TurboJunky
Fire the Federal Gov't
- Joined
- Nov 5, 2002
- Messages
- 5,104
I looked into this when I owned my TTA. Voltage tests have been done on stock fuel pumps and they found that due to small gauge wiring voltage is marginal at best, especially at lower RPMs. I don't have the specific numbers but from what I read it was problematic. Basically a "hot wire" is running a much heavier duty wire directly to the fuel pump to ensure a higher, more consistant voltage. This results in more consistant fuel delivery and pressure to your regulator = better performance.