I have shared this pearl (?) of wisdom on here before, but it will be well buried now. It seems to be the right time to share it once more.

After much experience with turbos in 2002, and with the implementation of the 450 single in 2003, we considered using a turbo to compensate for the power deficit of the 450. We undertook a simple experiment to determine how turbo location affected overall engine performance. Basically, we found that the critical dimension was the distance between the turbo body and the exhaust port - the further the better. For example, the car performed at its best when we were competing in Bruntingthorpe in the UK, while the turbo was located in a bin in Melbourne, Australia.