Fuel Pump & Filter

[toro618]

Originally Posted by Indy Unlimited

Lets not forget where the crap is coming from.
The stock fuel lines and stock fuel pump is a major contributor to the crap in our stock filters.

So you think the oem fuel line is deteriorating internally, and all the crap is getting trapped in the filter?

[vintagerider]

Originally Posted by Indy Unlimited

Lets not forget where the crap is coming from.
The stock fuel lines and stock fuel pump is a major contributor to the crap in our stock filters.

My exp is only with the big boxers but this is what I know...
- the crabon evap kanister is the source of much crap in the system, disconnected and vented tank naturally to atmosphere, had to jumper the vacuum ports which is easy.. ++ tank should have neither pressure nor vacuum

-10 micron f.i. rated filter is important, can not just fit any filter that fits

- WIX 33323 is a good 10 micron filter for boxer. Inlet and outlet on same side increases mounting options. Fittings are slightly larger than 5/16" but maybe can use reducing barb or get something similar w/smaller barbs

- do not flush old filter and re-use because injectors cost way more than installing new filter Back-flushing is for emergency only.

- heat soaking by external filter needs to be avoided- will alter fuel/air ratio, install away from heat sorces. On boxer best place is under front frame or under seat or to the rear. There are thermal jackets (loose outer tube) available for fuel hose that also increase abrasion resistance.

- BMW fuel hose, like most oem isn't very good. Check with hose specialist for 10% ethanol compatible hose. Pressure only needs to be 65 psi. Low cost option is black nylon tube. Needs to be soaked in hot water to form bends

- change the pump suction sock every time you open the tank. Universal ones are available cheap at auto stores. Need to have old one with you to match up pump fitting- they just press on.

- avoid using components, hoses, filters, laps that are not f.i.rated a leak-free system is easy to achieve if you use the correct materials and methods

most of the above is general advice that any f.i. shop will give. The pump and plumbing issues are same as with autos

> screw the oem bike manufactures and their $500 unitized assemblies. not making fuel filters readily available is unethical

[JRWooden]

Originally Posted by Indy Unlimited

Lets not forget where the crap is coming from.
The stock fuel lines and stock fuel pump is a major contributor to the crap in our stock filters.

Indy:
Yes ... I am afraid you have a point there ...
I really really REALLY ... did not want to add "German Engineering" to my list of fallen heros ...

Sigh .............someone send me a couple of cases of Warsteiner Dunkel to help me forget my pain?

[ebrabaek]

Originally Posted by JRWooden

Indy:
Yes ... I am afraid you have a point there ...
I really really REALLY ... did not want to add "German Engineering" to my list of fallen heros ...

Sigh .............someone send me a couple of cases of Warsteiner Dunkel to help me forget my pain?

So how about making it like an auto system. I mesh screen at the pump pickup...then install one of these filters between the pump and injectors..... I think the pump will handle tiny particles fine, and the filter will stop them prior to the injectors.

[LukasM]

Originally Posted by ebrabaek

So how about making it like an auto system. I mesh screen at the pump pickup...then install one of these filters between the pump and injectors..... I think the pump will handle tiny particles fine, and the filter will stop them prior to the injectors.

That's exactly how it is now. Only problem is that BMW doesn't sell the elements by themselves, and they are not as easy to replace as an external filter.

[JRWooden]

Not having seen it taken apart I'm unclear on the details ...
When bypassing the internal filter, how are folks running the fuel line from the pump outlet to the part that BMW calls the "feed pipe" (the plastic elbow that gets inserted in the outlet side of the OEM filter and comes out the top of the tank). The feed pipe has an o-ring on its outer diameter that slides INTO the outlet end of the filter right?

Can a piece of hi-pressure tubing just be slipped up over that (internal) end of the elbow and secured with a worm-gear clamp?

[toro618]

Another option

http://www.cvproducts.com/Products.a...ch=fuel+filter

[ebrabaek]

Originally Posted by LukasM

That's exactly how it is now. Only problem is that BMW doesn't sell the elements by themselves, and they are not as easy to replace as an external filter.

I had that all wrong then... I thought we were discussing a filter on the intake side..... Thanks Lukas.... I'm with it now...

[C5!]

Just installed the new fuel filter. It is a Golan mini with 1/4" barbs. S/S 10 microns.
here installed below the seat


Here the filter with the key for judging the size



and inside:

the filter is S/S and washable



here the Golan link: http://www.golanproducts.com/filters.html

If I would do it again I would buy the Super-mini, it is the same filter in a still smaller housing...

---

				Mini and Super Mini Reusable Filters Form and function After success with our first fuel filter, we at GS Performance made a decision to manufacture new fuel filters for the High Performance Motorcycle and Go Kart Industries, and today we have the best billet, stainless steel, washable, reusable and performance fuel filters in those two industries. Filter Element: Designed and engineered for the aerospace industry, for rugged, high temperatures, and extreme filtration environments, made of pleated, 304 stainless steel, 10 micron (.000392"), 1.000” Diameter. Totaling four square inches of effective filtration area, mini/super mini filter provides a maximum flow of 6 gallons per minute simultaneously with no restriction. Filter elements are washable and reusable indefinitely, cleaned easily with air or soluble rinse. Bodies: Machined on CNC from 6061 aluminum, chrome plated or clear bright anodize finish. Specification:
		Mini Fuel Filter Part Numbers 60-04AN 4-AN Fittings 60-06AN 6-AN Fittings 60-250C 1/4 Barbed Fittings 60-312C 5/16 Barbed Fittings 60-375C 3/8 Barbed Fittings Super Mini Fuel Filter Part Numbers 70-250G 1/4 Barbed Fittings 70-312G 5/16 Barbed Fittings
				Length: Mini: 1.500" long, not include Barbed Ends. Super mini: 0.675" long long, not include Barbed Ends Diameter Mini and Super Mini: 1.375" Weight: Mini: 1.5 Ounces / Super mini: 1 Ounce Sizes in barbed: Mini: 0.312" (5/16), 0.375" (3/8) Super mini: 0.250" (1/4), 0.312 (5/16) Sizes in AN fittings: Mini only: 4-AN, 6-AN, 8-AN

[JRWooden]

Looks good ... what is rough cost?

[C5!]

Originally Posted by JRWooden

Looks good ... what is rough cost?

$56.13, free shipping.

[JRWooden]

Originally Posted by C5!

$56.13, free shipping.

Thanks ... that's "in line" with competitors...........

[rjudge]

I'm having a hard time finding anyone that has the 1/4" barbed super mini in stock. Anyone find a source?