Head Calculations using TSR software by Sainty
                                                 
                                                 
Ok here goes with the new specs after redoing both the stroke length and the exhaust opening
                                                 
The very first thing to be done is to calculate the compression ratios both corrected and uncorrected.
By using Compress exe. You can estimate the octane requirements and the cranking psi of the engine

 Ignore the squish width on this program as it does not alter any of the specs for the head.


Next thing is to calculate the mean squish velocity using some of the above figures in the Squish exe. Program




Both these screens are from the head design program for spherical bowls and straight cut squish bands.
You can see that the head volume is actually smaller then you have already got but this does not allow for the 
radius between the squish band and the chamber which will add at least 3 cc’s and also the plug will add a 
little extra.
 
This is a nice safe head for 91 octane fuel. The squish band is machined at 1 degree above the piston 
crown angle to reduce the likely hood of detonation.
 
As ever if you have any questions just ask,
 
Mart.


From TomsTuningTools Bundle Check it out

The Head program allows you to calculate the design of a two stroke combustion chamber. If you know the desired squish area, 
squish clearance, volume and the piston data you will be able to calculate a bowl formed combustion chamber within the following combinations:
# Spherical Piston - Spherical squish
# Spherical Piston - Conical squish
# Conical Piston - Conical squish
# Conical Piston - Spherical Piston is not supported; no one needs it I guess ;-)
The main window consists out of a part where you type in the required data and a part with an image to show where to measure the data. 

The pull-down menus allows for the changes between the different types of squish and piston. 



A 49cc dome


A 47cc dome