Lambretta Images Archive

Lambretta photo's

Lambretta Images Archive

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Port Timing calculators

Lambretta Port Timing Calculator


All measurements in mm and cc

Exhaust Duration Calculator
Stroke:
Conod Length:
Piston Crown to Top of Barrel at TDC:
Height over Port, Top of port to top of barrel:
 
Exhause Duration (degrees):
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

Transfer Duration Calculator
Stroke:
Conod Length:
Piston Crown to Top of Barrel at TDC:
Height over Port:, Top of port to top of barrel
 
Transfer Duration (degrees):

Blowdown
 
Blowdown degrees:

Inlet Duration Calculator for piston port motors
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:

CC Calculator
Bore:
Stroke:
 
CC =

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

Notes
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