Test Budha Logo
Menu
Disclosure
This website is a participant in the Amazon Services LLC Associates Program. We are reader-supported. If you buy something through links on our site, we may earn an affiliate commission at no additional cost to you. This doesn't affect which products are included in our content. It helps us pay to keep this site free to use while providing you with expertly-researched unbiased recommendations.

The Best Rotary Compression Tester of 2021

  Updated on 19 October, 2021

Handpicked
Quality-Checked
Generated From 25K+ Reviews!
SaleBestseller No. 1
BlueDriver Compression Tester Kit (8 Piece Set)
  • 2 ½" triple scale gauge (0-300 psi, 0-21 kg/cm², 0-20 bar)
  • 16" rubber hose (with 14mm & 18mm spark plug adapters)
  • 18mm, 14mm, 12mm & 10mm adapters
  • 45° universal direct shaft & straight universal direct shaft
Bestseller No. 2
8PCS Professional Tester Test Kit Cylinder Compression Gas...
  • Exceeds Industry Standards, Precision Manufacturing, Improved Design Standards,...
  • Checking Compression On Petrol Engine Quickly And Accurately
  • Easy Pressure Release Button On Side Of Tester
  • Completed Kit Comes With Adapters For Most Applications
Bestseller No. 3
BETOOLL HW0130 8pcs Petrol Engine Cylinder Compression...
  • Checking Compression On Petrol Engine Quickly And Accurately
  • Easy Pressure Release Button On Side Of Tester
  • Completed Kit Comes With Adapters For Most Applications
  • Kits Includes 2 Rubber Cones Ends Which Do Not Need To Thread Into Head
SaleBestseller No. 4
BOSCH (FIX 7828 Professional Compression Tester
  • Measures cylinder compression to accurately diagnose engine condition
  • Compatible with most standard spark plug threads
  • Quick disconnect coupler separates hose from gauge for faster, easier connections to the...
  • Push button side release valve allows repeated testing without disconnecting
SaleBestseller No. 5
OTC 5605 Deluxe Compression Tester Kit with Carrying Case...
  • OTC's Deluxe Compression Tester Kit offers a complete package for compression testing on...
  • Kit includes the deep well connector used on recessed plug well style heads and the new...
  • Adapters work on both flat and tapered seat plugs; corrosion resistant nickel plated...
  • Extra long 25 inch flex hose gauge assembly with quick coupler allows easy viewing out of...

How We Score

Learn More
Our app considers products features, online popularity, consumer’s reviews, brand reputation, prices, and many more factors, as well as reviews by our experts.

Click on products MORE INFO button to explore, or read more About Us
8.9
Popularity
7.9
Reviews
8.4
Reputation
9.5
Quality

Buyer's Guide: Rotary Compression Tester

Rotary Compression Tester

Rotary compression testers are used by a wide range of industries. The Rotary Compression Tester is a part of a tool kit for testing the performance of your engine. "Come bring you the latest digital handheld rotary compression tester. This device has gone through 24 months of engineering and in-house testing that have led to the most accurate, highest resolution, handheld compression tester on the market."

In order to determine whether or not your Rotary Compression Tester is working properly you should check the speedometer needle. A reading of less than 250 rpm would indicate that the tester is not working properly. Look at the speedometer needle closely - is it moving up or down? Also check the rotation speeds and compare them to the listed speed in your manual. If the rotation speeds are different then your Rotary Compression Tester may be calibrated incorrectly.

If you have a Wankel Rotary Engine in your car you will need to use a special tool to pull the data out of the tester. This is called the Rotary Compression Gauge and it is mounted to the piston of the rotary engine. It looks like a large thermometer with a dome shaped light source in the middle. To use the rotary compression tester you just unscrew the piston from the engine. The gauge is now free and can be held by your hand.

To use the rotary compression tester you will need to first fill the container with the recommended amount of fuel. Next place the rotary compression tester's probe into the cylinder and start the engine. A rotary compression gauge warning light should come on if the compression is below the limit of the motor. If the warning light comes on continue to use the fuel but decrease the speed of your engine.

You should notice that your rotary compression tester creates a pattern called a chamber difference. Chamber difference indicates a varying pressure value in your cylinder. Increasing your cylinder pressure will increase the torque and horsepower of your engine, while decreasing compression will reduce power.

Rotary compression numbers tell you that the rotors are spinning at normal RPM. They are measured in RPMs. Rotary compression scores are measured from elapsed time versus the rotors RPM. The score is multiplied by the rotor force measured during testing to get the compression scores. Higher compression scores indicate a higher RPM which increases the torque.

You should note that the testing method you are using plays a big role in interpreting your results. Different speed controls will produce different compression scores. The test results can be interpreted by understanding how the data is recorded and interpreted. When the rotor face is being tested, the RPM of the engine is measured against the rotor face as the shaft spins. Rotator force is measured against the non-rotating face and the RPM is compared to the force against the non-rotating face.

To conclude, a rotary tester is a necessary tool for checking the performance of your piston valves. If you don't have one, you should strongly consider getting one. Most auto shops should carry them. If they don't you can order them online or at local car shops.

There are some different types of compressors that can be used in compression tests. For example, there are rotary type testers, reciprocating compression testers, screw / needle compression tests, and a variety of other types of compression testers. You should only buy a compression tester that is appropriate for your application so that you get accurate results. When you go to buy a compression tester, look carefully at the types of testing that are being done and make sure it is what you need. When you know what you need, it is much easier to shop for the best tester that meets your needs.

When you are looking at the rotary compression test results, note how the engine cranks up and down when the compression is tested at different RPM. This tells you the relationship between the engine speed and the compression level. You will know if the engine is running at a proper RPM (RPM) to achieve your desired engine performance or not. To get the desired result from your engine, make sure the compression levels are always high at all times - even when the cranking speed is low.

Rotary and analog tester are two types of testing that can help you diagnose your combustion problems. However, if your engine has no visible symptoms, then your problems might well be with other parts of the engine. A spark plug diagnostic test is usually the next step.