What is the differance between 85 turbos and 86-87 turbos?

[JC93Z]

Just like title says.....

 

[FJM568]

84/5 turbo's flow about 390 cfm and the compressor outlet is different and the inlet has the studs clocked in a different position...the 86/7 turbo's flow around 480cfm...

The 86/7 turbo's are also a little bit more efficient...

 

[GrndNatnl]

http://www.gnttype.org/techarea/pictureguides/turboguide/8485vs8687.html

 

[JC93Z]

Thanks guys!!