[Company Logo Image]     Performance Trends Inc

    Producing Quality Computer Tools for Racers and Engine Builders since 1986

 

 

 

 

 

Compression Ratio Calculator v2.3 for Windows 98/Me/XP/2000//NT/Vista

Computer Program to Calculate Compression Ratio, Boring, Stroking and Other Common Engine Building Dimensions.


Compression Ratio Calculator is probably the most detailed compression ratio calculator program available. It includes these features:

Calculating compression ratio, cylinder volume, and engine displacement from a variety of different inputs.

Finding which input value (chamber CCs, Deck Ht Clearance, etc) will produce a desired C.R. 

Determining the % contribution of various dimensions on the overall compression ratio.

Calculating Bore/Stroke and Rod/Stroke Ratios.

Calculating boring and/or stroking effects.

Determining required bore or stroke for a desired displacement.

Calculating cranking compression pressure and dynamic compression ratio.

Saving and printing specs.

Using English or Metric units.

Determining piston dome or dish volume.

Enter Head Gasket volume as Bore and Thickness, or Volume CCs directly.

Determining any of the following: rod length, deck height, deck height clearance, piston compression height, or stroke based on you specifying the other 4.

Click on the blue link for an example of a printout (including some Plus Version options).

 

Compression Ratio Calculator PLUS adds even more feature to make this the "go to" software for professional Engine Builders.  These include:

Calculating Effective Compression Ratio (used by supercharger companies to show requirements for boosted engines).
Calculating Piston Speed, Gs, and estimating Rod Bolt Loads for a particular RPM.
Adding more input details to better estimate Cranking Compression pressure.
Being able to pick Gasket Bore Diameter and Gasket Thickness from known FelPro gaskets.
Being able to calculate the effect on "Chamber CCs in Head" by milling the head.
Being able to calculate Piston Dome CCs based on geometry.

Plus Version's screen, with blue arrows and blue border highlighting some of the additional features.  It also shows the "Pick a Felpro Head Gasket" feature (light blue frame) by clicking on the "Clc" button for Gasket Bore or Gasket Thickness.

 

New Plus Version Options

 

Plus Version's Calculated Piston Dome CCs from Geometry

 

 

What You Need:

IBM or compatible computer with Windows 95/98/Me/XP/2000/NT and Vista.  Click here for Vista tips.

 

More Information, Download Demo:

   Click here to go to our Demo Downloading page to download a FREE demo of this program.

Click here for a movie demo of using our Compression Ratio Calculator program from the Engine Log Book.

 

To Order:

 Compression Ratio Calc. Standard: Our DOWNLOAD ONLY option. If you only want the unlocking code and DO NOT want a CD shipped, click on Add to Cart below. You will not be charged shipping.
$39.95

____________________________________________________________________________________________________________________________

Compression Ratio Calc. Standard: If you want a CD shipped to you, click on Add to Cart below. There will be shipping charges added to your order.
$39.95 plus shipping

____________________________________________________________________________________________________________________________

Compression Ratio Calc. Plus: Our DOWNLOAD ONLY option. If you only want the unlocking code and DO NOT want a CD shipped, click on Add to Cart below. You will not be charged shipping.
$69.95

____________________________________________________________________________________________________________________________

Compression Ratio Calc. Plus: If you want a CD shipped to you, click on Add to Cart below. There will be shipping charges added to your order.
$69.95 plus shipping

____________________________________________________________________________________________________________________________

You can download this program as a demo Free to try it. If you want to order it, call 248-473-9230 with your Visa, MC, AmExp or Discover card. Performance Trends can provide you an "unlocking code" number to activate all features (bring it out of demo mode). When newer versions are released, you can download the latest demo and activate all features with this same "unlocking code".

The "on screen" help explains all features, inputs and outputs. This program does not come with a user’s manual.

Click here for more price and ordering info.