Some e85 boost ?s
Manufacturers like to toss out high flow numbers to get your attention, like "this pump supports 2000hp". Yes it does, at 8psi for a carb setup in the lab, but what does it flow at 75psi in the car when voltage is down to 13V? How many vendors/manufacturers publish flow charts for their pumps?
Sorry, one of my pet peeves. Carry on.
^^^
What those guys said
My tuner said he's had pretty good luck at the base pressure its at with setups similar to mine
Dual 340s and 84lb injectors, not so much pressure that the pumps start to fall off,but enough to keep up with the smallish injectors
I think there rated at 43psi so they're just a little bigger than the popular Siemens 80s
I probably won't turn mine up much more than it is, pretty happy with the fuel system for not having spent too much
What those guys said
My tuner said he's had pretty good luck at the base pressure its at with setups similar to mine
Dual 340s and 84lb injectors, not so much pressure that the pumps start to fall off,but enough to keep up with the smallish injectors
I think there rated at 43psi so they're just a little bigger than the popular Siemens 80s
I probably won't turn mine up much more than it is, pretty happy with the fuel system for not having spent too much
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Yeah good point 2JZ, they are rated at 4 bar. And I was running triple walbro 255s for my fueling. I used to be on just twin 255s, but I was getting really worried about running out of pump.
I am having trouble understanding the question I guess. I think what you are meaning to say is, if you target the 11.5 (gas scale) afr for your e85 setup, you will also have e85's stoich ratio of 9.77 programmed in you ECU also, so yes, when you get into WOT higher boost areas, you will see that the duty cycle has gone up by quite a bit. I also like to keep an eye on the fuel pressure at least at first, so you can see if you are running out of pump.
I am having trouble understanding the question I guess. I think what you are meaning to say is, if you target the 11.5 (gas scale) afr for your e85 setup, you will also have e85's stoich ratio of 9.77 programmed in you ECU also, so yes, when you get into WOT higher boost areas, you will see that the duty cycle has gone up by quite a bit. I also like to keep an eye on the fuel pressure at least at first, so you can see if you are running out of pump.
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Yeah good point 2JZ, they are rated at 4 bar. And I was running triple walbro 255s for my fueling. I used to be on just twin 255s, but I was getting really worried about running out of pump.
I am having trouble understanding the question I guess. I think what you are meaning to say is, if you target the 11.5 (gas scale) afr for your e85 setup, you will also have e85's stoich ratio of 9.77 programmed in you ECU also, so yes, when you get into WOT higher boost areas, you will see that the duty cycle has gone up by quite a bit. I also like to keep an eye on the fuel pressure at least at first, so you can see if you are running out of pump.
I am having trouble understanding the question I guess. I think what you are meaning to say is, if you target the 11.5 (gas scale) afr for your e85 setup, you will also have e85's stoich ratio of 9.77 programmed in you ECU also, so yes, when you get into WOT higher boost areas, you will see that the duty cycle has gone up by quite a bit. I also like to keep an eye on the fuel pressure at least at first, so you can see if you are running out of pump.
But wouldn't i actually be getting 6.5 under boost conditions If i using an 11.5 afr scale?
Should I set base around 75? Keep in mind im running a single 044. If my DC gets outta control ill add another in parallel.
I have SD 80 pounders in a 5.3 with a Holley 12-1800, Billet S366, LJMS custom cam. I have more than enough fuel at 16.5 psi. As a matter of fact, I keep trimming above 5500 rpm. While it is "only" a 66mm turbo, it is a Forced Inductions V2 wheel and it is rated for 1k. Car made 540 with the same turbo with a cast wheel at 11 psi. I don't think you need 160 pound injectors for a 5.3 on corn, unless it is a max effort car with a large turbo.
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Verdad Gallardo Also you absolutely will not have enough fuel flow to raise your base pressure. You need more pump.
Whats you injector/pump/fuel line setup? I remember you saying your running E85. Im moving at the end of the year and by the time my car is done, Ill be near an E85 station.
Before cranking it up you should log your car to see what sort of DC you are using on lower boost. FWIW if you have an electronic fuel pressure gauge you could splice that into an hptuners pro box to log for any drops as you push more boost. I run 2000cc injectors and on 16psi I'm seeing about 70% dc and steady pressure on dual 340 pumps. I plan on pushing 22psi later this fall so i'll be watching my Lambda, fuel pressure and injector dc as I work my way up there.
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Well, i ran outta pump like you said i would. I tried some e85 and watched DC under wot and hit 100% almost instantly. So, gotta redo fuel system. since im a non oe efi car. (70 Chevelle) Im gonna add another 044 to my sumped tank or do a surge tank setup.
Like this to 2 044s......
Or this......
Last edited by LT1PWRD; Jun 12, 2015 at 09:49 AM.
Im in the middle of doing mine as well. two 044s and a 450 intank.
http://www.proflow.com.au/catalog/500417
That's the setup im looking at for the 044s.
http://www.proflow.com.au/catalog/500417
That's the setup im looking at for the 044s.
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Im in the middle of doing mine as well. two 044s and a 450 intank.
http://www.proflow.com.au/catalog/500417
That's the setup im looking at for the 044s.
http://www.proflow.com.au/catalog/500417
That's the setup im looking at for the 044s.
