Stinger fuel pressure drop, possible solution?

[Nigel Carson]

like many others, I’m battle the fuel pressure drop issue, I know there are some solutions in the works but nothing for sure. I noticed on some logs I had just run that my fuel pressure was only dropping during shifts and would steadily climb back if the transition back into boost was smooth enough at that rpm range. Meaning NOT going from a 4.5psi request at 6200rpm to a 6.0psi at 4500. But this makes the car feel much slower. Is there any way to just wire the pump to a toggle to run at 100%? It can be used when driving the car harder. Just wondering if anyone has attempted this yet. If not I think I’d be willing to give it a shot honestly.

 

[Terry@BMS]

Add a wire between the low pressure sensor in the back and the JB4 to monitor your fuel pressure and determine if it's a low pressure issue.

 

[Tonkabob]

Add a wire between the low pressure sensor in the back and the JB4 to monitor your fuel pressure and determine if it's a low pressure issue.

What scenarios have you seen fueling issues? Sounds like the hybrid turbo which is not a big surprise. Is Get Stungs 5th gear cut fueling? I haven't had issues but haven't run anything higher than e10.

 

[Nigel Carson]

What is it basing fuel pressure off of without that signal reference(how I’m currently logging)? Since there is fuel pressure when logging..Also, I will note I’ve been playing with boost settings on my e20-e30 mix on map 6 and i can’t go much further above map 2 parameters, about .5 psi actually until I get the fuel pressure drop. Threw some 110 in the tank and fuel pressure is 11 across the board even at map 5, I haven’t really felt spark blow out in this car so I haven’t ruled that out either but Im leaning towards fuel pressure. Ever really seen people have fuel pressure issues like this on map 2 with e20-e30(I’ve tried everything in between)

 

[Terry@BMS]

What is it basing fuel pressure off of without that signal reference(how I’m currently logging)? Since there is fuel pressure when logging..Also, I will note I’ve been playing with boost settings on my e20-e30 mix on map 6 and i can’t go much further above map 2 parameters, about .5 psi actually until I get the fuel pressure drop. Threw some 110 in the tank and fuel pressure is 11 across the board even at map 5, I haven’t really felt spark blow out in this car so I haven’t ruled that out either but Im leaning towards fuel pressure. Ever really seen people have fuel pressure issues like this on map 2 with e20-e30(I’ve tried everything in between)

That's high fuel pressure. We know that drops under higher demand levels with E85 mixtures. What we don't know is if it's preceded by a low fuel pressure drop.

 

[Nigel Carson]

Gotcha gotcha, okay, could I send you a message on where to hook it up on the jb4?

 

[Terry@BMS]

It's sort of a PITA. You have to attach a wire to the fuel pressure sensor in the back by the fuel pump assembly using a posi-tap and then run that up to the JB4 in to spot 16.

 

[Nigel Carson]

alright I will take a look at it Monday and see what I can get done.

It's sort of a PITA. You have to attach a wire to the fuel pressure sensor in the back by the fuel pump assembly using a posi-tap and then run that up to the JB4 in to spot 16.

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[Nigel Carson]

Do you think fuel control wires will HELP with the fuel pressure drop issue since it’s a leaner AFR?

It's sort of a PITA. You have to attach a wire to the fuel pressure sensor in the back by the fuel pump assembly using a posi-tap and then run that up to the JB4 in to spot 16.

 

[Adamdan]

Do you think fuel control wires will HELP with the fuel pressure drop issue since it’s a leaner AFR?

Yes they will for sure. I think that’s why your hitting low fuel pressure on map 2. I don’t think it’s recommended to run over map 2 with out the fuel wires.

 

[Terry@BMS]

Do you think fuel control wires will HELP with the fuel pressure drop issue since it’s a leaner AFR?

Yes of course, but you already have those right?