Rally cars use small turbos with a wide surge line for on off acceleration. If they were in constant surge they would not last long.
An 80mm turbo is huge if designed right will make 1400 HP. On a inline six it must have a ported compressor housing, the engines are not that big. The advent of the ported housing is what has allowed big compressors on small engines.
Also the ball bearing turbos do not have as good of oscillation support and will rub easier than a normal bushing style, their strong suit is quick spool up.
Everything is a trade off in motor sports.
Harry
Last edited by Turbo-6; 01/11/10 12:41 AM.
