Why use Lambda?

Using only CO and Oxygen to try and determine a “good” A/F ratio is very difficult. Lambda uses a math calculation of all the oxygen and carbon-bearing gases to calculate the ratio of air to fuel. At least four gasses are required to calculate Lambda. These gasses are HC, CO, CO2 and O2.

What will Lambda tell you?

A proper A/F ratio, proper ignition and compression are the three areas that are required to achieve efficient combustion. Lambda tells you if the A/F ratio was sufficient by easily ruling in or out lambda as being the cause of insufficient combustion and high emissions. For example, if your Lambda is in the range of .95 to 1.05 and your manifold vacuum is at least 18”hg with a steady needle indicating good compression, the ignition system is the likely suspect of incomplete combustion.

The Lambda Calculator uses the Brettschneider formula. Pre or post CAT exhaust gases can be used for the calculation; it does not matter. If your gas analyzer does not deliver a lambda figure for you automatically, you can use this program that will!

Why use Fuel Volume Calculations?

In an engine's fuel supply system fuel pressure within OE spec does not necessarily mean that fuel volume is also sufficient. Fuel volume is dependant upon the engines fuel supply system being able to deliver sufficient quantity of fuel to operate the engine under all conditions.

What will Fuel Volume Calculations tell you?

If the maximum capability of the fuel supply system is sufficient then the volume will be also be sufficient under all engine operating conditions.

This calculator will deliver the maximum amount of fuel required for any engine based on engine size in CID or Liters. To calculate max volume requirements simply enter the engine size in CID or Liters and the maximum RPM operating range of the engine being tested.

Why use VE Calculations?

With proper input data this program can be used to identify a skewed MAF sensor input to the PCM.

What will VE Calculations tell you?

If you have verified that there are no intake and exhaust restrictions present and a VE calculation of less than 75% is delivered by the program under operating conditions defined in the help file an incorrect MAF input by the MAF sensor (more likely) or PCM calculation error (less likely) should be suspected.