I think the only people running a check valve are the single 044+weldon types...totally different setup than dual 044 etc.

 

so there is no check valves needed on duel bosh 044 pumps running their own individual feeds to each side of rail?

 

Nope

 

Yes you need a check valve for dual 044s! I just bought mine from Jay Racing on Friday.

Edit: I just saw you're planning to run them both at the same time. Dunno if a check valve is needed for that. I was told by FSR Motorsports as well as PHR when I ordered my dual 044 hanger that yes I will need a check valve on one of the pumps if I plan to run a staged setup.

 

im planning on going a staged pump set up controlled by the pro efi. so I will need to buy this check valve and install in-line on one of the feed lines only

 

^^ We are running the exact same setup.

 

thank you so much, will order one today! do you have a link to the one you got?

 

more detailed: I had 2 pumps in the tank last year. One was a Walbro and the other one was the stock TT fuel pump. The Walbro went bad but I only recognized that after installing it into another Supra. I have a dual feed fuel rail and therewith 2 individual feed lines. I recognized that the car would barely start once it was warm. Cold start was no issue. At this time I had no additional check valves in the system. Dont know if the pumps have internal ones.
Now I am planning to run Dual 044 with the same setup (dual feed).
Actually I wish someone can tell me that the hot start issues were related to the lack of check valves in the feed lines...

 

Also do you attach the check valve directly to the top of the pump or somewhere inline

 

I am planning to place them shortly before the rail.

 

IS THIS WHAT I NEED? LOOKS LIKE IT GOES TO THE PUMP DIRECTLY

http://www.jayracing.com/fuel-fitti...ters-c-2_12/low-profile-bosch-044-high-flow-check-valve-8an-outlet-p-35551.html

 

Yes that is exactly what you need. It screws right into the top of the pump.

 

just one right not one for each pump....

 

Yeah I was told only one. I will receive my hanger and check valve in the next day or two and will take a picture of the complete dual pump assembly then. PHR told me to replace the fittings for the higher pump supplied with their hanger with the check valve so it connects the pump/check valve/hat. Hope that makes sense and good luck!!

 

Did you put a check valve on both pump or just one for your PHR hangar?

I have the extension piece for the lower pump being machined to accommodate the check valve plus a union from JayRacing. This will permit the 2nd pump to be blocked during light load operation. The higher pump (closer to the hat) would require a custom fitting since there is limited clearance. If you have found something for this upper pump, by all means, let me know.

DP

 

will wait for pics. thank you!!!!

 

Most pumps have built in check valves. They are to keep your fuel system pressureized after you shut it down. If you loose fp when the engine is hot you will boil the fuel in your rail and have hot restart issues. I don't know about 044's but all OEM and most walbros have check valves

 

I was told by PHR I would be able to simply replace the fittings for the higher pump with the check valve and be good to go. You're saying you found this not to be true?

Yes only one check valve.

You have the CNC PHR dual 044 hanger correct? I'm gonna be bummed if this isn't as "ready to go out of the box" as I was led on to believe.

 

I do have the PHR hangar. I will check again tonight from what your saying, but I am sure I am right.

DP

 

Son of a bitch, please let me know.

 

It seems to me that with a staged pump setup, you would need a check valve on the secondary pump, or somewhere before the two lines merge, to ensure that the pressure created by the primary pump does not bleed back through the secondary pump. If the secondary pump only runs when triggered by the ECU, and there is no check valve there, most of the pressure created by the primary pump would flow back through the secondary pump. I don't know if the 044's have a built-in check.

 

O44's DO NOT have built in check valves. The check valve is external on the outlet. When using the PHR hangar one must incorporate a check valve at one pump outlet because they both merge in the hat prior to exiting the hat. Therefore, placement of this valve is critical unless you have both pumps running 100% (not staged).

If you are not using the PHR hangar, XRP makes a nifty fitting that will use the stock Bosch external check valve. If that doesn't work, then the JayRacing fitting is better suited.

DP

 

Just received my dual 044 hanger in the mail! Didn't know I had to assemble the thing myself :lol:

Just waiting for the check valve now. Maybe today or tomorrow.

 

** EDIT**

This is the better solution. I believe clearance issue will utimately present itself. This is the JayRacing valve with a female to female union. You can see amount of stock that must be removed to accommodate the valve and union.

Use the fitting below at your own risk!
http://www.westernperformanceonline...com/XRP-Female-AN-Flare-to-Male-O-Ring-Boss-Swivel-Fitting--Straight_p_574.html

This may be the ticket to get the higher mounted pump + the JayRacing check valve to install. I need to confirm the O-ring threads.

You will remove the factory brass Male thread to female AN that comes with teh Bosch pump. This part has the brass crush washers on each side.

I think I am going to get some info to see if I can use this vs. machining the other part.

DP

 

I am so confused. I was told when i ordered the hanger to just replace this brass fitting shown here with the Jay Racing check valve. You're saying there's not enough clearance to make that happen? What is obstructing it? I haven't received my check valve yet, it will probably be here tomorrow so I will be able to see for myself as well.

 

The fitting in my picture that is threaded into the left side of the union is the metric male thread to male -6an JayRacing Check Valve.

The brass fitting is metric male to female -6AN thread.

See the issue?

The JayRacing check valve does not have the proper seat to allow for the O-ring to be transferred to the opposite of the valve (AN side) so it will thread up into the hat and seat with the taper in the hat.

You can try, but I think it will leak.

DP

 

Yeah sorry I went through the assembly instructions and I understand what you mean now. The XRP fitting you posted in the link seems like an awesome solution as long as we can verify the O-ring threads going into the hat are the same. Thanks for all your explanation and input!

 

Pat,

Were you going to try the XRP fitting? If so, let me know how it goes. I am set on doing the machining.

DP