OK so I removed the entire engine and transmission out of the car. I hooked up an oil line from the filter pedestal to the return line below crank pulley. I hooked up a battery to the starter and did a compression test using a piston engine tester.

Engine cold.

225-250 rpm it shows 65 psi for the rear and 95 psi for the front.

I squirted a little 30W mineral oil and

rear showed 90 psi but you can tell the pulses were uneven. Front showed 120 psi.

I know the rear lost compression (cracked apex seal?) so the engine needs a rear housing and seals.

Question: Is this normal to get 20% higher number just from squirting a little oil? Is this normal?

 

Yes.

 

it is.. it's a common technique we use when we de-flood rotary engines. squirt of ATF into the plug hole UPS compression in order to get it starting again.


Sooo as dguy say, yes that is normal.

 

Why ATF?

 

helps break up carbon mainly.... i prefer a little 2 stroke if i need to unless your actualy tring to break up carbon then use the ATF.

z

 

We use 2 stroke as well, it doesn't foul out the plugs like regular oil and doesn't smoke as much as ATF.