How to install a Bosch 044 fuel pump in tank or intank - Page 2 - Miata Turbo Forum - Boost cars, acquire cats.

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Old 03-23-2011, 11:24 PM   #21
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I have an 044 in a non-Miata. It is ridiculously loud if it is pumping into a restriction like a kinked fuel line (or, perhaps, a restriction like stock fuel lines designed for a 120 HP engine). The check valve can also be a source of noise. My 044 (again, in a not-miata) got noticeably quieter when I ran new -6 AN hard line. The other problem I had (may not be an issue on the Miata) is backpressure on the fuel pressure regulator (engine-mounted) -- to get good 4 bar fuel pressure at 26 PSI I had to run it at 4.5 bar at idle, because the return line backpressure at high bypass (idle) artificially increased the pressure.

Also, that junk in your fuel tank isn't normal. I've looked into a few pristine 200,000+ mile gas tanks.
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Old 03-24-2011, 12:26 AM   #22
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If I'm ever in your area I'm gonna visit you and see how well that man juice **** sprays.
For real.
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Old 03-24-2011, 04:08 AM   #23
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One thing you guys that use the sock filter with that blue anodized adapter need to look at is the relative position of the filter media of the sock to the inlet on the adapter. The neck of the adapter is long enough that it seats all the way at the bottom of the sock. Meaning that when the sock is slid all the way on to the adapter, the only possible way for fuel to enter the adapter is through the area of sock which is pressed tight against the base of the adapter. You go from something like 10-12 sq/in of filter media to less than 1 sq/in. The solution is cut down some of the neck of the adapter to shorten it and get the opening up off the bottom of the sock. Pictures below.





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Old 03-24-2011, 09:43 AM   #24
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Quote:
Originally Posted by kday View Post
I have an 044 in a non-Miata. It is ridiculously loud if it is pumping into a restriction like a kinked fuel line (or, perhaps, a restriction like stock fuel lines designed for a 120 HP engine). The check valve can also be a source of noise. My 044 (again, in a not-miata) got noticeably quieter when I ran new -6 AN hard line. The other problem I had (may not be an issue on the Miata) is backpressure on the fuel pressure regulator (engine-mounted) -- to get good 4 bar fuel pressure at 26 PSI I had to run it at 4.5 bar at idle, because the return line backpressure at high bypass (idle) artificially increased the pressure.
You know, it actually is only intermittently loud. Sometimes it is loud after a long drive, other times, it is not. ??????

I am not convinced that the stock hard line cannot flow enough fuel. The stock fuel line is essentially a -5 line (5/16"). A -6 line is 3/8". The -6 is only 18% larger than a -5.
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Old 03-24-2011, 09:48 AM   #25
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Obviosuly it will whine more if your tank is less than half full.
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Old 03-24-2011, 10:38 AM   #26
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Quote:
Originally Posted by Faeflora View Post
The -6 is only 18% larger than a -5.
Actually, the area of the internal cross section is slightly more than 30% which affects the flow greatly.
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Old 03-24-2011, 10:58 AM   #27
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Quote:
Originally Posted by Reverant View Post
Obviosuly it will whine more if your tank is less than half full.
That or hes getting voltage oscillations
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Old 03-24-2011, 12:26 PM   #28
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Pump not hit bottom?

Good write-up, I need to save this somewhere.
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Old 03-24-2011, 12:39 PM   #29
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Quote:
Originally Posted by leatherface24 View Post
That or hes getting voltage oscillations
logged voltage indicates all is okish with voltage. i will see if it is quieter when tank is full.

Quote:
Originally Posted by fooger03 View Post
Pump not hit bottom?

Good write-up, I need to save this somewhere.
No, the way I mounted it up, it only sits about a half inch lower than the stock pump.
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Old 03-24-2011, 04:17 PM   #30
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I really like the dual 44 setup maybe that will be next on my car when I run out of fuel.lol
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Old 03-24-2011, 10:43 PM   #31
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Stolen from Paul Bird's twin-turbo carbon fiber bodied AIX Mustang build log, this is how you install a fuel pump. They are all Walbro 255 pumps.

Corner Carvers fuell plumbing tech

Quote:
Speaking of difficult solutions, this is my redneck version of an F1 type fuel system with a lift pump and swirl tank. This is, in my opinion, about as starvation resistant as you can get. And while heavy, it does allow me a margin on fuel use that I would not take with a convential setup. I can probably get away with running 3 gallons (apx. 18 lbs) less fuel than otherwise.

Twin Walbro 255 high pressure pumps with ATL pickups:


Pumps mounted in swirl tank:


This is the entire assembly which I fabricated from my Fuel Safe mounting plate.


BTW, the lift pump (another Walbro 255 operating at near 0 psi) is connected to one of these that resides in the back center of the cell:


Here is what it looks like from the outside. Nice and Clean with a hermetically sealed mil-spec connector handling the wiring:
And another photo I had of the assembly:
Name:  SwirlTankFinished-Small.jpg
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Old 03-24-2011, 10:49 PM   #32
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bizz nach!
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Old 03-24-2011, 11:01 PM   #33
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redneck?! that looks sexy as FUUUU
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Old 08-23-2011, 01:44 AM   #34
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Quote:
Originally Posted by curly View Post
This is nearly unreadable.

Wally=Walbro, correct? This is the first time a legitimate DIY write up has come very close to crossing over to being racist. Negro sock? I may have to change that.

Congratulations on finally doing something correctly.
Thread bump for a good writeup and "Negro sock". I can't stop laughing.
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Old 07-21-2012, 11:19 PM   #35
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Well my pump took a dump today, I just maned the ---- up and bought the stuff for this. I really hope I have a tuning solution before next weekend when I go to install it.
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Old 07-23-2012, 12:47 PM   #36
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We run twin Bosch 044s outside of the fuel cell in our Grand AM cars. Our set-up is flowing enough fuel for about 6000hp, which we are using about .000033% of that capability. We run both pumps all the time (we've had motors blow up because of fuel delivery issues before) and it is LOUD AS H E double hockey sticks.

It's okay though because race car. And once you actually fire the engine you no longer can hear the fuel pumps anyway.

Morale of the story is 044 is stupid loud for a street car.
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Old 03-26-2015, 05:07 PM   #37
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This is a nice post. Intriguing and entertaining. I didn't get bored reading it. Interesting!
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Old 03-26-2015, 09:34 PM   #38
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I have one of these pumps on my Miata in have a wally 255 in tank feeding an 044 and it is stupid loud but mine is Mount d basically to the top.of the tank I have zero fuel delivery problems with one pump so they work great but they are loud so just remember that when you mount it.
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Old 06-18-2017, 09:33 PM   #39
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Digging this back up like an episode of The walking dead when I was searching for a picture of a fuel sock installed correctly. A couple of things jumped out at me in this write up that should probably be corrected.

First the fuel sock installed by OP will result in the sock sticking up off the bottom at a 45 deg angle. After I got the assembly out of the tank it was obvious why the factory sock is angled. There is a sump in the front of the tank and the lines are angles to place the pump inlet in this sump. Turn the assembly upside down and hold the flange level and it'll be obvious why the sock needs to be angled.

Secondly, I can't imagine how much the fuel pressure rocks up with factory FPR. I installed a pressure sensor and with a walbro 255 I was seeing 10 to 12 psi increase at idle over the factory NB set point of 60psi. The 044 should be nuts and that's probably why it's so loud. In my opinion an 044 needs upgraded FPR and a larger line.
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