hey

so I'm getting ready to buy a complete engine swap from a local engine depot but before i bought it i wanted to check and confirm the engines compression. what should a stock twin turbo 13b from an FD read with " 60-80k " miles?

thanks for the help

 

How will compression be checked? If the engine is out of the car, there is no way I know of to get any meaningful compression reading. All you can do is pull the leading plug and listen for even pulses at each rotor.
Otherwise with the engine in the car, assuming a piston engine tester, you'd want to see something around 100 psi or so on each rotor with that mileage, and they should be pretty even between rotors.

 

No more the a 15psi difference between each rotor

 

Huh? I thought the FSM was 15% difference or so, 15 psi isn't a large margin