What ELSE can i do for a horsepower gain!!
 

i have an 88 gxl love the car to death, but i feel so limited to what i can do with it. im not looking to port the engine so what else can i do with it. turbo is one of my ideas. i have the RB headers from an FD and a greddy SP2 exhaust from an FD and a K&N intake. how much power is that pushing btw? anywho what else can i do to the engine to help it? would a throttle body spacer help? or any other spacer? :scratch:

This doesn't make much sense. All FDs were twin turbo, so a "header" for one will mount up a turbocharger and thus be no use on your car.

You've covered the basics of making more power on an NA rotary. You can free up some more without going into the engine by tuning it. Whether this is a piggyback like the S-AFC or a full standalone depends on your budget and skill level. The S-AFC will allow you to tune the fuel curve which can result in some pretty good gains if you know what you are doing. A standalone will allow you to control every aspect of the engine but costs at least 5x that of an S-AFC and requires considerable skill.

Throttle body spacers are about as useful as muffler bearings or blinker fluid.

what kind of S-AFC to go with I was thinking the R-tek7 ecu

http://rotaryresponse.com/ebay/13brbexhaust.jpg

they look like this except mine areent all nasty. i had to customize my 02 sensor for it to reach. so now i REALLY dont know what kind of headers they are. this mazda guy told me that they were FD headers.

Could be custom headers for someone who wants to NA their FD...

The S-AFC is made by Apex'I.

RTek is a good choice.