Twin Bosch 044's Setup Progressively

[01txr]

Ok just need to work out best way to setup twin Bosch 044's.

Is the factory pump regulated by the Ecu or does it run at full voltage

Continuously.

I'm not wanting to run both 044 pumps continuously as don't want high

Recirculating happening while driving sedately or idling.

As well why waste the life of the pump while it's not required.

Now if the factory Ecu does control the in tank pump well I can tap into

It's power feed as my signal for the 044's and all is good. (fingers crossed).

If it does not control the in tank pump then I need to look else where.

Can I use any of the factory boost, map sensors for a trigger wire.

Other then that I need to find a variable pressure switch that I can

Set to control the second pump either by boost or fuel pressure.

Eg

set it at 55-57psi to switch 2nd pump on.

Switch off at 57psi.

Or boost sensor to activate 2nd pump at 10-12psi

If anyone has done a setup in either way as above please reply.

Interested in what was used as well cost and where to get required bits.

Aother option is if I was to run a single large pump I still would

Like to control pump flow.

I have currently got the process west surge tank and worried on weather

It's capacity is sufficient to feed twin 044's.

If anyone can comfirm the capacity to be adequate please do so.

Keep in mind I will be wanting to do some circuit laps from

time to time not just drag runs.

Fuel system required to support To4z custom setup, full port head.

[JETURBO]

run the std set up for normal and flick a switch for drags/circuit work easy as that really so 2nd pump on as u want it

anything else your gunna just overcomplicate the system or id be worried it wouldnt kick in at desired psi if not used offen

[Paulie2256]

You could probably use ye revvs as a reliable source to activate to second pump. The signal is pretty easy to obtain.

A tuner will be able to help you out but it definitely isn't a complicated set up.

[turbotrana]

You have not told us what fuel you are using. If using normal fuel the Bosch 044 is a crap pump to start off with. I dont know whether it is still a noisy pump on hot days using E85.

In the past I have run a voltage booster switched on by an ECU or you could switch it on many different ways. The voltage booster would run the pump at up to 20volts under boost and is a far superior way than running two noisy pumps.

Pierburg have a good strong pump and I would try this over the 044.

[01txr]

I'm also going to get a eboost 2 maybe I can control it with it????

Doing it to revs probably won't be good as its the load and boost that will require the second pump to feed.

Or might just forget trying to run pressure sensor switches and just rig a switch on the throttle pedal.

Running plx wideband o2 gauge that has adjustable warnings and peak holds. able to tell if 2nd pump is not activating by its reading.

Turborana what power are the Pittsburg pumps good for at 20volts.

How reliable are they running at 20v.

Just running 98 fuel.

May go to e85 when and if I can buy it locally.

Also been thinking on running the billet Holley inline twin pump unit (2 pumps in the one billet housing).

It has 2 power feeds so can run one continuously with the other as needed.

Think there is 3 versions one rated at 1000hp then 1500hp and 2000hp.

They also look fantasic.

[dre]

I know it can be done in the tune as I know of one car that has it setup this way. He was tuned by Nizpro. Possibly go and see them?

[01txr]

Here's the Holley pump I think I may go with instead of the twin 044's.

eBay 300650123857

1400hp rated.

I'll look at my sct racer pro software today to see if I can find a option.

Be good if it can. Just have to find out what pin to use or wire to tap into.

It will probably only have control option for in tank pump which won't help the secondary pump control.

Probably just go with the micro switch on the throttle peddle.

It will be the easiest way to do it.

But still be good to have it kick in at the precise moment as the primary pump starts to drop pressure.

[turbotrana]

With the low/high voltage setup it only runs high voltage above 10psi. It switches via a relay setup so it does not operate much at all. I have used it on 044s and no problem but want to switch to the Pierburg. The 044 at 18 to 20volts does pump alot of fuel. The Holley looks OK but I always prefer using just the one pump. If it fails the car shuts down. If using two pumps it can pose issues if one fails without knowing. I just dont want to be able to hear the pump much inside or outside of the car. The guys who run two 044s continuously have got rocks in their head. Just not the way to do it.

[01txr]

Turborana more on the pierburg pump.

Comparing it with the 044 are you saying its a quiter pump.

Can you eloborate a bit more, is it a different design pump

Which makes it quiter.

Could you give me a model number Iso I can look into it.

I have heard around the place that they are a good pump.

On the higher volt supply circuit I would use a 10 psi pressure switch to earth terminal on relay then power factory fuel pump pin/wire to trigger the relay. . Run power from battery to fuse then to relay.

Power from relay to a voltage booster.

Then to pump.

For the 12v continious supply I will link the factory pump pin/wire to 2nd relay with ground to chassis. link 12v power from other relay.

Power straight to pump for 12v continuous supply.

By using the relays it will isolate the Ecu seeing more voltage.

By using the factory pump power supply for the trigger will keep it safe with the fuel shut off via Ecu control if involved in accident.

How's that sound or is there a better way.

What voltage booster do you recommend to use.

Do I have to mount it in cabin or will it be ok in engine bay.

Had a quick glance at the the options for fuel pump control in the tune software and didn't notice anything useful as yet.

I doubt there is anything in there to use unless three is a option for 2nd pump.

Then I would need to find what pin/wire is assigned.

Wouldn't it be nice if ford has a multi pump option in there. (can only dream)

Noticed Jegs in the US sell a fuel controller for multiply pumps but it's over $300.

It would be great but can't really justify spending that when there are so many cheaper ways of getting similar results.

[01txr]

Just found a test performed on the 044 at different volts and pressures. 

http://www.lxforums.com/board/f88/bosch-044-fuel-pump-flow-158349/

What a huge differance. 

Example the 60psi (closest to what our cars run at 58psi)

13 volts.        = 657 lb/hr

18.75 volts.   = 921 lb/hr

Take into account at recommended minium of 12v they support 700hp

What will they support at 18.75v (921 lb/hr)

Looking good to just run a single pump now as turborana suggested.