Port Timing calculators

Lambretta Port Timing Calculator

All measurements in mm and cc

Auto Fill Other Fields

Once you have filled in your Stroke, rod length and Crown to top of barrel above. Click Auto Fill Button. Auto Fill to clear the fields press Clear

Inlet Duration Calculator
Stroke:
Conrod Length:
Piston Crown to Top of Barrel at TDC:
Piston height inlet side:
Inlet Floor Depth, Top Barrel to Bottom Port:

Inlet Duration (degrees):

Ignition Timing in mm Before TDC Calculator
Timing Degress A:
Conrod Length:
Stroke:

mm before TDC:

Corrected and uncorrected compression ratios calculator
Bore:
Stroke:
Exhaust port height
head volume (head cc)

uncorrected	-1
corrected	-1

Calculate BMEP using Torque
Torque (lbs ft)
CC

BMEP
Calculate BMEP using BHP
HP
CC
RPM

BMEP

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