Index Snowmobiles / ATV Snowmobile Polaris 440 PRO X Fan, 440 PRO X, 600 PRO X, 700 PRO X, 800 PRO X - instruction 2003 year
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ENGINE 2.4 Bore = 6.5 cm. Stroke = 6.0 cm. IHV = 17.1 cc Displacement = S Bore Stroke S Displacement = 199.098 cc R = IHV + Displacement IHV R = 12.643 Full Stroke Compression Ratio To calculate the Effective Compression Ratio, substitute the exhaust port height for the stroke in the Exhaust = 2.95 cm. Exhaust port height 29.5 mm Eff Disp = S Bore Stroke Effective Displacement Eff Disp = 97.89 cc Eff Comp = IHV + Eff Disp IHV Effective Compression Ratio Eff Comp = 6.725 In order to increase the Full Stroke Compression Ratio to 13.6, how much material do you need to R = IHV + Displacement IHV You know that: , and you want to find out IHV. Displacement = 199.098 cc, and we want R = 13.6, so then IHV2 = Displacement (R -- 1) IHV2 = 15.801 cc desired IHV to have 13.6:1 Full Stroke Compression Ratio IHV = INSTALLED HEAD VOLUME [CC] DISP= CYLINDER DISPLACEMENT [CC] R = COMPRESSION RATIO S = FULL ENGINE STROKE [CM] I = INCHES PER CC OF IHV B = CYLINDER BORE [CM] PI = 3.1416 R = (IHV+DISP) IHV I = S (DISP*25.4) DISP = (PI*B*B*S) 4 |