[djair1904]

Hi, so I’m new to the jb4 world and I’m running
MST intake
Muffler delete
91 pump

Owner of trucane told me map 1 or 2 is okay. But then I see people saying map 1 only. LMK.

[Leem40i]

You're going to be between 1 or 2 depending on your logs. 91 octane is your hold back. Run map 1 and create a log. Post that log in the JB4 forum and ask for a review. If they give you the OK you can try 2 with the same process.

[djair1904]

Ik! They don’t sell 93 in Cali. It’s dead

[biz77]

And ACN 91-octane is terrible. I'll be surprised if you get clean logs on MAP 1 running straight 91 octane. I run 92-octane here in Washington at over 2,000' above sea level and MAP 2 had too many corrections for me. I'm currently running ~e20 on a custom MAP 6 and it's running pretty strong. If you have access to E85, I'd suggest using some.