A lot of the guys actually end up ditching the twins. The stock system is a sequential system, which tends to bring a lot of unneeded complexity. It's been proven that a properly sized single will have just as good, if not better response than the twins.well god knows i would love a 20b swap, i mean who wouldnt. but its just not in the cards.
the goal here really inst power, just something extra for people to look at and be like wtf kind of motor is that? is that stock, ya know?
i think i will be happy with the stock numbers for now, but i am one of thsoe people that cant leave well enough alone ya know? so it will probably be upgraded eventually. i just want to get it in and running first.
i am leaning towards the 13bt out of the fc turbo II, but i would really loveto go TT. any suggestions on that if it will work or what i would have to do with a turbo mani or if it would work with the rhd conversion or not?
As for turbo mani's, there really isn't too much out there. HKS makes a cast piece that is bolt-in and also a tubular manifold with a T4 flange. A-Spec Tuning makes some good (but pricey!) complete turbo kits for the RX-7. Aside from that, you're on your own.
If you really want to do something different, why not stay N/A and going with a bridgeport or peripheral port? Take a 4-port turbo motor, remove all the turbo stuff (and everything else), peripheral port and ITB's. Not only will you have a very minimalist engine bay, but you'll have pretty much the sweetest sound on earth coming from your engine bay.