Originally Posted by Strip Poker 388

Nope .A buddy of mine at MSD sent it to me and I posted it on a few sites,they said its not a good motor, that its going to break the stang, the motor vibrates real bad ,cranks fail alot , bad design.I posted it on speedtalk and the owner responded there , alot of engine builders there gave some pretty good info about it,

960 lbs , the 180-degree crank is going to shake it apart.
Average operation RPM range was 1400-1600rpm
starter motors where 72volt and rated at 16HP
Each piston has 6 rings on it and has MASSIVE ring drag. Plus, they weight 4 pounds apiece







It's mine. They vibrate some between 1600 and 1900, but really smooth out around 2200, and really start singing around 4000. I know guys that have twisted them to 5200, but my rev. limiter is set at 4800. The factory starter was 24 volt, but it's history anyway. I use dual Powermaster Chrysler V8 racing starters on mine, one on each side. They are working great so far. The factory pistons use 5 rings, but you don't have to use all of the grooves, and you don't have to use stock pistons. My engine uses 4 Total Seal rings on modified stock pistons. My second engine is getting custom pistons for the 32 pounds of boost that it will see on a regular basis in my pulling tractor. These old engines will make ALOT of power when built correctly. They really like turbos due to the 180 degree cranks. I built the Mustang just for fun, I don't plan on breaking any world records with it.

Several years back there was a guy named Bob Patterson out west that ran a GAA powered boat. The engine was basically stock except for the intake and carbs. It was very competitive with dual big block Chevy combos at the time.