Outer Limits 4x4 Board

Gudday

How much of a power gain is there to be had by installing a 7psi lift pump?
I am thinking of using a Facet 24V unit with pump near fuel tank to deal with the noise.
The trucks had all the usual mods for extra hp.
Do they make a notable difference or just give you a warm feeling cause ya got one!

regards garth

it made my truck run better got rid of a hesitation at 3000 rpm and it feels a lot smoother all the way through the revs

Yeh have found that myself, revs free all the way to red line no more hesitation around 3000 rpm, Also seems to have better throttle response.

I used a Carter Comp Series Electric Fuel Pump 6-8PSI. may want to have a look at them as well.

Garth, there was a thread on patrol forum about this.

Apparently facet pumps good for n/a and stock pump gq otherwise carter or holley red I think it was for the bigger pumps. Someone had dyno info too.

nastytroll wrote:Garth, there was a thread on patrol forum about this.

Apparently facet pumps good for n/a and stock pump gq otherwise carter or holley red I think it was for the bigger pumps. Someone had dyno info too.

Any chance of getting a link posted?

These may help

http://www.patrol4x4.com/forum/showthre ... +fuel+pump

http://www.patrol4x4.com/forum/showthre ... +fuel+pump

I put 1 on my td42t and it started back firing and the rest and wouldn't tune up with it on after the new engine goes in I'll try it again

here's some info from the other site .......(not my words)

But, for my own piece of mind I'll list here what I have learned:

1) Fitting an electric pump at the tank end puts the fuel lines under pressure, not vacuum (or more correctly negative pressure !) therefore the lines will show any leaks at wet spots or sprays and you can smell the fuel. When under vacuum, the lines can hide leaks, drawing in air and causing problems that are hard to find. This is not to be under estimated, as many diesel maladies are caused by leaky fuel lines.

2) Its easier for a pump to push fuel than pull it.

3) The electric pump gives auto bleeding - a big plus.

4) As VE IPs wear, their ability to pull fuel from the tank weakens. This gives unstable engine running. Fitting an electric pump cures this problem and can give an old IP a new lease of life.

5) Further on from 4), the electric pump gives the IP a constant fuel line pressure and improves performance as fuel can be more accurately controlled by the IP. The engine will run smoother.

6) An electric pump removes the running out of fuel issue on steep hills.

7) The down side of a electric pump is the noise they create, so fit it under the car.

Hope that helps. Fitting a Holley red or similar is a good mod, but its got to be said, that an IP in good order is just fine without it, and some would say you are just adding something else to go wrong - but thats want us diesel heads like to do ! Go for it.

There it is........

regards garth

I have been told that a modified 12mm pump for big boost is better with an electric low pressure pump as it injector pump will empty the filter quickly and will require the internal feed pump to pull the fuel though quite hard. I hope that made sence.

The internal lift/feed pump inside the injector pump is only a small vane style pump, so if the feed ring or vanes wear or get pitted from water or other then it will help the pump greatly. Having said that usually by the time the feed pump needs work the rest of the pump could do with attension too.

the facets are to small and tend to become a restriction.

there was something about modded fuel pumps on high powered td42t's that where having problems sucking up enough fuel. hence the use of electric pusher pumps.

only problem can be with mechaincal IP is the pusher pump can sometimes upset the injection timing a bit. if that problem arises you could get around it my fitting a bypass regulator so the IP always receives constant pressure.

I fitted a Walbro 6 psi pump to mine. Instantly over came the mid rev stutter at about 22-2400 rpm. Found a couple of leaks that possibly would of been drawing in air previously. Definately made a difference in driveability, alot smoother through the revs and feels like it picked up a little power. Easy mod with good results.

What about a Pierburg low pressure pump? I can't stand Holley pumps, but I have found the Pierburg to be a good little reliable pump on performance cars. Where abouts have people fitted their pumps?

i had a few issues with carter pumps. Not possible to buy replacements parts regardless of what they claim. Warranty is ok though. i even tried to buy parts and was told they dont sell partsso have to do warranty.

Had to drive in the snowy mountains and back to sydney with a drum of fuel on the roof and gravity feed it.

anyone worked out a way of quietening the holley reds down? mines very noisy.
rubber mounted too..
as they dont lift, they just push, i had to mount it just behind the back of the cab, where the lines drop down to below the level of the tank.

what have other people done?

cheers, andy

Why not just fit a 4.8L in tank pump if you think you need the lift pump?

- David.

love ke70 wrote:anyone worked out a way of quietening the holley reds down? mines very noisy.
rubber mounted too..
as they dont lift, they just push, i had to mount it just behind the back of the cab, where the lines drop down to below the level of the tank.

what have other people done?

cheers, andy

the only way to make a holley red quiet is to use a 80g/h carter pump instead.

You can't use a efi pump as it pumps way to much pressure the aim is to just lift the fuel pressure more then just a flow

Efi pumps run at 40psi on , a Carter ,holley red ect.... Pump at 4-10psi

I personally us a Carter pump as it only pumps 7psi extra and 80g/m and it's not that Loud mines mounted above fuel filter and u can only hear it at idle with the radio off

brad-chevlux wrote:

love ke70 wrote:anyone worked out a way of quietening the holley reds down? mines very noisy.
rubber mounted too..
as they dont lift, they just push, i had to mount it just behind the back of the cab, where the lines drop down to below the level of the tank.

what have other people done?

cheers, andy

the only way to make a holley red quiet is to use a 80g/h carter pump instead.

this needs to be spread around more, i never read this before i bought my holley, and i read as many threads as i could find on the topic.

just re-reading the instructions, it says the pump should be mounted below the lowest point of the tank, as it shouldnt suck fuel, but if mounted above tank, its ok so long as it develops a syphon effect, whats the deal here? wont it do that no matter what, so long as there is no air in the system, if you undo the line at a lower point than the tank the fuel will flow through, creating a syphon effect, so you could mount it above the tank?
or is that a bad idea?

cheers, andy

TUFFMQ wrote:You can't use a efi pump as it pumps way to much pressure the aim is to just lift the fuel pressure more then just a flow

Efi pumps run at 40psi on , a Carter ,holley red ect.... Pump at 4-10psi

You will find that the pump in the tank is a low pressure lift pump. There is a second high pressure pump on the chassis rail to get to the injector pressure.

- David.

love ke70 wrote:

brad-chevlux wrote:

love ke70 wrote:anyone worked out a way of quietening the holley reds down? mines very noisy.
rubber mounted too..
as they dont lift, they just push, i had to mount it just behind the back of the cab, where the lines drop down to below the level of the tank.

what have other people done?

cheers, andy

the only way to make a holley red quiet is to use a 80g/h carter pump instead.

this needs to be spread around more, i never read this before i bought my holley, and i read as many threads as i could find on the topic.

just re-reading the instructions, it says the pump should be mounted below the lowest point of the tank, as it shouldnt suck fuel, but if mounted above tank, its ok so long as it develops a syphon effect, whats the deal here? wont it do that no matter what, so long as there is no air in the system, if you undo the line at a lower point than the tank the fuel will flow through, creating a syphon effect, so you could mount it above the tank?
or is that a bad idea?

cheers, andy

There just seems to be this 'thing' with holley pumps. when ever i mention using a carter pump most people jump up and down and say holley is better, but can never give a reason.

My choice is for the carter 80g/h pump because it's quiet and i've never had one leak or fail on me.
I've had more then enough holley red and blues leak and they are far far too noisy.
the bigger carter pump are noisy too, but not nearly as much as the comparable holley pump.



I'd also suggest anyone that fits these types of pumps also fits a bypass line with a correctly sized Ball Valve. that way IF it fails in the bush you only need to open the bypass line. It would save you from having to gravity feed from a drum on the roof

Or carry a small length of hose to replace buggard pump.....

Holley red dont have a good track record with blokes I have spoken to so sounds like Carter pumps have the nod, ....do they come in 24V? and if you mount them on chassis rail they ok underwater?

regards Garth

I would go a Carter over a Holley pump, but I would go a Pierburg over a Carter. They are really nice and compact unlike the Carter and are quiet and very reliable.

Who stocks Pierburg?

Pretty sure you can get them from Automotive Service Solutions (Petroject). Haven't bought one for a couple of years.

*Edit*

You could also try this mob http://www.injectacarb.com.au/-c-33.htm ... 20a539b789

thanks mate