There is quite a selection of compression testers available on Aircraft Spruce.
How do I know which one will be compatible with my engine? I have an O-320-D2A with ECI cylinders.
ok, let me elaborate on my question. It seems that bore size is the critical factor. Many of the testers say "for engines with bore diameter 5" or less". I believe the O-320-d2A has a bore of about 5.125" (although could this be different with my overhauled engine with ECI cylinders?).
ACS has a tester for engines with larger bores http://www.aircraftspruce.ca/catalog/topages/atsdifferentialtesters_lgorifice.php
but these say they are for engines over 1000 cu.in. But I believe the O-320 has a displacement of only about 320 cu.in.
Seems to be a discrepancy here... larger bore but smaller displacement?
Orifice size seems to be another critical factor... either .040" or .060". Anybody know which would be the right size for an O-320-D2A?
How do I know which compression tester is suitable?
Hi Phil,
I have an Aerosport O-360 in my -7A, and just had this conversation with them recently. They told me the large bore version is really for big radials. For our engines he said to use the small bore with the 0.040" orifice.
There is quite a selection of compression testers available on Aircraft Spruce.
How do I know which one will be compatible with my engine? I have an O-320-D2A with ECI cylinders.
Phil, This subject has been extensively discussed on this forum before. The archives should probably be your first port of call on this type of technical question.
Hi Phil,
I have an Aerosport O-360 in my -7A, and just had this conversation with them recently. They told me the large bore version is really for big radials. For our engines he said to use the small bore with the 0.040" orifice.
