by Dan B at Bowling & Grippo bgsoflex.com

Deck Clearance; compute the deck clearance for above or below deck applications
Source: by kbsilvolite.com

Differential Gear Computation, Best (top speed MPH, tire diameter, RPM @ peak HP)
Source: by Bowling & Grippo bgsoflex.com

Differential Gear Ratio (RPM, tire diameter, target MPH)
Source: by currieenterprises.com

Differential Gear Ratio Calculator (RPM, tire size and desired MPH)
Source: by currieenterprises.com

Distance, Temperature, volume, time, speed, mass, power, density, pressure, energy, etc.
Source: by joshmadison.com

Distances between Longitude & Latitude Points
Source: by csgnetwork.com

Drive Shaft Velocity Calculation
Source: by bgsoflex.com

Engine Displacement by bore, diameter, # of cylinders
Source: by FederalMogul

Engine Displacement Calculator
Source: by bgsoflex.com

Engine Horsepower Calculation
Source: by bgsoflex.com

Engine Related Formulae; Static Compression Ratio, CFM, HP & Torque, BHP, Cylinder volume (displacement), Piston speed (ft. per mm.), Valve Spring Rate, Rod Ratio, Starting Ratio, Carburetor Size formula, Center of Gravity, Transmission's Gear Ratio, Drill sizes for Tapping Threads, etc.
Source: by truckpulls.com via web.archive.org

Engine Size & Compression
Source: by Mike C at Procrastination Racing

Estimated Quarter ET from Rear Wheel HP & Weight
Source: by raceabilene.com

Estimated Quarter Mile Speed from Rear Wheel HP & Weight
Source: by raceabilene.com

ET & MPH Environmental Correction; correct quartermile Elapsed Time (ET) and MilesperHour (MPH) to Standard Conditions
Source: by Bowling & Grippo bgsoflex.com

Exhaust Header Length Computation
Source: by bgsoflex.com

Fraction to Decimal
Source: by FederalMogul

Fuel Injector Sizing Program, General
Source: by Bowling & Grippo bgsoflex.com

Fuse Size
Source: by HO� highoutputalternator.com

Gear Ratio (new tire diameter & gear ratio)
Source: by Reider Racing Ent., Inc.

Gear Ratio (new tire diameter & gear ratio)
Source: by Pit Bull Tire Company� pitbulltires.com

Gear Ratio (ring & pinion teeth count)
Source: by therangerstation.com

Gear Ratio (ring & pinion teeth count)
Source: by currieenterprises.com

Gear Ratio (ring & pinion teeth count)
Source: by jawsgear.com

Gear Ratio (RPM, tire diameter, target MPH)
Source: by currieenterprises.com

Gear Ratio Change From Tire Change
Source: by therangerstation.com

Gear Ratio Change From Tire Change; ".by New Tire Diameter: Old Tire Diameter: Current Gear Ratio; This calculator will take your gear ratio and tire sizes and tell you what the effective or Actual Ratio is. It will then suggest a New Ratio along with a Hi and Low alternative. This New Ratio will return the vehicle to it's original performance after the addition of larger tires. Obviously, you will have to round the new ratio to the closest available ratio..."
Source: by blueovaltrucks.com

Gear Ratio Determination; "...remove the differential cover or the 3rd member and count the number of teeth on the gears. Unfortunately, this can get messy. One somewhat easy yet very reliable way is to jack up the wheels, disconnect the driveshaft, rotate one wheel, and count how many revolutions the pinion yoke/flange makes.
If you turn one tire & the other one either stays still while the pinion rotates, or the other one rotates backward while the pinion stays still, or something in between, then you've got an open diff or a very weak LSD (like a TracLok with too many miles on it). In this case, you need to secure one wheel (perhaps by lowering the tire onto the ground), then you can figure your gear ratio by rotating the airborne tire TWO full rotations and counting the number of times the pinion rotates. 3.73 turns means 3.73 gears. If you only rotate the tire once, then 1.865 turns means 3.73 gears. If you turn one tire & the other one turns the same number of turns in the same direction, then you've got a good LSD or locker. In this case, you can just rotate the tires ONE full rotation and figure your gear ratio by counting the number of times your pinion rotates. 3.73 turns means 3.73 gears..." Read More
Source: by ObiWan at jedi.com

Gear Ratio Guide for Larger Tires; Scroll Down or Click, Another RPM/Gear Ratio/Tire chart if site reverts to main page; MIESK5 NOTE, Rough Country� removed this same chart from their site in FEB 2011 & company rep said it isn't there anymore.
Source: by Rough Country� via broncocity.com

Gear Ratio Optimum Shift RPM (4 speed manual)
Source: by Drag Performance richmondgear.com

Gear Ratio; Enter the number of teeth on your ring and pinion gear set to find the gear ratio. Example: Ring Gear / Pinion Gear = Ratio
Source: by differentials.com

Gear Ratios & And here is a chart of rpms for gear ratios with a few different tire sizes tire at 60 miles per hour
Source: by Carl J at jantzengineering.com

Gear Ratios, (RPM, speedometer, etc., scroll to bottom)
Source: by Mark M at wt4x4.net

GPS Data Conversion Tools
Source: by Lars at BB.BC4x4.com

Header Length Computation Program
Source: by bgsoflex.com

Highway Dyno
Source: by bgsoflex.com

Highway Dyno
Source: by Bowling & Grippo bgsoflex.com

Holley Carburetor Jet Program
Source: by Bowling & Grippo bgsoflex.com

Horsepower and Torque
Source: by FederalMogul

HP to Quarter Mile
Source: by musclecarclub.com

HP, simple
Source: by dsm.org

Ignition Circuit Simulation
Source: by bgsoflex.com

Impedance, for Dual Voice Coil Subs
Source: by HO� highoutputalternator.com

Impedance, for Single Voice Coil Subs
Source: by HO� highoutputalternator.com

Inch  MM
Source: by mdmetric.com

Inch to MM
Source: by industrialenclosures.com

Intake Runner Length Prediction
Source: by bgsoflex.com

Intake Runner Length Prediction
Source: by Bowling & Grippo bgsoflex.com

International Time Zone Converter
Source: by csgnetwork.com

Leaf Spring Calculator
Source: by blueovaltrucks.com

Light Truck Tire
Source: by csgnetwork.com

Machinist's Calculator (right angle triangles)
Source: by machinistcalculator.com

Metal Weight
Source: by Metal Suppliers Online suppliersonline.com

Metric Conversion Table
Source: by Bresco

Metric Tire Conversion
Source: by therangerstation.com

Metric Tire Conversion
Source: by Rough Country� roughcountry.com via web.archive.org

Metric Tire Conversion
Source: by Pit Bull Tire Company� pitbulltires.com

Metric Tire Conversion
Source: by Red Rock 4x4

Metric Tire Conversion
Source: by Jeff B at rmftc.com

Metric Tire Conversion
Source: by blueovaltrucks.com

Metric Tire Conversion
Source: by therangerstation.com

Miles Per Hour (MPH) (tire diameter change)
Source: by currieenterprises.com

Miles Per Hour (MPH) (tire diameter, RPMs, axle ratio); Enter the maximum potential safe engine RPM. Enter the tire size diameter and the target vehicle speed in MPH. Click on Calculate Differential Gear Ratio. The value will be returned in estimated differential gear ratio, based on the entered values. To do another, click the Clear Values button and then enter a new set of values. Calculated accuracy of current Javascript enabled browsers is generally 16 places
Source: by currieenterprises.com

Miles Per Hour (MPH) (tire diameter, RPMs, axle ratio, transmission & transfer case ratios)
Source: by Pit Bull Tire Company� pitbulltires.com

MilesPerGallon (MPG) by coefficient of drag, frontal area, tire pressure, brakespecific fuel consumption, and speed
Source: by Bowling & Grippo bgsoflex.com

MilesPerGallon (MPG) by Miles Driven & Gallons Bought
Source: by 4wheeldrive.about.com

MilesPerGallon (MPG) by Miles Driven & Gallons Bought
Source: by therangerstation.com

MilesPerGallon (MPG) Calculator; "...This calculator will compute your truck's Miles Per Gallon and forecast your gasoline expense for one month and for one year. It also allows you to see how much money you would save if you were driving a truck that got better gas mileage. Only fill in the blocks to the left of the red line. Do not enter anything in the black boxes. The results will be shown in the black blocks to the right..."
Source: by blueovaltrucks.com

Mimimum Cable Size to Use (AWG) Table
Source: motorcityreman.com

MM to Inch
Source: by industrialenclosures.com

Online Conversion  convert just about anything to anything else in Windows�
Source: by OnlineConversion.com

Online; Using PC, PDA, WAP & Cell Phone
Source: by calculator.com

Optimum Quarter ET from Quarter Mile Top Speed Calculator
Source: by raceabilene.com

Piston Compression Height; get the approximate piston compression height.
Source: by kbsilvolite.com

Piston; will give you the proper piston head volume with a known compression ratio
Source: by kbsilvolite.com

Ramp Travel Index (RTI) Calculator
Source: by therangerstation.com

ReGearing, Bronco; "...equations for determining what gear ratio you may want .."
Source: by Jer C (Godless, Beerman, SOLD) at FSB

Rear End Ratio (RPM, MPH, tire diameter)
Source: by markwilliams.com

Rear End, overall width, (click in left panel)
Source: by Nine Plus new9inch.com

Revolutions Per Minute (RPM) (axle, transmission & transfer case ratios, tire diameter
Source: by currieenterprises.com

Ring and Pinion Calculator; Calculate Ratio By Counting Teeth
Source: by blueovaltrucks.com

Ring End Gap; you can obtain the proper ring end gap requirements for KB Pistons using end gap factors from inside the front cover of the KB catalog or on this web site
Source: by kbsilvolite.com

Ring End Gap; you can obtain the proper ring end gap requirements for KB Pistons using end gap factors from inside the front cover of the KB catalog or on this web site
Source: by kbsilvolite.com

Road Mapping scale
Source: by csgnetwork.com

RPM (axle ratio, MPH, tire diameter)
Source: by precisiongear.com

RPM (axle ratio, MPH, tire diameter)
Source: by jawsgear.com

RPM (axle ratio, transmission & transfer case, tire diameter)
Source: by Pit Bull Tire Company� pitbulltires.com

RPM at a given MPH, or MPH at a given RPM, tire diameter, final (differential) gear ratio, and transmission ratio
Source: by Bowling &; Grippo bgsoflex.com

RPM Calculator (RPM/MPH); by axle ratio, transmission & transfer case type, tire diameter); Punch in da info; see graph; then click Unclutter
Source: by balsa.no

RPM, Street Performance (rear end ratio, tire diameter, desired MPH, etc.)
Source: by richmondgear.com

RPM; Use the RPM calculator to determine what RPM your engine will run based on gear ratio, tire diameter, transmission and MPH. You can try various combinations to come up with an appropriate combination of ring and pinion gear ratio and tire diameter for your vehicle. The RPM calculator should be used as a guideline for comparative purposes only. Your vehicle will probably run at different RPM�s than those you calculate. See What gear ratio do I need in FAQ for a discussion on choosing a ratio.
Source: by differentials.com

Scientific (area, cosine, tangent, square root, sines, quadratic equation)
Source: by westechperformance.com

Scientific w/extended capabilities for Windows�
Source: by binarythings.com

Shift Point, Optimum
Source: by Bowling & Grippo bgsoflex.com

Specialist Calculators, shapes, general arithmetic, Cost of Living Index in var. countries, etc.
Source: by Cleave Books cleavebooks.co.uk

Speedometer & PSOM Driven Gear Calculator, Ford
Source: by Jim R at home.mchsi.com

Speedometer Calculator, by Tire Diameter
Source: by Pit Bull Tire Company� pitbulltires.com

Speedometer Calculator, by Tire Diameter
Source: by currieenterprises.com

Speedometer Calculator, by Tire Diameter
Source: by The Ranger Station� therangerstation.com

Speedometer Calculator, by Tire Diameter
Source: by blueovaltrucks.com

Speedometer Calculator, Changed Ring Gear and Pinion Ratio; "...This calculator requires the use of Javascript enabled and capable browsers. This calculator is designed to determine the difference between the indicated speedometer speed and the actual speed after a change of gear ratio on the ring gear and pinion. This assumes no other changes such as tire or wheel size, engine changes or transmission changes. Enter the ratio of the original ring gear and pinion (changed from) and the new ring gear and pinion (changed to). Enter the indicated speed as read on the speedometer. Click on the Calculate button. At any given speedometer indicated speed, the true speed is the ratio difference multiplied by the speedometer indicated speed. Depending on the vehicle manufacturer and the transmission type and manufacturer, there are speedometer gears available to correct the indicated speed. Check with your manufacturer's parts supplier."
Source: by blueovaltrucks.com

Speedometer Calibration Program (drive or driven gear, gear ratio, rear tire diameter, speedometer revolutions)
Source: by Bowling & Grippo bgsoflex.com

Speedometer Gear Change Calculator w/Ford Part Numbers, Colors, & Tooth Count
Source: by Chris B (Blue, bronco boy) at 3.bc.sympatico.ca

Spring, Coil Rate
Source: by therangerstation.com

Spring, Leaf
Source: by therangerstation.com

Springs  weight & percentage
Source: by proshocks.com

Temperatures  F to C; measurements  dec. to metric
Source: by heatshieldproducts.com

The Calculator Home Page
Source: by dml via dakotatruck.net

Tire Change, gear ratio, mph, ring & pinion
Source: by intercotire.com

Tire Diameter Calculator; "...You need to know your actual tire diameter in order to work with the RPM calculator relevant to gear ratio. Tire specifications usually follow a three number format, such as 275/75R16, where 275 is the WIDTH of the tire tread in millimeters, 75 is the ASPECT (or percentage of tread width to yield the sidewall height), and 16 is the WHEEL diameter. Using the numbers in this example, you�fll get a tire height of 32.24��. The calculated value should be used only as a guideline for RPM calculations. Quite often, if you measure your tire diameter from the ground to the top of the tire, it measures less than the calculated value. It may �ground up�h closer to the calculated value while in motion. Tires with identical specifications that are made by different manufacturers may also have different actual diameters. Truck and off road tires may have a specification like 30�~9.5R15, where 30 is the tire diameter, 9.50 is the tread width and 15 is the wheel diameter. You don�ft need the tire diameter calculator in this case..."
Source: by differentials.com

Tire Height Calculator (based on width, aspect & size)
Source: by jawsgear.com

Used Tire Calculator: Use this chart to accurately calculate the price for selling or buying used tires
Source: by performanceunlimited.com

Voltage Drop in a Power Cable, Audio
Source: by HO� highoutputalternator.com

Volume, Lengths, weights, etc.
Source: by bobistheoilguy.com

Volume, Weight, pressure, temp., time, speed, energy, power
Source: by arizonadrivelines.com

Wheel & Tire Motion
Source: by csgnetwork.com
