[Company Logo Image]     Performance Trends Inc

    Producing Quality Computer Tools for Racers and Engine Builders since 1986

 

 

 

 

 

Valve Spring Tester v1.1 for Windows 95/98/Me/NT/XP/2000

Computer Program, Electronics and Sensors to Measure Valve Spring Rates, Seated Force, Open Force, etc.

Manual Spring Tester                 Automatic Spring Tester (New Dec 2006)
        Click here for specs on our valve spring testers.

Our Valve Spring Tester software works with our Black Box data logger or Power Technology's spring tester.  (Click here for info on our Power Tech software upgrade.)  It comes in 2 versions, a very easy Basic version, and a full featured Plus version.  The screens below show the 2 versions.

Basic version of Software (very simple)

    

The Basic version shown above is just this screen.  It lets you test springs one at a time and very accurately determine Seated Force and Open Force at spring lifts you enter, Spring Rate, Binding Height, and Bind Height Clearance, and Non-Linearity in percent.

 

Plus version of Software (all features)

The Plus version lets you record, save, analyze, compare, graph, report and print your results, saving you time and providing accurate and professional results.  Results include:

Spring Rate
Force at Seated Spring Height
Force at Open Height
Height for a user defined spring force
Bind Height
Bind Height Clearance (between Open Height and Bind Height)
Linearity (non-linearity)  Click here to see graphs illustrating this calculation.
Damping  Click here to see graphs illustrating this calculation.
Test Cycle Time, Test Open Rate, Test Closing Rate

Other screens from the Plus version are shown below.


The Valve Spring Tester can be ordered with either the Basic or Plus software.  Basic versions can be easily upgraded to the Plus version for $100.

Other Plus features include:

You can select if intake specs (like open height) should match exhaust specs.
Program can determine open height from cam specs like Tappet Lift, Rocker Ratio, Lash, etc.
Program can screen all results for up to 3 user defined limits, like if Spring Rate falls outside a range of 300 to 350 lbs/inch.
You can search results (like a data base) for certain words in the comments, test date, Customer name, etc.
Showing results for Spring Height (like measured with a ruler) or Spring Compression (measured from Seated Spring Height).
Professional printouts of reports, which can even include your company's logo.  
Much more.

Here's a printed report from our Automatic Valve Spring Tester, showing its outstanding repeatability (highlighted in yellow).  It also shows where your company logo can go, in the upper left corner.

Click here to view the PDF file of this report with better detail and quality.

 

Here's a couple of calculations unique to Performance Trends' spring analysis: damping and non-linearity.  These are illustrated in the graphs below.

Damping lets you rate the damping effect of dual and triple springs with dampers.  The higher the internal damping in the spring (like a shock absorber), the more heat that is generated, but also the better chance of keeping the valve train under control by avoiding spring surge.

Non-Linearity lets you see if the springs are linear or not.  Sometimes springs are designed to be non-linear, and now you can actually measure 'how much'.

    

 

Performance Trends Valve Spring Tester

 
Manual Spring Tester                                                                          Automatic Spring Tester (New Dec 2006)

Spring Tester Specs:

Manual Spring Tester:

Spring Height measurement range:  .65 to 3.00 inches (16.5 mm to 76.2 mm)
Force Range:  0 to 1000 lbs (0 to 450 Kg)  *  **

Automatic Spring Tester (New Dec 2006):

Spring Height measurement range: .25 to 4.00 inches (16.5 mm to 101.6 mm)  Greater heights and .000 minimum height are optional.
Force Range:  0 to 1000 lbs standard (0 - 450 Kg) with 90 psi air pressure  (1800 lbs force can be generated with 150 psi air pressure and measured with optional 2000 lb load cell) *  **

* Higher ranges up to 1800 lbs  are possible by recalibrating.  The Manual Tester needs to be bolted securely to a bench top for testing high rate springs.  The Automatic Tester does not need to be bolted down, but does require shop air pressure, 90-150 psi.

** Special 0-250 lb and 0-500 lb range testers are available for lighter duty springs for the same price.  As these are more sensitive instruments, you must be careful not to over-range these testers.

 

Power Tech Software Upgrade Kit:

Our software can be added to a Power Tech spring tester using our USB interface.  Click here for details.

 

What You Need:

IBM or compatible computer with Windows 95, 98, Me, XP, 2000 or NT

 

What You Get:

Program CD with user manual in PDF format on the CD. Example test files preloaded in the Example library for you to start with.  Tester includes tester shown above, cable to connect to computer's serial (DB9) input port, power supply and factory calibration and "quick start" sheets.  User manual is on the CD, but is available printed at a nominal charge.


More Information, Download Demo:

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

Click here for prices.

Click here for User's Manual.

Click here for customer feedback.

 

To Order:

Call 248-473-9230. Visa, MC, Am Exp, Discover or COD accepted.