i have a 71' 240 which i recently INSTALLED A 83 TURBO ENGINE IN. MY CAR RUNS LIKE A BULLET AT 9 PSI.....HOWEVER,SOMETIMES I'LL NAIL THE THROTTLE AND SHE WILL POP OUT OF THE EXHAUST. THIS WILL HAPPEN ONE DAY AND THE NEXT DAY ITS FINE. OPINIONS?
When you shoot 2ft flames from your muffler, give me a call. You might be running too rich and the unspent gases are igniting in your exhaust. Could have a small leak in your exhaust somewhere. It is hard to say, could be a number of things.