areomotive 340 pump install with relay
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Joined: Jul 2006
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From: Calgary, Alberta
I wish..... I have a MY07 with AEM pump on stock wiring and I'm having major issues......
I'm about to rewire my pump and hopefully that fixes things.....
Hearing about your car makes me start to think that my issues are all pump related and not the wiring.
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From: Calgary, Alberta
if your driving on the highway in the heat I wouldn't go much below a 1/2 tank or if you're driving it hard. in the cooler weather you can get away with 1/4 tank but you shouldn't go much below that and I recommend an adjustable fpr so you aren't working the system harder than needed. that's the reason you have big injectors and large fuel pump we turned the fuel down to 20psi and the car still ran good I just bumped it up to near stock just because. remember a pump has more volume at lower pressure so once you get up to 65psi volume starts to fall like a rock. does that make sense? I think this is why my walbro got noisy low voltage high pressure low volume. I was maxing out the duration on the old 650cc injectors and it was all due to inadequate fuel volume lowering the pressure increased the volume and got my injector duration. down now with the 1000cc injectors I am at 45% duty cycle at 360whp so lots of head room 
That's a bit too technical for me. All I know is that when I looked at my logs, I was running 95% duty cycle with ID1000's and am 320 pump. This is with about 10psi on a sos 1200.
My duty cycle shouldn't be that high should it. Judging by your 45% duty cycle, I'm guessing not.
I'm guessing that my pump isn't flowing nearly as much fuel as it should be.
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From: dfw
right so with 95% duty cycle you don't have the volume of fuel you need. if you can get a regulator and retune the fuel map with idle fuel pressure around 35psi. see where you are after that these pumps don't like high fuel pressure. if you want high pressure the walbro will hold up better as it runs metal gerotor gears the aem, fb and areomotive run the plastic sun gears which run quiet and move lots of fuel at lower pressures but as the pressure goes up so does the heat then your pump hogs down on the voltage flow falls off and everything goes sideways. I am running my novi1000 at 13psi 360whp 240tq on a dyno dynamics I think my max pressure was just over 50psi if I remember. right before I upped the boost and went standalone I had the comptech rrfpr which runs 85-90psi at redline. after I went through two walbros I tried the fd290 pump but it wouldn't push enough pressure I would hit 70psi and the pressure would jump around and the car would go lean. this is why I run a high flow pump big injectors and low pressure the id injectors work well and don't need a lot of pressure to atomize. I worked on a car that was running a fuel pressure of 15psi at idle and the car ran ok was low boost but still if you tried that on rc or stock injectors it wouldn't idle. I tried these are just my observations over the last few decades of playing with cars and bikes hope this helps
Joined: Dec 2007
Posts: 2,274
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From: Midwest
What fuel pressure do the 06 return less system operate at? I was told by SOS if I went to a return system and ran ap1 injectors I would have to up the base fuel pressure to 50 psi for the car to run correctly. Did the returnless system operate at a higher fuel pressure than ap1?
Sent from my SAMSUNG-SGH-I337 using Tapatalk
Sent from my SAMSUNG-SGH-I337 using Tapatalk
Joined: Mar 2008
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From: West Los Angeles
Originally Posted by s2k manic' timestamp='1409945135' post='23317829
if your driving on the highway in the heat I wouldn't go much below a 1/2 tank or if you're driving it hard. in the cooler weather you can get away with 1/4 tank but you shouldn't go much below that and I recommend an adjustable fpr so you aren't working the system harder than needed. that's the reason you have big injectors and large fuel pump we turned the fuel down to 20psi and the car still ran good I just bumped it up to near stock just because. remember a pump has more volume at lower pressure so once you get up to 65psi volume starts to fall like a rock. does that make sense? I think this is why my walbro got noisy low voltage high pressure low volume. I was maxing out the duration on the old 650cc injectors and it was all due to inadequate fuel volume lowering the pressure increased the volume and got my injector duration. down now with the 1000cc injectors I am at 45% duty cycle at 360whp so lots of head room
That's a bit too technical for me. All I know is that when I looked at my logs, I was running 95% duty cycle with ID1000's and am 320 pump. This is with about 10psi on a sos 1200.
My duty cycle shouldn't be that high should it. Judging by your 45% duty cycle, I'm guessing not.
I'm guessing that my pump isn't flowing nearly as much fuel as it should be.
http://www.scienceofspeed.com/produc...em_conversion/
This is the same reason I was at ~90% duty cycle with ID1000's with only 345whp. The fuel pump can only do so much before you need to convert to a return setup (which seems to be ~400whp from other memebers on here). I was going to try SOS's fuel pressure regulator that bumps the base pressure up a few psi when I swapped the pump also, as I figured it couldn't hurt. It's basically the same thing as "crushing" the OEM regulator that comptech recommends you do in their 06+ kits.
http://www.scienceofspeed.com/produc...ank_FPR_06-09/
Joined: Mar 2008
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From: West Los Angeles
What fuel pressure do the 06 return less system operate at? I was told by SOS if I went to a return system and ran ap1 injectors I would have to up the base fuel pressure to 50 psi for the car to run correctly. Did the returnless system operate at a higher fuel pressure than ap1?
Sent from my SAMSUNG-SGH-I337 using Tapatalk
Sent from my SAMSUNG-SGH-I337 using Tapatalk
http://www.scienceofspeed.com/produc...em_conversion/
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From: dfw
I see no reason to run that much fuel pressure with a return system the whole idea is to have more fuel volume on demand but at that pressure volume will be much lower there is a flow chart of all the popular pumps some where on the internet you can see the flow drop off as pressure rises and it happens to all pumps the 340 is efficient up to 65psi then you are flowing less than a 255 at 35psi just my two cents
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Joined: Jan 2010
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From: san gabriel valley
Going to install Aero 340 fuel pump this weekend with the rewire kit. I saw that SOS selling in tank pressure regulator, would it be a good idea to go ahead and replace for future upgrade
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Joined: Jan 2010
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From: san gabriel valley
Going to install Aero 340 fuel pump this weekend with the rewire kit. I saw that SOS selling in tank pressure regulator, would it be a good idea to go ahead and replace for future upgrade