stangcb

I have a 93 rx7 auto and need a list of parts to go form twin turbo to single
and what size turbo would be good for all around Performance???

RotaryBred

all around performance for the street i'm assuming???

this setup will get you the best performance for the money and ease of install:

rx7store.net sells a GT35R kit that has the majority of what you need. you will need to upgrade your ECU and i'd suggest upgrading your ignition as well.

for the ECU i'd suggest going with a power FC since it is very user friendly and for the ignition i'd go with an HKS Twin Power. They are both very simple to install since they plug right into the factory harnesses.

Fuel pump: there are a few options out there. I have 2 walbro 255 lph pumps in my tank. you will be fine with one and it easily fits the factory hanger. the pumps are around only $90 a piece so its a bargain

upgrade at least your secondary injectors to 1000cc, you will also need a new fuel rail for this. rx7store.net also sells a rail (and injectors) that can bolt right up with the stock primary rail. if you want to upgrade in the future, just replace both the primary and secondaries at the same time. there are a few complete fuel systems out there, some with and without injectors. check out CJ Motorsports for the system i have. Looks awesome and is of the best quality.

now for the odds and ends:

pulley set (for air pump removal) there are many out there just look around

block off plate kit for emmisions delete

new plugs

new wires

boost gauge (if you don't have one yet)

boost controller (if you don't have one yet)

did i miss anything??

i think thats it