Originally Posted by Thrush
if you had one very small turbo (that would spool up virtually from idle but run out of puff say at 3k rpm, and it blew directly into a second turbo, a much larger one that wouldn't normally come on boost till say 4k.... So you would use the exhaust gasses to spool up the tiny turbo, and that tiny turbo is what would spool up the big turbo and thre big turbo feeds directly into the throttle butterfy.................???
Its called sequential turbos mate, and is standard on Supra Twin Turbos, Rx7s etc.
Its also the first thing that gets binned once the mods get serious as far more complicated that what makes it worthwhile as doesnt make the car any quicker, smoother yea, bit more lowdown power yea, quicker, no unless you cant change gear no.