If you want more power you are going to have to dig deeper than a tune. Check my sig it took five years and lots of parts to get the power out of it. Im probably sitting at about 190-200 at the crank with all my mods up from the factory 154 at the crank. These engines will only see about 5hp from a tune alone. They can't move enough air by themselves. If you look at the old whipple kits it shows 8psi on a whippple can crank out 220-230 hp so to get any power naturally aspirated you have to get the air in and out much faster. Id start with headers and exhaust to get it out then work on the intake side. My morana roller rockers are VERY good upgrades. But if the air bottlenecks before or after they won't do much. My next step is port and polish intakes and stage 3 heads from morana i think with that i may be able to push 210 at the crank maybe. But my tune really only does two things for me it allows for the computer to compensate for the valves opening bigger and staying open longer (from the rockers) and to remove the old auto components so it doesn't go into limp mode. But for basics like i said good exhaust and an e fan and under drive pullies are a good bang for buck mod. Anything more than that and your really going to have to dig deep into this motor.
New DD-2009 Ford Mustang GT/CS candy apple red.
(sold)2003 XLT Tan 3.0L V6 5-speed, Lots of mods.
Last edited by pearlkid9988; 06-15-2014 at 11:45 PM.