Why no inline "booster" pumps?
Launching!
Joined: Oct 2013
Posts: 239
Likes: 0
Never noticed these $65 "380 lph" pumps before.
http://www.ebay.com/itm/MOSTPLUS-380...JZCnyj&vxp=mtr
Or these
http://www.ebay.com/itm/QUANTUM-380L...dY7qMm&vxp=mtr
Claim the same 71gph at 120psi claims that the AEM pumps do.
http://www.ebay.com/itm/MOSTPLUS-380...JZCnyj&vxp=mtr
Or these
http://www.ebay.com/itm/QUANTUM-380L...dY7qMm&vxp=mtr
Claim the same 71gph at 120psi claims that the AEM pumps do.
Thread Starter
Joined: May 2011
Posts: 8,485
Likes: 1,028
From: Wichita, KS
Seems like its cheaper these days to have products made crappy and provide a life time warranty. Think I was on my 14th autzone "life time" warranty alternator before I bought a decent one... 
Thread Starter
Joined: May 2011
Posts: 8,485
Likes: 1,028
From: Wichita, KS
I’d guess my AEM 380 has about 5-6 hours total of run time so far. Noticed it randomly becomes noticeably louder just street cruising it. Doesn’t seem to have issues supplying fuel at the moment. But It’s odd these pumps seem to change pitch after they are broken in. (even the china cheapies)
I’d guess my AEM 380 has about 5-6 hours total of run time so far. Noticed it randomly becomes noticeably louder just street cruising it. Doesn’t seem to have issues supplying fuel at the moment. But It’s odd these pumps seem to change pitch after they are broken in. (even the china cheapies)
9 Second Club
Joined: Nov 2003
Posts: 13,616
Likes: 185
From: Norn Iron
I’d guess my AEM 380 has about 5-6 hours total of run time so far. Noticed it randomly becomes noticeably louder just street cruising it. Doesn’t seem to have issues supplying fuel at the moment. But It’s odd these pumps seem to change pitch after they are broken in. (even the china cheapies)
That problem has re-occcured for me and it was not tissue related, I had..have water in the fuel....the joys of needing to weld a foam filled fuel tank, with no real way to get the foam out...and seemingly the water out too ! lol
That said, one of my pumps was getting noisy when the filter was restrictive that's fair enough. But even now when cleaned intermittently, one pump will still make a lot of noise. Oddly, usually after hitting a small bump in the road sets it off. And while the pump is noisy, fuel pressure drops immediately about 3psi or so, and the longer the noise remains there, pressure does fall very slowly.
Usually if I turn it off/on again it becomes quiet and back to normal pressure.
Now I could attribute a noisy pump to my aforementioned problems, but it still isnt inspiring me with confidence. When it's making the noise, it is pretty loud, but when it isnt, it's just a fairly normal pump noise.
But why so easy to go between quiet and loud no idea.
Thread Starter
Joined: May 2011
Posts: 8,485
Likes: 1,028
From: Wichita, KS
Ethanol should absorb the water pretty evenly so there shouldn’t be any water heavy “pockets” on my setup. Used a new OEM steel fuel tank with OEM fuel pump and sock filling the surge. 60 micron pre surge that feeds the AEM380. Checking the 60 micron filter is a good idea, I’ll do that. Should be fine. Hope this pump isn’t a stinker! Kinda built my whole fuel system around it.
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Pouria Savadkouei
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Verdad Gallardo
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
Top 10 Most Powerful Chevy Trucks Ever Made!
Hennessey's New Supercharged Silverado ZR2 Has 700 HP
Verdad Gallardo
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes
Verdad Gallardo
Awesome K5 Blazer Restomod Comes With C7 Corvette Power
Verdad Gallardo
10 Camaros You Should Never Buy
10 LS Engine Myths That Refuse to Die
Verdad Gallardo
TECH Addict
Joined: Oct 2016
Posts: 2,513
Likes: 480
From: PDX-OR-USA
A star as I can tell, Fuel cell foam comes in two flavors, gasoline proof, and alcohol proof. If you run street gas the alcohol stuff lasts longer,, but it will need replaces Avery year or so if its let get dry. You have to keep the tank full if you have cell foam to prevent breakdown.. I've never found a fuel cell foam that can handle both... Post up if you have a brand that works for more than a couple years without shedding..
9 Second Club
Joined: Nov 2003
Posts: 13,616
Likes: 185
From: Norn Iron
The foam ( yellow ) has been in my tank for around 15 years, since I built the car. The foam is 100% intact, pump gas only car.
The water came from when I was modifying the tank over the winter and needed to weld it...so filled/flushed the tank with water before doing so. Although it was left for many days before re-fitting.. although cold ambient temps probably fucked up any notion of it drying out.
When the tank was made originally there were no access doors, and the foam was welded into the tank.
I did cut an access door...but it seems my foam is in 2 large blocks, and I didnt want to risk ******* up the foam by pulling it out through the small door I cut.
Blue foam is supposed to be fine with methanol etc. Although I've only had that in 2 cars so far, one runs a DIY mix of fuels and 4-5 years on it's still perfect. The other only been running around a year.
I've seen those shitty plastic Jaz cells come with a black coloured foam inside. No idea what they're intended for. Hell it's just like 3-4 shitty rectangular blocks, than any real attempt to fill the cell with foam properly
The water came from when I was modifying the tank over the winter and needed to weld it...so filled/flushed the tank with water before doing so. Although it was left for many days before re-fitting.. although cold ambient temps probably fucked up any notion of it drying out.
When the tank was made originally there were no access doors, and the foam was welded into the tank.
I did cut an access door...but it seems my foam is in 2 large blocks, and I didnt want to risk ******* up the foam by pulling it out through the small door I cut.
Blue foam is supposed to be fine with methanol etc. Although I've only had that in 2 cars so far, one runs a DIY mix of fuels and 4-5 years on it's still perfect. The other only been running around a year.
I've seen those shitty plastic Jaz cells come with a black coloured foam inside. No idea what they're intended for. Hell it's just like 3-4 shitty rectangular blocks, than any real attempt to fill the cell with foam properly
I've had a JAZ cell with foam in my car for 20 years. The foam seems to be fine still even with E85.
I run a spin on 10 micron filter and cut it when I replace it, never any foam in it.
Still makes me nervous.
Probably not an issue just removing it.
I run a spin on 10 micron filter and cut it when I replace it, never any foam in it.
Still makes me nervous.
Probably not an issue just removing it.
Fuel pump flow testing? Yes I am finishing up the remainder of the tests now. I had to perform some validation and sanity checks to be sure I am presenting correct data. Also had a power supply issue when trying to power 2 or more pumps. I have since resolved that and plan on resuming the testing in the next week.
Stay tuned. Thanks for your interest.
Stay tuned. Thanks for your interest.
Stay tuned. Thanks for your interest.
Injectors have nothing to do with these tests.
After I finish this writeup, I am going to run the test with my in-tank Walbro pumps I currently have but that will come later once the car is running again, so that will be added to the original writeup like 6-8 months from now. I have a 450 and 255 sitting in the tank in the car. I had planned on running a 044 knockoff in front of each one of them as a test as well. I don't think 2 of these inline in front of a single Walbro would provide much benefit or make sense. 3 inline pumps would be a lot of current draw and restriction in 1 line.
if the pump is getting louder check the filters. every time mine gets loud cleaning the filters quiets it back down.
real aem 380 and real bosch 044 going for 2 years now on e85.
real aem 380 and real bosch 044 going for 2 years now on e85.
My reading on intercooler pumps in series vs parrallel leads to 2 things. Since they are liquid flow it would also apply to fuel pumps etc.
Single pump flows x flow at x pressure
2 equal pumps in parrallel = double the flow at the same pressure as one pump
2 equal pumps in series = 20-25% increase in flow over single pump but doubles the pressure capability.
Efi pumps are better at 40-50psi, once u get to 70psi they start to choke and it drops off quickly. Huge flow differences between 40psi and 70psi. The early walbro 450s had a check valve that opened at 80psi, new 450s have a revised check valve good for 100-120psi if I remember correctly. I have the flow charts but my walbro flows about 340 or something at 70psi compared to the 450 at 30-40psi. As you know standard fuel pressure is at 58psi and if u run 12psi boost (like me) your at 70psi fuel pressure at full boost. Adding a inline pump in series could provide a nice bump in flow very easily at the same fuel pressure, essentially being the 450 back up to 450 at 70psi. Pumps in series is a real thing, people do it for more flow but mostly more and higher flow at higher pressures.
I've thought about keeping my 450 intake and feeding my Holley dominator 1400hp dual inline pump... it would be super overkill lol but it has crossed my mind. I don't have an easy means to run dual pumps in the stock 3rd gen hanger without hacking up the sender for dual pump lines.
Single pump flows x flow at x pressure
2 equal pumps in parrallel = double the flow at the same pressure as one pump
2 equal pumps in series = 20-25% increase in flow over single pump but doubles the pressure capability.
Efi pumps are better at 40-50psi, once u get to 70psi they start to choke and it drops off quickly. Huge flow differences between 40psi and 70psi. The early walbro 450s had a check valve that opened at 80psi, new 450s have a revised check valve good for 100-120psi if I remember correctly. I have the flow charts but my walbro flows about 340 or something at 70psi compared to the 450 at 30-40psi. As you know standard fuel pressure is at 58psi and if u run 12psi boost (like me) your at 70psi fuel pressure at full boost. Adding a inline pump in series could provide a nice bump in flow very easily at the same fuel pressure, essentially being the 450 back up to 450 at 70psi. Pumps in series is a real thing, people do it for more flow but mostly more and higher flow at higher pressures.
I've thought about keeping my 450 intake and feeding my Holley dominator 1400hp dual inline pump... it would be super overkill lol but it has crossed my mind. I don't have an easy means to run dual pumps in the stock 3rd gen hanger without hacking up the sender for dual pump lines.
I'm running a 255 in tank feeding a 255 inline. Before the inline I was dropping pressure under boost. Now no pressure drop and it sits at like 68psi. Airflow and IDC on my Siemens 60lb injectors at 68 psi both work out to 750-800fwhp.