it is not considered a big t, their site recommends 18%+ oil and 5-25% nitro, most people getting mid 8Ks on 18x8s, and i see on rcfaq.com that alot of people run the apc 17x8 at 9200 rpm or so on 15%, just wondering if the extra rpm of the 17x8 will help with the vertical over the 8Ks rpm of the 18x8