[cmrobert]

I just installed my JB4 and fuel wires on my car today and was wondering if it looked okay for me to jump up to map 2. I tried to get some logs in before the rain came down heavy but they may not be the best. Any advice is appreciated!

[Lonmon]

Originally Posted by cmrobert

I just installed my JB4 and fuel wires on my car today and was wondering if it looked okay for me to jump up to map 2. I tried to get some logs in before the rain came down heavy but they may not be the best. Any advice is appreciated!

Looks good to me, timing, afr, and boost all look good for 91 octane. You are reaching a max of about 15 psi. You may be able to get another psi on 91 octane but I would not push it past 16 psi on 91.

[cmrobert]

Awesome, thanks. I’ll do some logs on map 2 and post them just to be sure. In terms of boosting octane, is it safe to regularly mix a small amount of E85 in with 91 to make E20-25 with no supporting mods besides the JB4?

[Lonmon]

Yes, mixing about 4 gals and the rest 91 should be good. Make sure to run it down as close to empty as possible as you will start to stack ethanol if you don't get the mix right. Its not a bad idea to buy an ethanol tester (very cheap and easy) to at least know the content of the e85 you are using. Most can be between e60-e85 depending on the station and time of year (winter mix has less ethanol).

[cmrobert]

I ordered an ethanol tester so I can test the E85 near me before I mix it into my 91. I also attached the logs for map 2 just to double check its safe at the current octane

[Terry @ BMS]

Originally Posted by cmrobert

I ordered an ethanol tester so I can test the E85 near me before I mix it into my 91. I also attached the logs for map 2 just to double check its safe at the current octane

Looks fine to me!