I'm frustrated with a new purchase - 1980 RX7. I knew it had problems with the loss of power but after getting a new carb installed, 2 sets of spark plugs and replacing 2 tanks of gas now the rotor tips lost ability to seal. Compression check when I first took it in was 120psi now it's 65-100 psi. I'm told I need a new engine. Any opinions out there? HELP?

 

If the car is bad flooded that can make it look like low compression.

 

try the trans fluid trick - this will "free up" the apex seals it they are stuck
anyway a remanufactured engine from Mazda is a good idea
i can get em cheap from the dealer

 

Most everyone is getting away from the ATF trick. If the engine has been flooded, add a cap full pf motor oil down each barrel of the carb. For a longer term solution, run a can of Seafoam through the fuel tank and see if it frees up stuck seals. If that doesn't help, it may be time for a rebuild.