Engine Related

Name: Race Time Promotions
Address: 1622 Sawdust Road, Suite B6, Spring, Texas, 77380, United Sates
Telephone: +17138511905
Price range: $$

Helpful Data and Formulas

Cubic Inch Displacement	= Bore x Bore x Stroke x (.7854 x # cylinders)*
* use the following:	8 cylinder = 6.2832
	6 cylinder = 4.7124
	4 cylinder = 3.1416



CC in Deck Clearance	= Bore x Bore x 12.87 x Deck Clearance

CC in Head Gasket	= Bore x Bore x 12.87 x Compressed Gasket Thickness

Net Combustion Chamber Volume	= Combustion Chamber Volume Dome Volume + Deck Clearance
CC + Gasket CC

True Compression Ratio	= (Cubic Inch Displacement x 16.39 / Number of Cylinders / Net
Combustion Chamber Volume) + 1

BoreStroke Ratio	= Bore / Stroke
	(Theoretically, the larger the Bore-Stroke ratio, the higher the engine
	will RPM.)

Rod Ratio	= Length of rod (Center to Center) / Stroke
	Common rod ratio in drag racing is about 1.8, versus circle track 1.7)

Crankshaft Throw	= Stroke / 2

Carburetor Size	= Cubic Inch Displacement x Max RPM / 3456 x Volumetric Efficiency

Stock carburetors have a VE of 85%, Good reworked carbs
will have a VE of 98%Or Max	RPM = Carb size x 3456 / VE/ CID

Horsepower based on ET		HP = Weight / (ET / 5.825)³

Horsepower based on Trap Speed		HP = (MPH / 234)³ x Weight



Intake Manifold Surface your intake when you surface your block or heads.
		Intake Manifold
Block or Heads		Side		Bottom
0.005		0.006		0.009
0.01		0.012		0.017
0.015		0.018		0.025
0.02		0.025		0.034
0.025		0.031		0.043
0.03		0.037		0.052

Miles Per Hour	= RPM x Tire Diameter / Final Gear Ratio / 336.31
	OR = RPM x Tire Rollout / Final Gear Ratio / 1056


To set Chevrolet Valve Lash:
When the #1 cylinder valves do not move do not move as the crank
approaches TDC 0, the engine is in the #1 firing position. Move crank to Zero degrees.
Adjust	Exhaust #8 #4	Intake #7 #2
Rotate Crank 180and Adjust	Exhaust #3 #6	Intake #1 #8
Rotate Crank 180and Adjust	Exhaust #5 #7	Intake #4 #3
Rotate Crank 180and Adjust	Exhaust #2 #1	Intake #6 #5

Common Torque (FT-Lbs.):
Mains 70-80	Rods 50-65	Heads 65	Intake 30
Exhaust 20	Oil Pan 15		Cam 30		Carburetor 10
Damper 70	Flywheel 65	Clutch 30	Water Pump 30

Common Clearances:
Main Bearings		0.002-.0025
Crank End Play		0.002-.0025
Top Ring End Gap		Stock 0.010	Race 0.020
Second Ring End Gap		Stock 0.012	Race 0.015
Rod Bearings		0.002-.003
Steel Rod Side Play		0.008-.010
Aluminum Rod Side Play		0.050-.070
Deck Clearance Minimum		Stock .008	Race 0.004
Piston to Wall		0.005-.008
Piston To Valve		Intake 0.080	Exhaust 0.100
Oil Pan to Pick up		3/8 No more or no less!