[Company Logo Image]     Performance Trends Inc

    Producing Quality Computer Tools for Racers and Engine Builders since 1986

 

 

 

 

 

Blowby Sensor to Measure CFM Flow from Engine Crankcase During Dynamometer or On Track Testing

for information on our Blowby Recorder

The most common checks for piston ring sealing are cranking compression and leak down. Both of these can falsely indicate a problem if a small amount of debris is preventing a ring from setting in the ring lands correctly or holding open a valve. The next check you do could show everything is fine. You also do not get a real measure of how well this engine seals up compared to that last engine you built. Neither of these check ring sealing while the engine is running. Now with Performance Trends’ affordable Blowby Sensor, you can actually measure CFM of blowby during your dyno tests.

Hook up the blowby sensor to your valve cover following the instructions with your sensor.  (Click here for a copy of these instructions.)  Hook up the electrical lead to one of Performance Trends’ DataMite data loggers.  Pick the built in Blowby Sensor calibration for your range of sensor and you’re ready to test measure the CFM of blowby from your engine at all engine RPMs.  Now you can get a history of your engines’ blowby levels.  For example: last year you were running 3.3 CFM at 4000 and 3.7 CFM at 7000 RPM.  This year with your new boring technique, you’re down to 2.2 CFM at 4000 and 2.3 CFM at 7000.  Now you can really measure if you are going in the right direction.

Other features include:

Large 1” diameter inlet and outlet to be able to handle 1000+ HP engines.
Rugged, all aluminum construction.
Three (3) flow ranges available to handle most any size engine with good accuracy.
Can measure small flows in the reverse direction. This is good for diagnostic work and is used by the Performance Trends’ DataMite software to warn meter may be installed backward.
Can be used in any dyno system which provides 5VDC power, can measure a 0-5 volt output and allows you to type in a calibration table of CFM for various voltage outputs.

 

Blowby Recorder

This hand held device lets you display the blowby as either CFM (cubic feed per minute) or LPS (liters/second) without need of a data logger.  You can also record blowby for as little as a few seconds or for up to several hours.  Then you can playback your data on the Recorder, or download to the free Blowby Analyzer software for graphing, printing, saving, etc.

Blowby Recorder

 

Blowby Logger's main features include:

User selectable averaging time, from None (meaning 0.1 second readings to catch fast changes) up to 5 second averages for good average readings and long recording times.
Recorder Options of Start and Stop recording, erasing data, and playback on the recorder.
Free software lets you send recorded data to your PC for graphing, printing, saving, adding comments, and opening old data files  (Win 98, XP, Vista, Win 7).
Display blowby readings as either CFM (cubic feet per minute) or LPS (liters per second).
Option to provide a linearized 0-5 volt DC output signal for easier recording by third party data loggers, for example a dyno system or vehicle data logger.  (Performance Trends' DataMite loggers can record the standard non-linear output with no problems.)
Rechargeable lithium Ion battery for long life and charging via USB cable to PC.
Advanced Calibration factors let you fine tune your blowby meter's calibration.

 

Blowby Data Logger Program

 

 

More Info:

Click here  for installation tips.

 

To Order:

Click here for prices.

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

Electronics like Blow By Sensor have a limited 1 year warranty.