Naw, the T-78 is a POS, and the T-88 is too big w/too slow of a spool. I'm not a big dragger (might as well get an '88 LX 5.0 for about 2k if you want to drag). I want something that can take AutoX, track days, and the street, while still being respectable at the track. Some guys in the big board (
www.rx7club.com) are running 12 with stock engine and turbos (and have timeslips to prove it). The other ones that are interesting are the To4 series . . . throw a big hotside on there and they can make some nice juice down low.
I'm waiting to see how Chucks car at RE does with the GT40R. He had the T51R Kai from HKS in there till it blew. He made 5xx to the wheels, but he didn't get full boost until WAY up in the RPMs.
One thing that is nice about the twins setup (except for the complexity, weight, heat, servicability, maintaince, transition period, etc.) is that you have near instant power, so you are faster in many situations that bigger hp competitors. Just food for thought . . . but i still want to go single with a medium sized turbo that spools quick. There's a joke in the supra community about huge turbos: What does a 400 hp supra and a 900 hp supra have in common? A: They both run the same 1/4 mile times. We hit a point where more power isn't necessarily the best solution . . . hence the smaller turbo while spending more money on "other" endevors.
chris
'93 RX-7 R1
Dyno'd 5/04: 327 RWHP w/stock engine end twins!