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The target of this topic is to present the parameters linked to the TC Max timing belt.
Driving parts (front, rear and timing belt) are parts manufactured by GATES. The references are clearly identifiable on the parts, and allow to have the characteristics of the system.
The primary parts:
Front Sprocket (GATES) 8MX-30T-12:
8MX: 8mm pitch, compatible with GT and GT2 profiles
30T: 30 teeth (The meaning of T is unknown, there’s nothing in the catalog, 8MX-30S-12 wheels are found)
12 for a 12mm width belt
Rear Sprocket (GATES) 8MX-120T-12:
8MX: 8mm pitch, compatible with GT and GT2 profiles
120T: 120 teeth
12 for a 12mm width belt
Belt: 8MGT-1760 (ref Gates: 9274-0220)
8MGT: 8mm pitch with a GT profile
1760: length of 1760mm
220 teeth
So we have a drive ratio of 1/4 (basically, the rear wheel rotates 4 times slower than the engine). The timing belt prevents slippage between the front and rear sprockets.
By making small calculations, we find that the ideal distance between the front and rear sprockets is 568.5mm.
The Gates catalog features a 32-tooth front sprocket, which seems compatible (8MX-32S-12).
By installing it, we would change the drive ratio from 1/4 to 4/15 (or 0.266). The ideal center distance becomes 565mm, which is 3.5mm less. it seems acceptable with the position of the rear wheel.
With the modification of the drive ration, if the engine has the necessary power, we would go from a speed of 85km / h to 90.6km / h.
Cool, une TC noire dans le garage !
, le il y a 4 années et 9 mois.
