I would like to purchase a test kit; any suggestions on brand, place to purchase, etc.? Thanks.
Thanks Dan. I need something to test both my Continental A65 and my some-day-to-come Lycoming. I think I have a handle on it now.
I believe you need different testers for A65 and the Lycoming. They have a different size orifice for different displacement.
No, they don't.
The gauge orifice for small engines has specified diameter of 0.040?
and an entrance angle between 59 and 60 degrees. You?ll find references
requiring a 0.060? orifice for use with a bore diameter larger than
5 inches. However, a manufacturer?s service information takes priority
over any advisory material. Lycoming SI 1191A and Continental SB 03-3
specify the 0.040? orifice for all engine models, including those with
bores in excess of 5 inches
Interesting.
So all of us out here that are using the E2A-1000 tester that ACS says is for cylinders of 5.00 inch bore and over are getting erroneously high readings?
The incorrect reading would only be during the calibrated orifice test conducted before the actual differential pressure tests on the cylinders. This test is to determine the lowest acceptable reading for today's compression test and won't affect the cylinder test. You might be surprised how low a compression reading this test will show as being acceptable.
Ed Holyoke
The incorrect reading would only be during the calibrated orifice test conducted before the actual differential pressure tests on the cylinders. This test is to determine the lowest acceptable reading for today's compression test and won't affect the cylinder test. You might be surprised how low a compression reading this test will show as being acceptable.
Ed Holyoke
Is this really a compression test?
A proper compression test would be accomplished with an automotive type compression gauge screwed into the spark plug hole and measures the compressed volume of air that is pulled through the intake valve based on cam lobe shape, and held by the rings and valves.
A leak down test will not show you a failed cam. But does show you where the leak is. Both are worth doing.