Are the EGTs. There is a trade off with everything. I feel that a large single turbo setup with long runners on the tubular manifold will have less ill effects than our type of setup; log style manifold with very short rear runners. I think that there would be increased EGT, increased back pressure & decreased scavenging effect.
~Induetime~ "Lag Less" 500WHP/533WTQ Stock Turbo World Record Holder