I have found a guy that claims to be selling two rotors out of a running '91 NA.

The price is good but the photo he sent me has me concerned.



The one on the left looks good and correct (compared to what I have pulled from my '91 core motor). The one on the right in the photo appears to have damage OR is out of a different model. The "bowl" on the face of the rotor appears to be wider at the top than at the bottom.



Is it just a bad photo?

Is this what a turbo rotor looks like?

Is it a S5 n/a rotor?



Thanks.

 

Righthand one looks like an earlier n/a rotor. Try weighing them, they should be within 50 grams of each other if they are the same model and weight code (A thru E)

89-91 rotors have a uniform milled surface over the entire face of the rotor including the bathtub.



Gary

 

i concur, right one looks like a S4.

 

the s4 rotors are easy to spot they have cast combustion recesses like the one on the right and 2mm apex grooves. the s5+ rotors all have machined cumbustion recesses. the difference between em is the size of the depression (s5+) the 9.7's will have a shallower one



mike