Turbo....

RustyRatRod said

I've done a TON and I mean a TON of reading on turbos. From what I've gathered, for best street acceleration, it's actually best to choose a turbo that's just a tic smaller than you need. Similar to how some of the diesel boys do it. The smaller turbo spins up quicker. But too small and the power benefits fall off drastically.

Click to expand...

There is a very fine line actually. Too large and it won’t spool soon enough and it will lag. Too small and backpressure will will be too high and the thing won’t make any power. The correct way to do it is to read and understand a compressor map and size the turbo for a specific engine. At maximum airflow requirement the compressor should be in the 70-90% efficiency zone on the map. Which will keep the turbo out of surge and keep backpressure at reasonable levels.