Graham Palmer
Club Member
Hi, think I probably should change the filter....currently its a WIX 8144...but cannot find them anywhere....what's the consensus on best solution today ?...thanks
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fuel filters for 240z ?
- Thread starter Graham Palmer
- Start date
Sure about that!? 
https://www.ebay.co.uk/itm/WIX-FILT...-/313451522994?_trksid=p2349624.m46890.l49286
lots more here ...
https://www.rockauto.com/en/catalog/nissan,1972,240z,2.4l+l6,1209169
https://www.ebay.co.uk/itm/WIX-FILT...-/313451522994?_trksid=p2349624.m46890.l49286
lots more here ...
https://www.rockauto.com/en/catalog/nissan,1972,240z,2.4l+l6,1209169
Graham Palmer
Club Member
excellent...thanks !...guess I need to work on my Googling !
TimFZ
Club Member
On my 1975 Fairlady z L20 engine I now have a setup with 3 filters and swapping the cheap one regularly as my tank is due a flush.
One inline, straight after the tank (with a ball valve tap between to allow isolation for on the road swaps if required), a clear paper filter before the pump which gets swapped when crud builds up. Then a second paper filter before carbs.
Once tank is flushed, will probably go back to two. A screening filter pre pump and a post fine one.
One inline, straight after the tank (with a ball valve tap between to allow isolation for on the road swaps if required), a clear paper filter before the pump which gets swapped when crud builds up. Then a second paper filter before carbs.
Once tank is flushed, will probably go back to two. A screening filter pre pump and a post fine one.
Bazzateer
Club Member
That's a sensible set-up. I'd be tempted to keep all three after the tank is sorted, sort of belt, braces and a wedgie just to be extra sure!.
240L31
Club Member
I don't get what several similar in-line filters should do. If debris passes the first filter, it will also pass the second (assuming it is the same mesh size). Don't forget that each filter induces a significant pressure drop.
In my opinion, a pre pump filter (150µ mesh) and regular paper filter after pump is perfectly fine.
In my opinion, a pre pump filter (150µ mesh) and regular paper filter after pump is perfectly fine.
uk66fastback
Club Member
Just get the tank and the lines sorted and you only really need the one. I’m currently doing this sod of a job!
TimFZ
Club Member
Big crap needs to be caught before the pump. Finer crap after so it doesn't get to carbs.
But, as so much is coming from tank, its good to keep collecting and changing a cheap filter regularly. I'm happy to do this for now until I'm sure the tank is flushed properly.
With regard to pressure drop, a clean filter should not have more pressure drop than a 6 to 8mm fuel line and can collect big stuff with minimal effect. Provided it doesn't become clogged of course then pressure drop exponentially increases and flow stops.
The idea is to clear the tank as best is possible, flush and drain, put cleaner through lines and blow through, new flexi sections. Then and only then will I go back to minimal filtration!
But, as so much is coming from tank, its good to keep collecting and changing a cheap filter regularly. I'm happy to do this for now until I'm sure the tank is flushed properly.
With regard to pressure drop, a clean filter should not have more pressure drop than a 6 to 8mm fuel line and can collect big stuff with minimal effect. Provided it doesn't become clogged of course then pressure drop exponentially increases and flow stops.
The idea is to clear the tank as best is possible, flush and drain, put cleaner through lines and blow through, new flexi sections. Then and only then will I go back to minimal filtration!
But still, two inline filters with the same mesh size have no advantage over a single one
The only advantage I can see is stopping your elec pump or hard lines filling with crud from the tank before it gets to the engine bay filter (before the mech pump).
240L31
Club Member
Yes sure you need a filter pre pump. My point is that two filters after the pump are pretty much useless
Pressure drop before the pump is much more critical compared to after pump. That is why pre pump filters are usually coarse grid, whereas pre carb filters are much finer (paper style)
Pressure drop before the pump is much more critical compared to after pump. That is why pre pump filters are usually coarse grid, whereas pre carb filters are much finer (paper style)
So for £49,950 you don't get a service?
TimFZ
Club Member
Yes sure you need a filter pre pump. My point is that two filters after the pump are pretty much useless
Pressure drop before the pump is much more critical compared to after pump. That is why pre pump filters are usually coarse grid, whereas pre carb filters are much finer (paper style)
Yes, coarse before, say 70 plus microns, first after 30 microns, second 5 microns possibly (but maybe not that fine if you run carbs which will be more tolerant than injection.).
Always start coarse and then move to finer. It makes the finer one's last longer too!