I'm currently utilizing a T04B V-trim turbo in my '81 GSL-SE. I'm planning to move up the horsepower but I need some expert advices. I'm looking for a turbo and injector combo that would put out 430+ on 91 to 650+ rwhp on C16. All mentioned rwhp numbers must not pass 11.5 a/f ratio. NO NOS please! I know few of you already been there and done it so I would like you guys share some 411 if you don't mind. My car is majority a street driven car only (weekends only).

My current mods (this car was built 13 years ago):
TII 13B-T, Street Port, Stock 2mm apex seals
Electromotive TEC-I EMS pafz
Performance Technique TO4B V-trim turbo not sure a/r
4 X 750cc injectors (GSL-SE) Bosch fuel pump -6 lines
HKS T4 Manifold
HKS Racing Wastegate
HKS Racing BOV
HKS Racing IC (THICK!)
HKS EGT & Boost gauge & Turbo Timer
3" Custom exhaust with HKS Turbo muffler and resonator from a Supra
Tuned by late Fred Miranda

 

hmmm it looks like u have a pretty nice set up. so u probably have a ggod grasp on things. first off i know it wasnt part of your question but if u havent had a rebuild in a while u might want to get one just for piece of mind. or at least a really good tune up i.e. new wires and plugs compression test the works. and also i see your running an old tec-I. u might want to think about upgrading that thing to a tec3 or a tec3r. better ems all around. or a nice haltech unit would prolly benefit u alot. as far as injector sizing goes 2 x 750cc and 2 x 1300cc injectors would do u fine imo. maybe toss another fuel pump in there to just for ***** and giggles.

now on to turbo selection. **** right now the skys the limit on this one. like u stated i would go with something proven. im not just going to outright tell u which u should get because im a type A person. i dont really know what u are but in a nutshell this is what u should be concidering: u want a turbocharger(comp wheel trim&a/r housing) that will flow at least 70 lbs/min of airflow. preferably 72-75 lbs/min range. if u can read compressor maps thats the easy part. now onto the most iportant part of picking a turbo for a rotary. the turbine section, the "hot side". this is were a lot of people shoot themselves in the foot. imo a good method to use is to read the turbine map of a turbo. itll tell u boat loads of info. how much air itll move, efficiency, etc. also figuring out backpressure to boost ratios will help in choosing the right compnents after you've picked your snail. ok im sleepy i hope i didnt bore u to death

 

I wrote a web page that might help with the injectors:
http://maxcooper.com/rx7/how-to/fuel_system/calcs.html

-Max

 

For those kind of numbers, I think you're gonna need a BIIIG Turbo. T78, T88, GT45, etc..

By the way, I love turbo first gens, - can you post some pics?