I have a twin turbo rotary 13bre i want to throw a single turbo in it can anyone give me some advise on what size to put on my motor

 

What is the purpose of the car? For example, will it be a daily driver, and/or will it drag race, road race, or autocross?

Also, I am a bit concerned that you are asking a very basic question for an engine that is a royal pain in the rear to install and run in the FC RX-7.

 

gt3588 ( 3540) is the perfect compliment for most street applications. Find and by the adaptor engine mounts and then go for gold

 

It will be for a weekend car and Drift

 

Wish I could bring some turbo ideas to this table but my FD has the twins on her but no longer sequential. You're going to get a lot more ideas in the FD forum I believe.

 

A GT35R or T62 ball bearing turbo would work pretty well for that. We also have a Single Turbo subforum on this site:
https://www.rx7club.com/forumdisplay...sprune=-1&f=23

 

thanks man