So I tuned my buddies rx7 the other day and it had been running fine. The other night, he engaged the 2 step, and he said the motor let go. He says it sounds like a rod let go. His mods on the 5.3 are, 228r from tsp, arp head studs with ls9 head gaskets, bw turbo (cant remember the size), e boost 2, msd 2 step, and e85 for fuel on 15psi . Why would a motor let go while on 2step?
trans shift point 3.hpt
2 step pull.hpl