Well at first i tried to convince Jocke to use T3's as well...
Good part is that T3 is a turbocharger used on early Saab 9000's, and here in sweden you could pick up two of them for peanuts at every junkyard...and they are oilcooled as well.
But on the other hand there are some issues:
First, let's ask ourselfs why dual turbos? If we forget "coolnes factor" for a moment, people use dual setup to minimize turbo-lag. (two small turbos spin up faster than single large one)
Unfortunately, Garrett T3's, despite being dirt cheap, realiable and better dezigned than those awful 3DLZ's are a tad too big for 3.0-liter engine. I had one of those on my 2-liter SAAB (with A/R of 0.47), and despite having "headers" that were very short(10-15 cm at most), boost started to build up around 2700 RPM.
So 3L 930 with a pair of T3's would probably be pretty laggy from bottom. But as somebody mentioned, T3's have built in wastegates, rendering those external lumps useless and saving weight...
So answer is (in my opinion):
Yeah, it's a matter of taste. Properly sized and executed, dual turbos reduce lag (993 and 996 use dual turbos). Cheapskate approach with T3's won't reduce lag but will be able to return some decent power (approx. 400 HP with A/R 0.47 or ~500 HP with A/R 0.60) ... beeing cool to boot.
If you have time and tools, why not?
