Calculated-industries 8703 Manuel d'utilisateur

HOT ROD CALC™ — 1

8 — HOT ROD CALC™ Drag Coefficient – Enters the vehicle’s drag coefficient when correcting for wind. See Appendix A for typical body styles and assoc

HOT ROD CALC™ — 9 Piston Speed – Enter or calculate an engine’s Piston Speed. Calculate Piston Speed given values for RPM and Stroke length.  Mech

10 — HOT ROD CALC™ Deck Height – Enter and store cylinder Deck Height. Used in calculating Compression Ratio. Torque – Enter or calculate flywheel

HOT ROD CALC™ — 11 PREFERENCE SETTINGSPress , then  to access the Preferences menu. Continue pressing  to toggle through different Preferences. Pre

12 — HOT ROD CALC™ ENTERING DIMENSIONSDistance/Length DimensionsExamples of how linear dimensions are entered (press  after each entry):DIMENSIONS

HOT ROD CALC™ — 13 ENTERING CONVERSIONSDistance/Length ConversionsEnter and convert 1,320 feet to meters.KEYSTROKES DISPLAY 0. 1320 F

14 — HOT ROD CALC™Engine Displacement ConversionsEnter and convert 450 cubic inches (CID) to liters.KEYSTROKES DISPLAY 0.450 CU IN LITE

HOT ROD CALC™ — 15Weight ConversionsEnter and convert 2700 pounds to kilograms.KEYSTROKES DISPLAY 0. LBS 2700 KG 1224.6994Volume Conver

16 — HOT ROD CALC™ USING THE HOT ROD CALCNote: The Hot Rod Calc’s built-in horsepower correction calculations are based on formulas designed for natur

HOT ROD CALC™ — 17slower it will go. More specifically, engine performance is impacted by the ambient air’s density. MSA includes three parameters: ab

HOT ROD CALC™ — 1Designing and building the Hot Rod Calc™ could not have been done without the support and input from individuals knowledgeable in all

18 — HOT ROD CALC™current, local measured weather conditions entered into the calculator. Once you have established an air/fuel ratio for the current

HOT ROD CALC™ — 19Pressure There are two types of commonly referenced pressure, Absolute Pressure and Corrected Pressure. Absolute Pressure is t

20 — HOT ROD CALC™Calculating ADI and Density Altitude Using Absolute PressureFor this example, you are at the Los Angeles County Fairplex Auto Cl

HOT ROD CALC™ — 21conditions are an unseasonably chilly 33° F, absolute pressure of 28.77 in Hg, and a relative humidity of 64% at 8:30 a.m.Calculate

22 — HOT ROD CALC™Calculate the Air Density Index (ADI) and Density Altitude for this example.First, clear the memory on your calculator, including te

HOT ROD CALC™ — 23For this example, the current local measured weather conditions are 80° F, absolute pressure of 29.15 in Hg, and 53.5% relative humi

24 — HOT ROD CALC™KEYSTROKES DISPLAY 0.3. Enter current weather conditions: TEMP S 60. °F(Absolute Pressure) P-ABS S 24.72

HOT ROD CALC™ — 25To translate a fuel correction index to a new jet number, recall your baseline was recorded with #78 jets, which according to the Ap

26 — HOT ROD CALC™2. Calculate water vapor content by subsequent presses of : (Water Vapor Pressure) P-WV 0.115 INHG (Saturation Water Vapor Pr

HOT ROD CALC™ — 271. Enter vehicle weight (including driver): LBS S 38402. Enter vehicle’s estimated rear wheel HP: HP S MSA 411.3. C

HOT ROD CALC™ — 1 HOT ROD CALC™The Hot Rod Calc™ Road and Strip Performance Calculator is specifically designed for today’s hot rod owner/builders, dra

28 — HOT ROD CALC™(HPc) and output for current weather conditions as well as MSA conditions.For this example, the track’s elevation is 3,963 feet abov

HOT ROD CALC™ — 29Notice within the ET output sequence, the ET predictions are displayed in 1/4 and 1/8 prediction sets based on current track conditi

30 — HOT ROD CALC™ HPc 1.211Notice that by changing the ME% from 85% to 80% (reducing the engine’s mechanical efficiency), the corrected H

HOT ROD CALC™ — 31Enter the estimated Frontal Area value: (Frontal Area) AREA S 19.006944 S FNext, see Appendix A — Body Style and Drag Coefficien

32 — HOT ROD CALC™1. Next, enter vehicle weight, and your actual ET and MPH, the Wind Speed, and if available, Wind Direction, to calculate how the wi

HOT ROD CALC™ — 33Your buddy has a 1978 Ford Mustang II with an estimated horsepower of 575 HP and made an ET run of 9.540 seconds. Calculate the esti

34 — HOT ROD CALC™KEYSTROKES DISPLAY 0.1. Enter the estimated Vehicle Weight: LBS S 4280.2. Enter the 1/4 ET: ET S 13.656 S3. Sol

HOT ROD CALC™ — 35Calculating Effects of Changing Tire SizesYour daily commuter has four-wheel drive, and you want some extra ground clearance for tho

36 — HOT ROD CALC™outputs, starting with the current final-drive ratio input.The effect to the final-drive (D-EFF) of going from a tire diameter of 28.9

HOT ROD CALC™ — 37Speed, RPM, Gear Ratios, and Tire RelationshipsSpeed, RPM, gear ratios, and tire sizes are interrelated, and with any three values,

2 — HOT ROD CALC™ TABLE OF CONTENTSGETTING STARTED ...4KEY DEFINITIONS ...

38 — HOT ROD CALC™Repeated presses of  will toggle through the inputs and outputs, starting with the gear ratio input. From the above calculation, it

HOT ROD CALC™ — 39gear is direct drive and therefore would be the same as the final-drive ratio you are solving for.KEYSTROKES DISPLAY 0.7. Enter yo

40 — HOT ROD CALC™ RPM S 3000. SPEED S 65. M PH GEAR S 3.08 RATIO10. Calculate the New Tire Size: (New tire dia

HOT ROD CALC™ — 41Lastly, while carburetors come in many sizes, they are not available in just any size. It is quite possible you won’t find one that i

42 — HOT ROD CALC™Calculating Carburetor Size With a Known Volumetric EfficiencyBuilding off of the previous example, you want to calculate your user-

HOT ROD CALC™ — 43you with this if they have an air-flow meter), as well as your engine displacement.In this example, your 1968 Pontiac GTO has a Ram A

44 — HOT ROD CALC™ RPM S 3800.2. Calculate the HP at 3800 RPM: HP MSA 321.966 At 3800 RPM, when your 400 CID engine is producing 445 pounds-f

HOT ROD CALC™ — 45BDCTDCThere are several compression ratio effects to consider when determining the appropriate ratio for your application: • The gre

46 — HOT ROD CALC™Your Hot Rod Calc needs several inputs to calculate a Compression Ratio, but you will need track them down and in some cases, measur

HOT ROD CALC™ — 47KEYSTROKES DISPLAY 0.1. Enter the values from the example: BORE S 4. IN STROK S 3.48 IN (Gasket Bor

HOT ROD CALC™ — 3 ET Prediction and HPc ...27 ET Prediction and Wind Conditions ...

compression ratio, whereas raising the overall chamber volume will decrease the compression ratio. Piston Dome, Deck Height, and Head Gasket Thickness

starting with the entered Stroke.To raise your compression from 8.5:1 to 10.5:1, your engine building shop would need to remove 0.098 inches of materi

1. Enter your Stroke and the RPM for which you want to determine piston speed: STROK S 3.48 IN RPM S 4000.2. Calculate the Pisto

HOT ROD CALC™ — 516. Enter the Piston Speed for which you want to determine an RPM limit, along with stroke of 3.48: FPM S 3500. STROK S

52 — HOT ROD CALC™Repeated presses of  will toggle through the inputs and outputs, starting with the entered Bore.While the exact displacement of the

HOT ROD CALC™ — 53Repeated presses of  will toggle through the inputs and outputs, starting with the entered Bore.Calculating Bore and StrokeBuilding

54 — HOT ROD CALC™4. Calculate the new Stroke length: STROK 3.797 INNotice you can also meet your goals by keeping the stock bore, and g

HOT ROD CALC™ — 55 APPENDIX A – BODY STYLE AND DRAG COEFFICIENTS*BODY STYLE DRAG COEFFICIENTOpen Convertible 0.5 – 0.7Station Wagon and Van Body 0

56 — HOT ROD CALC™ APPENDIX B – HOLLEY JET CHART AND JET ORIFICE AREA AND CONVERSION CHART Main Jet Number, Drill Size, and FlowJET NO. DRILL SIZE

HOT ROD CALC™ — 5763 .062 32564 .064 34165 .065 35766 .066 37467 .068 39268 .069 41169 .070 42970 .073 44871 .076 47072 .079 49273 .079 517

4 — HOT ROD CALC™ GETTING STARTEDYou may want to practice getting a feel for your calculator keys by reading through the key definitions and learning h

58 — HOT ROD CALC™92 .105 115093 .105 120094 .108 126095 .118 132096 .118 137597 .125 144098 .125 150099 .125 1570100 .128 1640.

HOT ROD CALC™ — 59Jet Orifice Area ConversionJet Size Dia. (") Jet Size Area (sq. ") Jet Size Dia. (") Jet Size Area (sq. ") Jet

60 — HOT ROD CALC™ APPENDIX C – Default SettingsAfter a Clear All () your calculator will return to the following settings:STORED VALUES DEFAULT VA

HOT ROD CALC™ — 61 APPENDIX D – Care InstructionsPlease follow the guidelines listed in this section for proper care and operation of your calculator

62 — HOT ROD CALC™ APPENDIX E – Accuracy/Errors, Auto Shut-Off, Batteries, ResetACCURACY/ERRORS Accuracy/Display Capacity — Your calculator has an eig

HOT ROD CALC™ — 63Replacing BatteriesShould your calculator display become very dim or erratic, replace the batteries.Note: Please use caution when di

64 — HOT ROD CALC™WARRANTY, REPAIR AND RETURN INFORMATION Return Guidelines1. Please read the Warranty in this User’s Guide to determine if your Calc

HOT ROD CALC™ — 65DAMAGES RESULTING FROM MISUSE OR ABUSE.To obtain warranty service in the U.S., please go to the website.A repaired or replacement pr

66 — HOT ROD CALC™

HOT ROD CALC™ — 67FCC Class BThis equipment has been certified to comply with the limits for a Class B calculating device, pursuant to Subpart J of Pa

HOT ROD CALC™ — 5Dimensional Function Keys  Millimeters – Identifies entry as millimeters, with repeated presses toggling between linear, area and vo

HOT ROD CALC™ — 1FCC Class BThis equipment has been certified to comply with the limits for a Class B calculating device, pursuant to Subpart J of Par

6 — HOT ROD CALC™Identifies/Converts to liters (liters).Identifies/Converts to milliliters (mL).Identifies/Converts to pound-force foot (lb-ft).

HOT ROD CALC™ — 7calculates current local water vapor pressure, saturation water vapor pressure, and dew point temperature. Default value is 0% RH.W