My comment on the T51R was in reply to an obvious spool time comment above implying it would only be any good for the drag strip, it's quite capable on the street, it's not of the oldschool mind of "rebuild a giant truck turbo for huge power and no bottom end". I also plan to take it to the track far more than I've ever intended on taking it to the drags.
I know there are a few T51R equipped GTR's in Australia, but I get the feeling the post frankxinyu made he'd like that even less than the big turbo on the Supra! I especially love that QLD midnight purple GTR with the T51R, awesome car.
Personally if I was building an Rb26 I wouldn't go bigger than a T04z on stock capacity because I don't like that much lag, unless it had been stroked to 2.8L, or had a 3.0L bottom end. But hey, other people don't care about the lag, and they can build whatever they like. Same way someone with small twins would probably look at my setup and think it would have too much lag, as they prefer not dealing with any lag at all.
Personally I prefer the tuning done by big name Japanese workshops to a lot of the US ones, as they seem to push out huge dyno and drag cars, but not so much in the way of track cars, however the ones that do come out are awesome. A lot of the big name US Supra's have turbo's 2-3time the size of mine.
I never said the RB26 was bad at all did I? In fact I find the engines response and delivery quite refined, especially when compared to other Nissan engines, they just feel so damn smooth. Nissan really did put huge effort into the Rb26 to do exactly what it does the best that they could.
Toyota on the other hand over-engineered the 2JZ and 1JZ to hell, I'm personally sure they could of gotten better response and delivery from the factory by working harder with the production goals of the car, but I'm also very thankful that they didn't and provided us with engines that can pull such huge numbers compared to factory specs with only bolt on components, a modifyers paradise.
Come to think of it, I think the only "bad" things I've said about GTR's in here are you need to rebuild them earlier in the modifying scope, and they feel like they bog down a bit when taking off in normal driving. Oh and they happen to weigh more than Supra's, which I didn't really bring up in an attack on GTR's, I brought up as an attack on idiots who paint the Supra as a heavy pig without having any idea what they're talking about.
Dan.