Hey brian, tied 1 all!
The rotors are S4 TII's...went with the whole assembly (obviously...) as when I spec'd the remaining rotor, and the replacement (S5 TII's) I found 2 of three slots on each that were just not quite up to par.
what's the compression on S4 N/A's again? 8.7?
OH forgot to mention.....
In this engine, there is one housing with jacket mods, and one without. This should provide a decent back to back to assess the effectiveness of the mod without the costly embedded temp probes that mazda used in the studies
The rear is modded, front is stock.
Only other relavent cooling mod on this engine that was present before and still now is the Mazmart Remedy waterpump + pineapple racing idler pulley.....