
2 mods d FD twin turbos engine is not new now. It all depends how high d horse power u required!

480hp o'ready can be produced from d original 2 turbo set up in 1 of d Amercian RX7 event many years ago. n tis made up our mind 2 upgraded 1 0f our member FD by maintaining d stock turbo with large impeller only, n of cause some other effective tricky parts 2 fine-tuned engine 2 operate good driveability n response 4 almost all rounded rpm range everyday. With tis mods, v had outran quite a number of other big single turbo RX7s at highway from standing start till top speed.

Unless u r willing 2 go 4 extreme tuning stage - e.g. drag racing, u can start throwing all those Mazda heavily invested 4 all FD, 2 u are so-call bullshit solenoids, check valves, actuators etc. then 2 replace a big single turbo set-up 4 tis 13B rotary should be a good match 4 very high power output 2 win races.