Fuel Filter Discussion

[Gareth87]

Been reading the feeds on fuel filters. I currently run a 300zx paper filter before my lift pump followed by the walbro strainer and a 40 micro mesh filter after the pump.

I read the paper filters are a bit of an issue with flow amd the glue failing. Luckily, as I'm only running a paper filter on the lift pump, flow isn't a big issue. But, has anyone got something to recommend that doesn't seem to break down?

This might be a stupid idea, but what about the holden cars running flex fuel? Surely their filter part number will be fine..

[Dale FZ1]

Are you running petrol or E85?

Haven't heard of paper filters failing or being inadequate for the job with petrol. Z200, used with 8mm lines and petrol have had good results.

What size fuel lines are you using?

[Gareth87]

Sorry. Should of been clearer. I'm using e85

[scotty nm35]

I have seen a few filter issues on e85 over the years, paper filters getting completely blocked within a few weeks, filters collapsing, spark plugs going red and only attributable to the filter... Why wouldn't you just upgrade to a 40 micron stainless version and know it will be fine long term? (100 micron on the inlet may be better if you must run something.)

Personally, I wouldn't be running a filter before any pump, (other than the recommended sock filter) as it can cause cavitation inside the pump. They generally don't like restrictions on the inlet side.

[Gareth87]

Hey Scotty,

I have a 40 micron proflow filter before my fuel rail. Is there any need to go below 40 micron?

Great idea about changing the filter before the pump. Ill do that and run it after my lift pump. I still have a 65 micron sediment filter that came with the lift pump anyway. Ill cut the paper filter up and post results on here anyway..

[scotty nm35]

Too fine and you will need to replace the filter element often. 40 micron seems perfect, fine enough to not block the injectors and coarse enough to not get blocked constantly.

I haven't touched my Proflow filters in 5 years and 100's of tanks of ethanol. I should check them I guess...

[Gareth87]

Sounds good to me. Ill run a paper filter before the lift for a while until the tank cleans out. My strainer on the pump was brown after the first tank so i guess there is a little rust in the tank..

[Gareth87]

Sounds good to me. Ill run a paper filter before the lift for a while until the tank cleans out. My strainer on the pump was brown after the first tank so i guess there is a little rust in the tank..