I know a few people must have tried this and hopefully we are getting a decent picture of what effect this will have. I'm talking about using a manual or electronic boost controller to raise the stock boost level and hopefully to get the MS to hold more boost after 5500 rpm, by taking boost control away from the computer.
I used to own a dodge SRT-4 and raising boost on that car almost didn't seem worth it for me, at least not on a mostly stock setup. It gained decent power... 20-ish hp from 2-3 psi, but there were tremendous drawbacks, mostly in the form of part throttle over boost... basically the turbo was too small and without computer control would spool to full boost at low throttle openings and RPM. Unfortunately all this air could not be forced into the intake and so would 'stall' and cause audible and feelable compressor surge.
It would also cause the car to run too lean at part throttle. Basically the car had to be driven like an on/off switch... either granny the hell out of it or drive full blast... anything in between and the car ran like crap. Also, Dodge techs could easily scan the ECU and see that boost had been running higher than stock and cause warranty issues.
So... if you raise the boost on the speed3 by taking away computer control... does this cause any part throttle overboost or any lean running issues?
How much boost can you run before the computer start reacting badly? The SRT-4 would start to cut fuel or pull timing at anything above 18 psi, and you would have to start doing things to either 'trick' the ECU, or you'd have to upgrade to one of the Mopar stage kits which would allow more boost.
I used to own a dodge SRT-4 and raising boost on that car almost didn't seem worth it for me, at least not on a mostly stock setup. It gained decent power... 20-ish hp from 2-3 psi, but there were tremendous drawbacks, mostly in the form of part throttle over boost... basically the turbo was too small and without computer control would spool to full boost at low throttle openings and RPM. Unfortunately all this air could not be forced into the intake and so would 'stall' and cause audible and feelable compressor surge.
It would also cause the car to run too lean at part throttle. Basically the car had to be driven like an on/off switch... either granny the hell out of it or drive full blast... anything in between and the car ran like crap. Also, Dodge techs could easily scan the ECU and see that boost had been running higher than stock and cause warranty issues.
So... if you raise the boost on the speed3 by taking away computer control... does this cause any part throttle overboost or any lean running issues?
How much boost can you run before the computer start reacting badly? The SRT-4 would start to cut fuel or pull timing at anything above 18 psi, and you would have to start doing things to either 'trick' the ECU, or you'd have to upgrade to one of the Mopar stage kits which would allow more boost.
