Looking what you guys suggest for a post bosch 044 pump filter? Car will have the stock pump feeding a surge tank and the 044 feeding the engine, what micron and element type is best for gasoline and E85 usage?

 

Contact Scott @ Kinsler. He hooked me up with some very nice monster filters for my setup.

 

I use the fuelab 10 micron filter. It has the AN fittings built into the filter so less fittings to buy and leak, not to mention pretty convenient to use.

 

With E85, I leave it up to the customer because there's a compromise either way...

Ideally, you'd want 10 micron, but anything 10 micron is going to have a paper element. I have friends running paper elements with E85 and experience no problems. One for example, has had E85 in his car for over three years without an issue. But, I do hear stories here and there about people having issues with paper elements breaking down with E85, which clogs the injectors.

IRL uses our filters with 20 micron paper elements for straight Ethanol, but they change them every time they run the car so there is no longevity issue. (They also run our 25 micron stainless filters for oil)

If you don't want a paper element, the finest filter we offer in stainless is 25 micron. You won't have any issues with steel in Ethanol or Methanol, or Nitro. for that matter, but you're sacrificing 15 microns worth of filtration. Is that a big deal? Probably not, but it's not OEM spec for any EFI injector which is why I make people aware. One bonus is that you never have to replace these elements, just clean them when/if they get dirty.

Surface area and pressure drop are the two primary factors that make a filter "good." The more surface area you have in the element, the more pores there are for the fuel to flow through, and hence, it takes less force (less pressure drop) to push fuel through it. Also, the more surface area you have, the more dirt you can trap before the filter becomes restrictive (and present an even greater pressure drop). Our 'small' paper elements are 108 sq. in. Our 'small' stainless elements are 74 sq. in. The 'big boys' have 216 sq. in. - they'll all trap a lot of dirt before they restrict.

You have some pressure drop with any filter simply because fuel molecules don't propel themselves through filters on their own, it takes force (pressure). It's easy to see for yourself if you're motivated enough; put a pressure gauge before and after your final fuel filter. On a totally stock fuel system, the fuel pump is doing about 45 psi worth of work to see 43 psi at the rail. Approx. 2 psi of pressure drop is average/common.

 

I'd recommend the fuel lab 6 micron micron fiberglass element. It can flow more than enough fuel and it will filter all the way down to 6 microns. It's compatible with e85, methanol, diesel, and gasoline.

 

I ran a 10 micron when I ran E85.