Boost vs fuel pump volume e85
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TECH Regular
Joined: Dec 2022
Posts: 444
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Boost vs fuel pump volume e85 I have a lq4 in a swap vehicle that I threw a 7875 on running e85 with deka 80s.
With the aem 340lph pump i was running outta fuel over 13psi boost above 5k verified fuel pressure drop with gauge.
I had a 450 so crammed that in the basket. And still running lean with high inj duty cycle up top. Havent put the gauge back on it to see if I'm losing pressure or just out of injector.
Just trying to hear some thoughts from the more experienced. Think I'm outta injector or volume?
What's Average boost to fuel pump volume ratio on E? Like how much pump for "x" amount of boost?
Would like to know same for injectors...
With the aem 340lph pump i was running outta fuel over 13psi boost above 5k verified fuel pressure drop with gauge.
I had a 450 so crammed that in the basket. And still running lean with high inj duty cycle up top. Havent put the gauge back on it to see if I'm losing pressure or just out of injector.
Just trying to hear some thoughts from the more experienced. Think I'm outta injector or volume?
What's Average boost to fuel pump volume ratio on E? Like how much pump for "x" amount of boost?
Would like to know same for injectors...
You need a second pump . One pump will get you to 10 to14 psi on e85 depending on the pump .
add a second pump and turn it on at about 10 psi boost .
deka 80s will go a lot farther than most will believe. I have been 9.01 at 150 mph on them on e85 at 3500 lbs . And It wasn’t out of fuel yet.
add a second pump and turn it on at about 10 psi boost .
deka 80s will go a lot farther than most will believe. I have been 9.01 at 150 mph on them on e85 at 3500 lbs . And It wasn’t out of fuel yet.
Why are you running such high fuel pressure when you've got a boost referenced regulator?? Turn it down to 43 psi and you'll get more life out of your pumps and fuel system in general
Thread Starter
TECH Regular
Joined: Dec 2022
Posts: 444
Likes: 158
Dude this thread is soo old...I have sold that car and built a new one already haha
But to resolve the thread it was out of pump. I added another pump and the thing made a ton of power with plenty of fuel left.
And if you run higher pressure you will get more out of your injector. Lower pressure and you will get more out of your pump
But to resolve the thread it was out of pump. I added another pump and the thing made a ton of power with plenty of fuel left.
And if you run higher pressure you will get more out of your injector. Lower pressure and you will get more out of your pump
Dude this thread is soo old...I have sold that car and built a new one already haha
But to resolve the thread it was out of pump. I added another pump and the thing made a ton of power with plenty of fuel left.
And if you run higher pressure you will get more out of your injector. Lower pressure and you will get more out of your pump
But to resolve the thread it was out of pump. I added another pump and the thing made a ton of power with plenty of fuel left.
And if you run higher pressure you will get more out of your injector. Lower pressure and you will get more out of your pump
