Charts/ Formulas & Torque Specs

Cubic Inch Displacement:
CID = bore x bore x stroke x 0.7854 x # of cylinders
Horsepower = (RPM x torque)/5,252
Torque = (5,252 x HP)/RPM
Valve Area = valve diameter x valve diameter x 0.7854
Rod Ratio = rod length/crank stroke length
Average Piston Speed = crank stroke x RPM/6
Rear Gear Ratio = (RPM at finish line x tire diameter)/(MPH x 336)
Volume (cc's) of Deck Clearance = bore x bore x 12.87 x depth of deck clearance
Volume (cc's) of Head Gasket = bore x bore x 12.87 x thickness of head gasket

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Compression Ratio = (comb chamber cc's + gasket cc's +deck CI cc's + (displacement x *2.0483)
                                                    comb chamber cc's + gasket cc's + deck CI cc's

                                        * = 2.0483 for 8-cyl    * = 2.7311 for 6-cyl    * = 4.0967 for 4-cyl

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Circumference = π x diameter
Area of Circle = π x radius x radius
Volume of a Cylinder = π x radius x radius x height

π = 3.1416

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Weights:

Oil	1 gallon = 7.0 pounds	1 quart = 1.75 pounds
Gas	1 gallon = 6.2 pounds	1 quart = 1.55 pounds
Water	1 gallon = 8.4 pounds	1 quart = 2.10 pounds

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Metric and Standard Conversion

The metric system is a decimal system of measurements used in scientific work for measuring length, weight, and volume. These basic units are modified with prefixes to express the units as larger or smaller quantities. Some of the common prefixes are:

Kilo: one thousand (1000)
Deci: one-tenth (0.1)
Centi: one-hundredth (0.01)
Milli: one-thousandth (0.001)
Micro: one-millionth (0.000001)

Length:

        1 Kilometer (km) = 1,000 meters = 3,280.83 feet = .6215 miles
        1 meter (m) = 100 centimeters = 39.37 inches = 1.09 yards
        1 decimeter (dm) = 3.937 inches
        1 centimeter (cm) = .3937 inches

        1 mile = 1.609 kilometers
        1 yard = .91 meters
        1 inch = 2.54 centimeters
        1 inch = 25.4 millimeters

Mass:

        1 kilogram (KG) = 1,000 grams (g) = 2.205 pounds
        1 pound = 453.6 grams
        1 gram = 1,000 milligrams (mg)
        kilograms x 2.20 = pounds
        1 ounce = 28.35 grams
        pounds / 2.20 = kilograms

Volume:

1 liter (l) = 1,000 cubic centimeters (cc) = 61.025 cubic inches
1 cubic inch = 16.387 cubic centimeters

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BOLTS AND TORQUE SPECS

U.S. BOLT GRADES


SAE 2	SAE 5	SAE 7	SAE 8

	2	5	7	8	SOCKET HEAD CAP SCREW
I.D. Marks	No markings	3 lines	5 lines	6 lines	Allen head
Material	Low carbon	Medium-carbon, tempered	Medium-carbon, quenched & tempered	Medium-carbon, quenched & tempered	High-carbon, quenched & tempered
Tensile strength (Minimum)	74,000 psi	120,000 psi	133,000 psi	150,000 psi	160,000 psi

U.S. BOLT TORQUE SPECIFICATIONS
Torque in pounds-foot

		2	2	5	5	7	7	8	8	Socket head cap screw	Socket head cap screw
Bolt Dia.	Thread per inch	Dry	Oiled	Dry	Oiled	Dry	Oiled	Dry	Oiled	Dry	Oiled
1/4	20	4	3	8	6	10	8	12	9	14	11
1/4	28	6	4	10	7	12	9	14	10	16	13
5/16	18	9	7	17	13	21	16	25	18	29	23
5/16	24	12	9	19	14	24	18	29	20	33	26
3/8	16	16	12	30	23	40	30	45	35	49	39
3/8	24	22	16	35	25	45	35	50	40	54	44
7/16	14	24	17	50	35	60	45	70	55	76	61
7/16	20	34	26	55	40	70	50	80	60	85	68
1/2	13	38	31	75	55	95	70	110	80	113	90
1/2	20	52	42	90	65	100	80	120	90	126	100
9/16	12	52	42	110	80	135	100	150	110	163	130
9/16	18	71	57	120	90	150	110	170	130	181	144
5/8	11	98	78	150	110	140	190	220	170	230	184
5/8	18	115	93	180	130	210	160	240	180	255	204
3/4	10	157	121	260	200	320	240	380	280	400	320
3/4	16	180	133	300	220	360	280	420	320	440	350
7/8	9	210	160	430	320	520	400	600	460	640	510
7/8	14	230	177	470	360	580	440	660	500	700	560
1	8	320	240	640	480	800	600	900	680	980	780
1	12	350	265	710	530	860	666	990	740	1060	845

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Pre-Owned Parts	Photo Gallery	Phone: 562 /945-7669
Contact Us	Race Team	Email: sales@dragparts.com

U.S. BOLT GRADES

U.S. BOLT TORQUE SPECIFICATIONSTorque in pounds-foot

U.S. BOLT TORQUE SPECIFICATIONS
Torque in pounds-foot