Since I only have a stock turbo now, I haven't had to worry about spool up. I am considering a 64 or 66 turbo and a set of 90hp injectors, but I do tow with this truck and need to keep good low rpm spool and power. Ultimately I am chasing the 650hp area, so I need some good airflow.

What I am wondering is from those that have tuned a larger single with EFI, how do they spool? Can you tow with them and keep some low end power? I know that a larger single is not an ideal towing turbo, but I figured with how we can control timing and duration so well that it is doable?

Thanks!