I'm not new to the mustang thing, however I am to the technical side so all the info I can give is what was given to me. For starters, I purchased the car back in march and was told by the previous owner that it could use a new tune b/c he had installed a smaller blower pulley since the last tune and that it was running rich/lean b/c of this, and it would sputter sometimes when getting off the throttle and the idle was terrible. So I took it to Murillo Motorsports in San Antonio, TX which is where I was stationed at the time and they were not able to fully tune it b/c of whatever problem. In the end they chipped it with a safe tune according to what they thought could possibly be the problem. I couldnt afford to have the engine gone through at the time since I essentially pissed away 1300 bucks for the "safe tune" and new coils and wires in an effort to diagnose the problem. They guestimated that it was something in the block and said I'd be better off just buying a MMR 900 block to handle the increased boost........like I said before I have no technical knowledge, all I can do is go with what people tell me until I can either buy a new block, or have someone go through mine to see exactly what the deal is. Thanks for the input
as far as mods go, my car has :
Vortech V2 S/C with aftercooler & smaller pulley,
bbk longtubes,
borla SVO side exhaust, bored .20 over with bigger pistons,
K&N filter, 4.10s, bbk springs, vortech fuel pump, 42# injectors, MSD ignition, B&M shifter