Originally Posted by
TeamCarnage
Another q. I'm gonna give up my 30% nitro for 20%. With the T9, do I add a shim? Should I follow the in-car engine break-in on the RB site? I was always a heat cycle guy and have had good luck.
The T9 is shimmed for 16%. This past weekend with my R3 which also comes shimmed for 16% but I added .2 shim and ran 25% and it was very fast, barely made 5 minutes though with a 2604 pipe.
I used the heat cycle method on both my R3 and R3RC and they've been fine.