Re: turboing a D15?
 

The only thing you will need is a bigger fuel pump and some check valves. You can find some inline fuel pumps for around $100 online.You will need the bigger pump to hold the high pressure that the FMU will create under boost. For the check valves, go to a store that sells pet supplies. get 2 T fittings for fish tank air line. then buy 2 one way check valves. Put the 2 Ts in the line that goes from the TB to the MAP sensor. Then attach the 2 one way valves to the 2 Ts so when the motor is boosting it blows the air out of the one way vaves but when you are in vacuum they close.

Is this the "best" way to go? No, but it will work fine if you stay under 10 psi.