JB4 Map 1 Log

[sa90h]

Just got my JB4 and tried out map 1 on my 2020 supra. Throttle seems to be cutting and the car seems to slow down momentarily at around 4500 rpms. Also, it looks like it hit 23.7 psi at some point which is concerning for map 1. My log is below. What do you guys think?

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[i3igpete]

Ignition timing is on the struggle bus, you likely have lots of knock. I'm guessing you're on arizona/cali/nevada 91 octane? Definitely don't try a map 2 or 3 pull.

Do you have any stations near you that have e85?

 

[sa90h]

Ignition timing is on the struggle bus, you likely have lots of knock. I'm guessing you're on arizona/cali/nevada 91 octane? Definitely don't try a map 2 or 3 pull.

Do you have any stations near you that have e85?

Yup. Az 91. I’ve already tried a map 2 pull, felt pretty good. There’s an e85 pump but it’s really e55. You think it’ll cause damage if I continue to use map 1?

 

[ColonelAdama]

Yup. Az 91. I’ve already tried a map 2 pull, felt pretty good. There’s an e85 pump but it’s really e55. You think it’ll cause damage if I continue to use map 1?

Looks like timing is non-existent, so yeah stick with Map 1 until you want to blend ethanol.

Recommend putting in 3 gal ethanol to a full tank gas, or use the 1:3 ratio. Then you can try Map 2.

Also please upload to datazap and post the link here next time.

Map 1 won't cause damage, but without ign timing, its probably hardly faster than stock.

 

[sa90h]

Looks like timing is non-existent, so yeah stick with Map 1 until you want to blend ethanol.

Recommend putting in 3 gal ethanol to a full tank gas, or use the 1:3 ratio. Then you can try Map 2.

Also please upload to datazap and post the link here next time.

Map 1 won't cause damage, but without ign timing, its probably hardly faster than stock.

Thanks for the input. I think I’ll try map 4 with e30 soon and see how that runs. Do you think the timing would be better with some e in it?

 

[ColonelAdama]

Thanks for the input. I think I’ll try map 4 with e30 soon and see how that runs. Do you think the timing would be better with some e in it?

absolutely. Anything outside of Map 1 will need ethanol, and frankly, your Map 1 should use it too.

I recommend putting 3 gal ethanol in, and re-logging Map 1 before proceeding.

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