Compression Tester

hecmanortiz · 03-31-2010, 08:31 AM

What are the differences between piston and rotary compression testers? I have a buddy who has a piston compression tester and this is something I wouldn't use frequently so why spend the money on one for use maybe twice.

Tks.

PercentSevenC · 03-31-2010, 10:57 AM

A piston engine compression tester only shows the peak compression for one chamber. To measure rotary compression, you either need to use a rotary tester, which records all three pulses, or remove the valve thing from a piston engine tester so you can at least watch the needle and estimate all three pulses.

hecmanortiz · 04-01-2010, 05:02 PM

Great thanks.

03-31-2010, 08:31 AM	#1
hecmanortiz Rotary Fan in Training Join Date: Aug 2009 Location: Hamilton, Ohio Posts: 40 Rep Power: 0	Compression Tester What are the differences between piston and rotary compression testers? I have a buddy who has a piston compression tester and this is something I wouldn't use frequently so why spend the money on one for use maybe twice. Tks.

04-01-2010, 05:02 PM	#3
hecmanortiz Rotary Fan in Training Join Date: Aug 2009 Location: Hamilton, Ohio Posts: 40 Rep Power: 0	Great thanks.