The trouble with most OEM systems is they read only 1 bar. turbo's don't hane linial boost.. They can have boost any where.. In most cases ignition timing is close to 10* too advanced..
A road tune with wide band gives you real good road manners if your runing a wild cam or tune.. Which is difficult to tune out on dyno..
We here in Aussie have Boost refferenced ECU's that read up to 3 bar [more with options] The budget ECU's start at $1k to $2500 for fairly top quality..
EMS Product 2
MicroTech EFI :: ECUs
Haltech Engine Management Systems
There's Motec, Autronic, Fast, etc but they are $3k plus..
We have used both EMS and Haltech. Both have U.S dist...