Here are the methods of upgrading the B6 turbo engine to 210hp by my tuner in 1988:
- Replace to 70mm. Exhaust pipes system started from turbine outlet till tail.
- Run short straight hose from airflow meter with hi-flow air filter to turbo air intake.
- Replace heavy-duty clutch set to withstand extra power & torque.
- Install fast boost controller - PS Digital Turbo Booster boosted up to 1.55kg/cm.
- Remove Std. Boost switch to allow higher boost pressure.
- Install PS Fuel Control Enricher for correct fuel/air mix.
- Install PS Fuel Flow Stabilizer for sufficient fuel deliver to rail.
- Stage 1 cylinder head modification.
Mr. Allan or Mr.C F LO [03-56374233] can assist for above specs. modification.