E30 vs 100 octane JB4

[romanLegion9574]

Isn't map 5 what's been killing the Supras posted on FB?

Correct me if I'm wrong, but wasn't that map 3 overboosting on pump gas?

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[zrk]

Correct me if I'm wrong, but wasn't that map 3 overboosting on pump gas?

you're right. I personally wouldn't run map 3.

 

[felcrum]

you're right. I personally wouldn't run map 3.

On pump gas, right?

 

[romanLegion9574]

On pump gas, right?

Yes. There's a bunch of threads recommending you to use map 1 or 2 to minimize risk. Or reach out to Jesse DaBears (hope I spelled that correctly) for a custom map.

 

[FuzzyRev]

Nobody's mixing extra ethanol with their gasoline on a 100% stock fuel system, right? I'm referring to not having any kind of Flex-Fuel kit, and just adding corn-juice as you feel like it.

I just picked up a JB4 and will be installing it in the next few days. I'm finding that I have quite a few questions about it, and no answers in the installation guide.

 

[zrk]

Nobody's mixing extra ethanol with their gasoline on a 100% stock fuel system, right? I'm referring to not having any kind of Flex-Fuel kit, and just adding corn-juice as you feel like it.

I just picked up a JB4 and will be installing it in the next few days. I'm finding that I have quite a few questions about it, and no answers in the installation guide.

Yeah - we literally all are. I run E40-E50, but I balance trims with meth. You can easily run E30 with JB4 and no fuel system upgrades. No flex fuel kit here. Just measure out the fuel, and away we go. Trims, AFR, everything is very healthy.

 

[Thraxbert]

Nobody's mixing extra ethanol with their gasoline on a 100% stock fuel system, right? I'm referring to not having any kind of Flex-Fuel kit, and just adding corn-juice as you feel like it.

I just picked up a JB4 and will be installing it in the next few days. I'm finding that I have quite a few questions about it, and no answers in the installation guide.

Stock fuel system + JB4 = no problem at E30.

Stock fuel system + DME tune = no problems with E50.

But bigger turbo with E50, you're looking at LPFP/HPFP upgrades. This is my best understanding.

 

[Got_M]

Yeah - we literally all are. I run E40-E50, but I balance trims with meth. You can easily run E30 with JB4 and no fuel system upgrades. No flex fuel kit here. Just measure out the fuel, and away we go. Trims, AFR, everything is very healthy.

Bingo! This is what I plan to do. I will report back soon!

 

[ColonelAdama]

Bingo! This is what I plan to do. I will report back soon!

Start low (like 2 gal E85) - every car is different. And read my thread

 

[Got_M]

Start low (like 2 gal E85) - every car is different. And read my thread

Just read it. Very nice write up! I do have a 93 custom map 6 from Jesse.... Wanted to try Map 5 on E to see if I could squeeze out some better times. Thoughts?

 

[ColonelAdama]

Just read it. Very nice write up! I do have a 93 custom map 6 from Jesse.... Wanted to try Map 5 on E to see if I could squeeze out some better times. Thoughts?

Yup, should be able to get more power on E. Continuing conversation in PMs.

 

[Awales74]

Nobody's mixing extra ethanol with their gasoline on a 100% stock fuel system, right? I'm referring to not having any kind of Flex-Fuel kit, and just adding corn-juice as you feel like it.

With JB4, the flex fuel is a bit of a misnomer. It simply tells you the % of e (well, really the % of "not gas") running through the system. The JB4 isn't scaling up or down the tune like a real tuning solution would.

Myself, I have 1 gas station that I purchase my fuel and it's the fuel I ran when getting my custom tune. I run the tank near empty and fuel up the same ratio. It works for me.

 

[ColonelAdama]

Nobody's mixing extra ethanol with their gasoline on a 100% stock fuel system, right? I'm referring to not having any kind of Flex-Fuel kit, and just adding corn-juice as you feel like it.

I just picked up a JB4 and will be installing it in the next few days. I'm finding that I have quite a few questions about it, and no answers in the installation guide.

With JB4, the flex fuel is a bit of a misnomer. It simply tells you the % of e (well, really the % of "not gas") running through the system. The JB4 isn't scaling up or down the tune like a real tuning solution would.

Myself, I have 1 gas station that I purchase my fuel and it's the fuel I ran when getting my custom tune. I run the tank near empty and fuel up the same ratio. It works for me.

Yes, people do mix extra ethanol in, but should not exceed E30 in most occasions with stock fuel map (including any JB4 map).

Agreed that JB4 is not flex fuel at all. It just integrates with the E analyzer so you can make sure you have enough ethanol/octane to run an aggressive map that was tuned for a certain E level. No flex maps, everything is manual.

 

[FuzzyRev]

@Awales74 @ColonelAdama

Guys, scroll up. I asked that question two and a half years ago

 

[ColonelAdama]

@Awales74 @ColonelAdama

Guys, scroll up. I asked that question two and a half years ago

Lmaoo I saw right after hitting reply. I was like, wait, I remember the A91 wreck

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