fuel Injection pump?

[F.C.]

I'm looking for suggestions for a continuously rated (i.e. not voltage controlled) fuel injection pump that can support 900+BHP.
Anyone with experience of fuel injection builds care to comment?

[Steve_D]

A pair of Bosch 044.
Either installed in tank or below a pressurised surge tank.

Steve

[F.C.]

Steve_D said:

A pair of Bosch 044.
Either installed in tank or below a pressurised surge tank.

Steve

I did think of tandem 0044's but couldn't find any info on pairing them up.
Would think they need a fair head as they don't like sucking, how would you pressurise the swirl pot/tank?

[macgtech]

A single (or even two) Holley style pumps to feed a 2l swirl pot and two Bosch 044's plumbed in with -8 lines.

[MattYorke]

Aeromotive A1000?

[F.C.]

MattYorke said:

Aeromotive A1000?

Voltage controlled unfortunately.

[Steve_D]

F.C. said:

I did think of tandem 0044's but couldn't find any info on pairing them up.
Would think they need a fair head as they don't like sucking, how would you pressurise the swirl pot/tank?

Google 'twin bosch 044 instal' and go to images. Lots of choice and plenty of manufacturers supplying manifolds and mounting brackets.

Supply your swirl pot/surge tank with a pair of low pressure pumps such as the ones supplied by the factory. These run at about 6-7psi and are self regulated. The fuel rail returns to the pot. Fit a return from the pot to one of the fuel tanks but restrict it to nothing more than a dribble as all you want to do is allow any trapped air to escape from the pot/tank. This restriction will allow the LP pumps to pressurize the pot to 6psi and help prevent cavitation at the inlet of the HP pumps.

Steve

[F.C.]

Steve_D said:

Google 'twin bosch 044 instal' and go to images. Lots of choice and plenty of manufacturers supplying manifolds and mounting brackets.

Supply your swirl pot/surge tank with a pair of low pressure pumps such as the ones supplied by the factory. These run at about 6-7psi and are self regulated. The fuel rail returns to the pot. Fit a return from the pot to one of the fuel tanks but restrict it to nothing more than a dribble as all you want to do is allow any trapped air to escape from the pot/tank. This restriction will allow the LP pumps to pressurize the pot to 6psi and help prevent cavitation at the inlet of the HP pumps.

Steve

Cheers for that, It seems I have this set up already, just need to swap out the old pump for the 044's.
As you mentioned I now see several solutions to mount these pumps, I wasn't sure they were fitted with check valves but am now happy they are, so hopefully will do the job nicely.

[andygtt]

F.C. said:

Steve_D said:

A pair of Bosch 044.
Either installed in tank or below a pressurised surge tank.

Steve

I did think of tandem 0044's but couldn't find any info on pairing them up.
Would think they need a fair head as they don't like sucking, how would you pressurise the swirl pot/tank?

another vote for two 044's, I run a pair on my noble and have over 700bhp, I run them side by side as the genuine have non return valves built in.

I have 2 lifters in the tank feeding a swirl pot, I drilled the return from the swirl pot to 3mm so that they provide a very slight pressure and the pumps sit at the bottom level of the swirl pot and are fed each by a -12 fitting and I then join them together after the pump into a single filter on the rail.

In this setup it can run 1200bhp boosted...

Alternatively You could go the aeromotive A1000 if you wanted a single pump, and I have an unused on on the shelf I would sell for less than a new one (around the price of 2 044's).

[F.C.]

andygtt said:

Alternatively You could go the aeromotive A1000 if you wanted a single pump, and I have an unused on on the shelf I would sell for less than a new one (around the price of 2 044's).

guess why I want to change to 044's.
A1000 purpled out after three years , only just found out they are not continuously rated at full pressure and need a voltage/"pulse" controller to run full time.
The nice thing about having two 044's is if one fails you should still have enough flow and pressure to run off boost in limp mode as it were.

[GarethGTR]

Hi

A lot of guys have a lot of experience on here, so there is some great advice.

I spent ages and fortunes on fuel delivery (and had problems), and now having built a few cars with same engine (LS3) I think the best solution is also the cheapest and simplest one....

Link the tanks and fit an in-tank high pressure pump. Job done. I have done this with great success.

No swirl pot, no heat issues (the entire tank acts as a heat sink), much less noise, much cleaner install.

Down sides:
You will have to mount the fuel pump. Not hard, but needs a bit of thought.
There will be a minimum fuel level in the tanks below which you may have surges due to air being picked up.

[F.C.]

GarethGTR said:

Down sides:
You will have to mount the fuel pump. Not hard, but needs a bit of thought.
There will be a minimum fuel level in the tanks below which you may have surges due to air being picked up.

This is precisely why I have stuck to two lifters (one standby) linked tanks and a swirl pot now feeding two 044 Bosch pumps, I can't afford to have cavitation on a boosted application. I did take a look at this:
http://www.summitracing.com/dom/parts/aei-18688/ov...

Very easy to fit and in a future build I would use this type and baffle the fuel tank(s) accordingly.

[GtrMan]

Since we are on this subject...

What would be the best as Low pressure pumps to feed the Surge pot and keep it filled supplying it from both tanks at one time...was thinking of a pair of Sytec ( one for each tank) in line , many models to choose from....the 3 bar should do ok.

Edited by GtrMan on Sunday 30th March 19:42

[Steve_D]

GtrMan said:

Since we are on this subject...

What would be the best as Low pressure pumps to feed the Surge pot and keep it filled supplying it from both tanks at one time...was thinking of a pair of Sytec ( one for each tank) in line , many models to choose from....the 3 bar should do ok.

I would use a lower pressure, high volume pump(s). Use a self regulated pump of about 6-7psi with a restriction producing vitually no return to the tank, just enough to clear any trapped air from the swirl.

The Carter pumps used by the Factory are fine and come with all the brakets etc required for a neat install.

Steve

[MarkWebb]

http://www.professional-products.com/secure/upload...

I would and will use the above with a speed controlled pump.

[F.C.]

GtrMan said:

Since we are on this subject...

What would be the best as Low pressure pumps to feed the Surge pot and keep it filled supplying it from both tanks at one time...was thinking of a pair of Sytec ( one for each tank) in line , many models to choose from....the 3 bar should do ok.

Edited by GtrMan on Sunday 30th March 19:42

You don't need a high pressure pump for supplying a swirl pot.
Better a low pressure high volume pump that you can regulate (or not) depending on your system.

[GtrMan]

Thanks for the info........

Using a return on the surge tank can allow for a medium high press pump , like the 3 bar quoted.

[Steve_D]

GtrMan said:

Thanks for the info........

Using a return on the surge tank can allow for a medium high press pump , like the 3 bar quoted.

But why would you want a pump that is working harder than needs be, putting heat into the fuel, putting a heavy drain on the electrics etc.

Steve

[andygtt]

Steve_D said:

GtrMan said:

Thanks for the info........

Using a return on the surge tank can allow for a medium high press pump , like the 3 bar quoted.

But why would you want a pump that is working harder than needs be, putting heat into the fuel, putting a heavy drain on the electrics etc.

Steve

what he said, a high pressure pump will not be as efficient as a proper spec one for the job and will be heavier, cost more, require more amps and not as reliable long term.

I fitted 2 small lifters rated to 550bhp constant each that feed and very slightly pressurise my in tank swirl pot, then 2 044's do the fuel delivery to the rail!

[F.C.]

GtrMan said:

Thanks for the info........

Using a return on the surge tank can allow for a medium high press pump , like the 3 bar quoted.

This would be a mistake IMO.
You don't need 45PSI, a 7psi(or so) high volume pump will take the stress out of the system in heat, amps and noise.