so some of you know. ive recently changed my turbo and manifold over.
old
-89 square type manifold, TDo5HL-14b
new
90+ tube type ported, T3/4 ported.
the difference is considerable. (not taking into consideration the performance gains from the larger T3 turbo.)
the low rpm gains have been significant. so efficency has increased dramatically. im starting to spool positive pressure almost 1500rpm earlier.
so can only recommend alex's work.
@jamesinc...says me ;P hehehehehehehehehehehhe.