After going thru some diagnostic chores, it was finally time to take the 14 back to Koji for some tuning. Hopefully, with the new cat and cleaned injectors, we could do a full boost tune without knocking.

Previously, we were only able to tune for 13-14 psi before it would start knocking.

Luckily, it was fixed, and Koji was able to tune to about 314hp at 17.5 psi of boost. So, with these Tomei 258 cams, there was an improvement of about 33hp. Sweet…