fuel flow rate

[coolbigrock]

the rave manual says that the fuel filter for the td5 has a low rate of 180 l/hr or 47.6 us gallons/hr.what are the effect of putting in a fuel filter that has less flow rate like 30 gph/ 114 lph.

[coolbigrock]

sorry that should be the fuel pump and not the filter.

[Yorkshire_Jon]

As far as i know, it is more critical that the pump can sustain the relevant pressure (4 bar) whilst delivering the required fuel to the engine.

The pump also needs to be able to take the sustained high temperature of the unspent, return fuel flow.

If you already have the (lesser spec'd) pump and presumably your TD5 one is goosed, try it and see.

You will need to test with the engine running under sustained high speed and load to confirm if the pump is suitable (i.e. under maximum fuel demand).

You can also connect a fuel pressure gauge to where the fuel temp sensor (?) is located. - simply unscrew the sensore and replace with a pressure gauge.

[Hamish71]

You can also connect a fuel pressure gauge to where the fuel temp sensor (?) is located. - simply unscrew the sensore and replace with a pressure gauge.



More information on "fuel pressure gauge" please.....I have been chasing one for a while to try and solve issues I am having.

[Blknight.aus]

its just a low pressure oil safe pressure gauge.

pull the sensor head to a hyd shop and get them to give you a t pice that is male-female and a bit of line that plugs onto the 3rd leg of the T plus a gauge that can do 150psi.

[coolbigrock]

r & d.putting on a filter that has less fuel flow specs does the effected the engine.the filter has 30 gph rating,so will have to do away with that.pump may be maintaining the pressure but the flow can be affected.it isn't the pump that i have change it is the filter.

[Blknight.aus]

why do you need to change the filter? whats wrong with the OEM one?

[coolbigrock]

just want better filtration,nothing wrong with the ome,3 micron is good,but if i can get a better one it would be good.a longer one would also be nice.where i live the diesel isn't all the best.

[coolbigrock]

r & d : putting on a fuel filter with a low spec flow rate does effect the engine,fuel pressure is being maintain but not the flow rate of the fuel going to engine,it is like having a dirty fuel filter.so i have made an adapter to fit a 1" -14 spin-on filter to the M16 x 1.5 filter head.again it is a Donaldson filter,P551313, it is bigger then the ome and has 2 micron rating then 3 micron the ome has too.

[LOVEMYRANGIE]

Put in a second OEM filter in parallel.
Might be a feadhuck to plumb but the benefit is you significantly drop the filter media flow rate reducing plugging of the filter with a reduced permeate velocity.
A better alternative is to source a secondary filter, and there are plenty around, that will handle the flowrate but have a finer micron rate and run it after the main OEM filter as a straight thru unit.
I would have a look at some of the truck options available thru Fleetguard (Cummins Filtration). Most of the current model Japanese light trucks require a filtration media of less than 3 micron due to super high pressure injection.
You may also find a sub 3 micron filter available that will fit the current housing but it will need to be physically much larger volume than the OEM to cope with the flow.
The finer the media, the larger the filtration area required to compensate.
Using a filter of a lesser flow capacity will cause more dramas than it solves. High headloss from a reduced will mean flow restriction and faster filter plugging.

Cheers

Andrew


Not sent from my PC using Firefox!!

[coolbigrock]

@ lovemyrangie, yes i have thought about putting in a second filter.plumbing wouldn't be a problem.again if i was get good fuel i would have done that however we don't.the filter that i have on now was to be the secondary fuel filter, but if the ome is clog and that one is new,flow rate would be affected again.in my mind it is best to have one filter.the one that is on has a 2 micron rating.