DIY : PTFE line- tank to HPFP + inline fuel filter upgrade
- Thread starter Blaster3500
- Start date
You probably can, but that thing is more than just a filter. It also routes fuel back over the driveshaft tunnel to the LPFP side, fuel level sensor, etc. The filter is integrated and not serviceable if I recall.
Thats true, filter is not servicable. Its paper filter, after 50k miles is in very bad condition. I opened it at 50k, so I know it. You can bypass it quite easily, but you have to cut plastic housing. Filter housing has three outlets, one to hpfp and second to pressure regulator and third to venturi on driver side. Output from regulator leads to fuel pump bucket, over the driveshaft tunnel. Maybe I have some photos, I'lI try to find it. So you need 10micron filter and ideally aftermarked pressure regulator to eliminate this bottle neck and dirty filter. Also paper filter is not ideal for e85...
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For anyone interested, here are my 6AN PTFE with olive to 5/16 crescent locking EFI fittings that will hook onto the stock lines:
This eliminated a fitting by using just this one piece, instead of a 5/16 efi fitting to 6AN and then a 6AN female to PTFE hose end.
I could only find them from the Racetronix link posted earlier:
https://www.racetronix.biz/product.asp?ic=fit-p6qdf56cl
This eliminated a fitting by using just this one piece, instead of a 5/16 efi fitting to 6AN and then a 6AN female to PTFE hose end.
I could only find them from the Racetronix link posted earlier:
https://www.racetronix.biz/product.asp?ic=fit-p6qdf56cl
https://www.ebay.com/itm/Fuel-Filte...mBbaR-t:sc:ShippingMethodStandard!11428!US!-1
I wonder if its worth grabbing that and modifying it for science.
That looks really nice! I want to do more on my intank setup but my I can't find the desire to get in there. On the Z4 it is upside down under the car! Between the draining and laying under the car/open fuel tank, and the smell that permeates everything... ugh... no thanks
And yet BMW considers it a lifetime filter ... ?!
On any standard BMW this is a moron simple replacement job. On the E89 Z4, a total pain in the ass that makes replacing the usual log filters under the old BMWs seem like an oil change (also a pain in the ass). One has to jack the car up, drop the exhaust, pull the shield, drain the tank, pull the filter out of the tank (which will still drip gas, I guarantee it). As a bonus the tank is double hump - very hard to tell which side one is draining (ask me how I know) and Murphy's Law is in full play.
When I did my Fuel-It LPFP, I spent the $110 and replaced this filter with the service kit, even though my car had 30k miles. Don't place to do it again.
Filippo
Hard to say. PR is bulletproof, cap is from aliminium. Modified oem is cheaper, but plastic and not so sexy...
Bringing this topic back...
looking at the dual HPFP pumps from the S55, there are no filters.
Do the M3/M4 cars have a fuel filter somewhere else in the system?
looking at the dual HPFP pumps from the S55, there are no filters.
Do the M3/M4 cars have a fuel filter somewhere else in the system?
Not quite authoritative, but may be good enough - integrated into the HPFP.
https://www.ecstuning.com/b-genuine-bmw-parts/high-pressure-fuel-pump-fuel-filter/13517847204/
Filippo
Yep - says so right there.
Not sure what the point of a filter is if it really isn't protecting the pump and requires the pump to be replaced?
Maybe it is filtering it for the injectors and to heck with $2,000 worth of pumps?
You will more than likely lower your rail pressure if you did that without additional flow.
Great thread! I plan to do PTFE 6an from the pumps(dual 450s) all the way up to the hpfp. Let me know if anyone needs any pictures
i believe that someone said -8an would be too large to fit between the fuel tank and the body. Any opinions on this? I wouldn't mind going 8an, it shouldnt add much cost.
I run 8an kryptalon which is like 10an in size. I believe the upgraded lines from Fuel it are 8an
I believe the fuel-it lines are a 3/8"/6an. After pricing the difference I will probably step up to a 8an, however I cant locate a fitting for the connection to the HPFP
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