im not really up on my bikes but youll have to tak the return into a non pressured part on the oil system. best way i can think of is tap it into the top of your oil can. the turbo needs a constant supply of oil to keep it lubed and dissipate the head, so if you dont run it back into the oil system, youll end up with no oil in the engine, and we dont want that.. on a 1 litre motor, youll have trouble keeping the boost under 9 or 10 psi when revving it up that high mate. the wastegate on the ct9 is just way too small. youll have much better boost control if you weld it up and run an external gate. i honestly think you should consider something a little more capable, have you looked at a KKK24 turbo? they are ten times better than a ct9, and will suit your needs little better.