I have a drag racing beetle fitted with a 93 legacy turbo motor. It has a TD05 turbo fitted and a W6 ecu off a WRX. We took it to a rolling road the other day and found it makes good, smooth power (217bhp at 5850 at the wheels).

The only problem is that at low revs its overfuelling quite badly and after every drag racing meeting i have to change the oil because its so diluted.

Any ideas why and how i can sort this out and still keep the power?

 

Get a proper remap. Maybe with a stand alone ECU such as the Simtek.