Dual Bosch 044's
Who makes your tank?
David,
i have a alum tank that can fit the stock basket. it is nice.
and it has a sump.
i am shooting for 1000 wheel horse with e85. so i got to figure around 1300 wheel on 91.
______________
question is. can i run two walbo 255 intank with external bosh 044. and be good.
or try and fit two bosh 044 intank like down in the sump so they are covered in fuel. and one wlbor 25 in basket?
well i guess what is your thought.
---picture of tank is below---
i have a alum tank that can fit the stock basket. it is nice.
and it has a sump.
i am shooting for 1000 wheel horse with e85. so i got to figure around 1300 wheel on 91.
______________
question is. can i run two walbo 255 intank with external bosh 044. and be good.
or try and fit two bosh 044 intank like down in the sump so they are covered in fuel. and one wlbor 25 in basket?
well i guess what is your thought.
---picture of tank is below---
Thread Starter
Joined: Sep 2004
Posts: 2,552
Likes: 12
From: Visalia, California
Well now I'm confused, so any regulator I get (like the MAA-4305M) with single -8an inlet and triple outlet will be hooked up, sump --> filter --> fuel pumps --> Y (to get to one line) --> Rail --> -8an Crossover --> Regulator on other rail --> Return
Nothing coming out of "outlet" ports, those are plugged, right?
Nothing coming out of "outlet" ports, those are plugged, right?
yea its been a while, i believe thats the external version.
Thread Starter
Joined: Sep 2004
Posts: 2,552
Likes: 12
From: Visalia, California
Of course mouse, the mallory unit has -8an inlet, three outlets and a return. I wouldn't use the inlet off the rail and return to the tank, blocking off all 3 outlets? $100 is pretty cheap for a boost referenced unit, not sure if I trust it...
On The Tree
Joined: Aug 2007
Posts: 112
Likes: 0
From: Finland
When you are using dual (or more) pumps pushing to same line, do you use one-way valves on the pumps that will be used only on "kill-mode"?
Also having thoughts of using dual 044s, is it correct to use -8 from tank to each pump, then -6 from each pump to y-block and -8 mainline to rails? Would this support 1200fwhp on gas?
Also having thoughts of using dual 044s, is it correct to use -8 from tank to each pump, then -6 from each pump to y-block and -8 mainline to rails? Would this support 1200fwhp on gas?
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9 Second Club
Joined: Nov 2003
Posts: 13,616
Likes: 185
From: Norn Iron
044 does not have a built in check valve. Although the little add-on piece it comes with does incorporate one. But it is not part of the pump.
I run my 044's all the tme. Never had any problems.
2 pumps, into a single 1/2" line to the front of the car
This enters a fuel dist block. Then I feed each rail with a single -6 line ( well, 2 of them )
These 2 rails then exit, combining into a single -6 line to the magnafuel regulator.
Then a -6 returning to my tank.
I run my 044's all the tme. Never had any problems.
2 pumps, into a single 1/2" line to the front of the car
This enters a fuel dist block. Then I feed each rail with a single -6 line ( well, 2 of them )
These 2 rails then exit, combining into a single -6 line to the magnafuel regulator.
Then a -6 returning to my tank.
Thread Starter
Joined: Sep 2004
Posts: 2,552
Likes: 12
From: Visalia, California
I picked up two of the walbros, those suckers are small, they're 10mm to -6an (now) which will suffice for the 4.8 @ 15psi , still not 100% sure on the 408. Got my regulator also (the magnafuel 9950-B), so run it.
Registered User
Joined: Aug 2009
Posts: 1
Likes: 0
From: Buckeye, Arizona
When running two pumps in parallel do you need to incorporate a check valve on the pump that's boost activated?
I intend on following a similar route with my TT C5 Z06.
Thinking on running a walbro 255 hp and bosch 044 both in tank.
I intend on following a similar route with my TT C5 Z06.
Thinking on running a walbro 255 hp and bosch 044 both in tank.
walbro inline GSL392 flows more then intank 255 pump at higher pressure
The flow is not a constant, as pressure goes up flow goes down.
9 Second Club
Joined: Nov 2003
Posts: 13,616
Likes: 185
From: Norn Iron
The 044 doesnt flow a big pile more. But the Walbro flow drops off a lot as pressure rises. Above 70psi, the Walbro struggles.
The 044 will maintain flow rates til over 100psi without any bother.
The 044 does cost a lot more though.
The 044 will maintain flow rates til over 100psi without any bother.
The 044 does cost a lot more though.
Thanks for the info!
Also, as far as amp draw goes, do these pumps always run flat out, drawing the max amperage? I think the Bosch 044 is rated at 15.5 amps. Does this mean that it's always drawing 15.5 amps, whether you're idling at a stoplight or under WOT?
That adds up... two 044's drawing 15.5 amps a piece is 31 amps. That's a lot of draw on your alternator!!
Also, as far as amp draw goes, do these pumps always run flat out, drawing the max amperage? I think the Bosch 044 is rated at 15.5 amps. Does this mean that it's always drawing 15.5 amps, whether you're idling at a stoplight or under WOT?
That adds up... two 044's drawing 15.5 amps a piece is 31 amps. That's a lot of draw on your alternator!!
9 Second Club
Joined: Nov 2003
Posts: 13,616
Likes: 185
From: Norn Iron
Thre more pressure you put the pump under, the more current it will draw. No different to any pump.
I run both of my pumps at about 55psi base pressure +20psi boost. So a max of around 75psi.
These are both fed via a single 30A fuse, which has never blown in some 2-3 years of use. Although Ive never measured actual current usage.
Headlights, heated screens, heated seats, big stereos etc etc all place quite a load on the alternator too. I wouldnt worry about it.
I run both of my pumps at about 55psi base pressure +20psi boost. So a max of around 75psi.
These are both fed via a single 30A fuse, which has never blown in some 2-3 years of use. Although Ive never measured actual current usage.
Headlights, heated screens, heated seats, big stereos etc etc all place quite a load on the alternator too. I wouldnt worry about it.
Thread Starter
Joined: Sep 2004
Posts: 2,552
Likes: 12
From: Visalia, California
Clean setup John. I picked up two of the bosch units, damn they're small. I'm only going to run 60psi pressure so they should still flow okay, the second unit being activated with hobbs switch (unless that really is unnecessary) with a manual override.
