second gen rebuilt
 

I knw that if u doing a swap u have to make sure ur enging is compress. After rebuilding it do u have to compress the enging ???

Moving this thread from the site suggestions forum to general rotary tech support instead.

Not sure what you are asking but I'll give it a crack..
If you got an engine that has good compression on it and install it,then it should have compression after you install it.Nothing should deter that.Unless the engine has sat for god who knows how long and not properly stored.Then it's a crapshoot.
Now IF you rebuilt the engine then YES it should be at least compression tested to roughly show that it is indeed working so you don't install an engine that shows 0 and then wonder why it doesn't work.
The fresh rebuild may not show exactly 100% compression as everything needs to break in and get settled,but it should show decent enough compression to tell you that the build was successful.

U did anwer my question thank u i meani knw it was a dumb question to ask but still need it to make sure its my first timeworking with a rotor n i really dont knw much bout It thank u