A properly designed port manifold fuel filtration system is comprised of staged filters. A 100 micron filter element should be installed between the tank and the pump and a 10 micron filter element should be installed between the pump and the injectors.
The DW in-line filters are available in 3 canister sizes. Larger canister sizes provide less flow restriction and increased service intervals. Small canister sizes provide a more compact installation. Flow restriction data is available on the product tech pages.
One pore size is not better than the other. Different micron ratings are required to protect different fuel components. As a rule of thumb: 100-micron for fuel pumps, 40-micron for carburetors, 10-micron for manifold injectors, and 5 micron for direct injectors.
If the in-tank pump is fitted with an adequate pre-filter (filter sock), then a single 10-micron filter installed before the fuel injectors is all that is needed.
Bosch recommends a filter element with a mean pore size of 10-microns for port manifold injection. Using a smaller mean pore size will introduce an unnecessary restriction in to the fuel delivery system.
Per the Bosch Automotive Handbook (9th edition 2014) “The required filter fineness is dependent on the fuel-injection system. For systems with manifold injection, the filter element has a mean pore size of approximately 10-microns. Finer filtering is required for gasoline-direct injection. The mean pore width here is in the range of 5-microns”. The vast majority of high performance fuel systems utilize manifold injection and therefore, a 10-micron filter element is appropriate.
Yes, all DW in-line filters feature stainless and anodized aluminum internals and are e85 compatible.
Diesel fuel systems have different filtration requirements than gasoline fuel systems. The DW in-line filters were designed specifically for gasoline fuel injection systems.
The filter canisters have female –8AN ORB ports. Larger, -10AN ORB endcaps are available upon request.
To minimize cost and maximize flexibility, fittings are sold separately. DW offers fittings to adapt the filter port to a male 3/8 barb, male 5/16 barb, male -6AN, male -8AN, or male -10AN.
Yes, DW in-line filters are superior to typical OE fuel filters. Upgrading to a DW filter will usually result in decreased fuel flow restriction, increased service-interval, and longer fuel system component life.
The required service interval will depend on filter volume and fuel contamination. We recommend a service interval of 12-months or 12,000 miles.