jalexquijano

the former one was smaller. This one has a 2.5 diameter bolted from the manifold to the tail pipe. The MSA exhaust comes with a Xcelerator turbo muffler: http://www.apexhaust.com/product/automotive-light-truck/muffler/xlerator-big-max-turbo-mufflers/ My 1972 240z has the following specs: Hitachi distributor with Pertronix 1761 ignitor module and ignition coil. NGK BP5ES Spark plugs gapped at .031 Timing adjusted to 16 BTDC. Schneider 274F camshaft with new rocker arms, retainer springs and lashpads. Round Top 3 screws SU CARBURETORS Remanufactured by Ztherapy. I removed all the emission devices and plugged the balance tube. the only thing plugge is the the pcv valve and the hose that goes to the crankshaft. Please advise how to solve this deceleration popping when downshifting and releasing the gas pedal. If i place the shifter in neutral there is no popping.

Just replaced my former stock 2" exhaust system with Dynamax muffler with an MSA Premium exhaust for stock manifold system: Motorsport! MSA Premium Exhaust System, 70-72, 74 240Z-260Z (For Stock Manifold) - The Z Store! Nissan-Datsun 240Z 260Z 280Z 280ZX 300ZX ( Z31 Z32 ) 350Z 370Z Parts anyway after installing it i am noticing a loud deceleration pop at the exhaust which i didnt had with the former exhaust system. so i tightened the tailpipe rear and front clamps as there is no gasket in that área. the only 3 gaskets that come with this exhaust system are the manifold to downpipe gasket and the two pipe to pipe 2.5 inches gasket. I even lowered the mixture to 1.5 turns clockwise to lean the mixture and there is still popping at the exhaust. Any clues? My BTDC timing is set to 16 BTDC and My camshaft is a Schneider 274F. Just to confirm i had no backfire with the former Steel stock exhaust. What could be causing this?