i'm about to buy an 1990 rx-7 non-turbo. What i want to know is it can be turned into a turbo with the existing engine or would a swap have to done?

 

you can turn your n/a to a turbo:

option 1 : buy a turbo engine and in stall it in a turbo

https://www.rx7club.com/forum/showth...;threadid=26647

http://www.rotaryresurrection.com/turboconversion.htm

option 2 : do the custom turbo setup like arron cake

http://www.aaroncake.net/rx-7/naturbo.htm

option 3 : wait an buy Dave's n/a turbo kit(this is the one i will buy)

http://clubfc3s.com/iboard/index.php?act=ST&f=18&t=879&

you also need to read :
https://www.rx7club.com/showthread.p...hreadid=181219

But anywho good luck