I was wondering if there is a difference between the rotors on a 91 rx7 turbo and a 91 rx7 na? also if there is a difference between the front(side) housing, intermidiate housing and rear side housing on the turbo and na. thanks alot

 

yeah theres a diff in compression.. the turbos have lower numbers than the NA.. the S5 NA has the highest comp numbers at 9.5:1... i believe thats the right #?

Search man, this has been covered before i promise you...

 

S5 NAs are 9.7:1
S5 Turbos are 9.0:1

the front and rear irons are deffinitly different (turbos are 4 port, NAs are 6 port), I'm not sure about the center iron though