pungent

Have installed a Bosh 044 external fuel pump on my VR 5L due to standard pump tossing it in. Havn't started car as yet.

Thinking about putting my adjustable fuel reg on.

Will the factory reg be fine with this pump and if I do put the adjustable reg on now what pressure are the factory reg's set at.

Any advise is helpful. Thanks.

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PVE

You have some options:
1. Go to your Holden dealer and they can tell you the grams/second. BEST OPTION
2. Fit a pressure regulator and adjust your pressure to give you the 14.7:1 when in cruise closed loop.

If you push your fuel pressure above OEM then the engine will be rich, conversely if you operate a lower fuel pressure the engine will be lean.

You could use your standard pressure regulator, however with the higher flow of an 044 there will be a lot more in bypass! Not sure what this will do.

Unsure about NOT having an in-tank pump. Where will your suction be located?? You need to make sure suction stays covered.

This is for a VT.......
Fuel Pump Capacity:
High Pressure Pump - V6 and V8 Engines 21 grams/sec @ 350 ± 5 kPa with
12.5 ± 0.1 Volt applied (166 lb/hr @ 50psi)
V6 Supercharged Engine 30 grams/sec @ 410 ± 5 kPa with
12.5 ± 0.1 Volt applied (238 lb/hr @ 60psi)
Note the V6 SC in-tank pump is capable 9 grams/sec at 60kpa higher pressure.
Voltage is critical to quantity delivered. 1 volt drop; approx 10% loss in flow.


I would have gone with an upgraded in tank pump e.g Walbro. Depending on your engine upgrades dictates your fuel requirement. It is easily calculated.

I have a 044 on a surge tank supplied by in-tank pump. Most 044 are noisy!

pumba

my thoughts exactally. i just did the pump on my VP SS as the original one died in the ass. i went for a Walbro 255L/ph intank pump. i was looking at a Bosch 044 with a standard VL intank low pressure pump to feed it, but i needed it done ASAP so i got the Walbro instead.

im still using the standard regulator on mine and it is fine. no more pinging now

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pungent

In tank may have been a better option but the bosh was given to me at the right price and I more like the idea of an external pump, but thats me.

Only looking at short term at the moment so if the factory reg will be fine I won't worry about the adjustable reg. When the custom memcal is done and put on the dyno fuel pressure will be reworked out for the bigger injectors etc.

It's only a few weeks and the engine is being pulled apart.

Thanks for the advise.

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pungent

Well car's running fine with standard reg and the pump is quiet as so im more than happy for the time being.

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allports

Pungent, is that with the new part you got?
gee my 044 is quite as a mouse, Ive heard lots of guys say they are noisey but one of my customers fits dozens and never seem to be noisey.

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pungent

Na new part not in yet mate. Be about 5-6 weeks as the whole top end will all be done at once to match the custom memcal etc

The fuel pump shite it self and got the 044 at a good price so thought mite as well up grade. Quiet yes very but I am used to carby cars and having a holley blue buzzing away at the rear lol.

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