Make your own free website on Tripod.com
Data For Scrutineers
  T2-1. Measuring Engines:
The following formula holds good for millimeters or inches; the result being either cubic centimeters (cc) or cubic inches (c.i) B x B x .7854 x S x No. of cylinders: in which "B" is the bore diameter, "S" is stroke of the motor. In other words, Bore squared multiplied by .7854 multiplied by the stroke multiplied by the cylinders of the motor concerned.

T2-2. OEM Parts
Any vehicles that require OEM parts, their components must retain their original identification marks.

T2-3. Rotary Motors:
The capacity of these units is calculated by applying the following international formula. Manufacture's CC Rating calculated by the following formula: Capacity of one working chamber x no. of rotors.

T2-4. Roll-Bars and Cages:
Where metric sizes are specified, these will be adhered to, to the second decimal place (e.g. 31.75 or 32 mm -NOT 31 mm). This will apply in all cases involving safety.

T2-5.
No plating is permitted on roll-cages, or any other 4130 Chrome-moly tubing.

T2-6 ISO Metric Bolts:

Metric
Diameter
Imperial
Equivalent.
M6
1/4
0.25"
M8
5/16
0.312"
M10
3/8
0.375"
M11
7/16
0.437"
M12
1/2
0.5"
M16
5/8
0.675"

Symbol `88' Sym    bol `HT' (high tensile)

T2-7 Conversions:

1 Centimeter 10 mm 0.393"
1 inch 25.4 mm 2.54 cm
1 Kg. 1000 grams 2.204 Ib
1lb 454 grams
1 litre 1.75 uk pints
1 imp. Gallon 4.4546 litres


T2-7-1 To Convert:

cc into cu. ins.-      multiply by .061
cu. ins. into cc.- multiply by 16.389
lb. into Kg - multiply by .453
kg into lb.   multiply by 2.204
Gals. (UK) into litres multiply by 4.546
Litres into gals (UK) multiply by .219
Inches to millimeters   multiply by 25.4
Millimeters to inches     multiply by .0394
1 Gal. water app.10 lb
1 Gal. Methanol app.8lb
1 Gal. oil approx. 9 lb
1 Gal. Petrol app. 7.1 lb
5 Qts oil approx. 11 lb
1 Qt oil approx. 2.1/4 lb