Hello im am new to this site, I have a 1990 GTU limited import turbo II, it has an HKS intake , Fijitsu twin exhaust homemade decat and a knightsport chip and was wondering what to do next, will a boost controller and FCD cause reliability problems and are fuel SAFC a good option.

 

if u have chip, u should not have need for FCD and S-AFC
if u want more power, u should get standalone EMS, bigger turbo, bigger fuel pump, bigger injectors, gauges and stuff

of if it does have enought power now, take a look at suspension upgrades

 

The chip installed only takes the rev limiter off and haves slightly more aggressive fuel