I am voting this funniest thread ever!
Like everyone said you will definately know if you blow your motor and it will most likely send metal pieces out the side of the block. Do a google search for "eclipse GSX blown motor" very funny video of a guy who races a M3 in a GSX and blows his motor to smithereens.
As for the backfiring:
It's no biggie...as long as you don't mind smelling exhaust whenever you drive your car. Personally I like the smell and I backfire all the time. Just give your exhaust system a once over and make sure you don't have any exhaust leaks that can increase the frequency of the "bf"
Like everyone said you will definately know if you blow your motor and it will most likely send metal pieces out the side of the block. Do a google search for "eclipse GSX blown motor" very funny video of a guy who races a M3 in a GSX and blows his motor to smithereens.
As for the backfiring:
It's no biggie...as long as you don't mind smelling exhaust whenever you drive your car. Personally I like the smell and I backfire all the time. Just give your exhaust system a once over and make sure you don't have any exhaust leaks that can increase the frequency of the "bf"