M1Lover

Want to install a pre filter in front of the lift pump. Familiar with Racor from old sailing dayz. Here's a nice unit: 45 GPH oughta do it, no?

http://www.adiesel.com/store/RAC-245R2.html

What do you guys think???

wannadiesel

I think that style is designed for the pressure side?

Have you looked at Davco filters?

http://www.davcotec.com/pdf/Diesel-F...ssors/5134.pdf

M1Lover

The Davco 232 looks like the one indeed. Thanx. I'll call them Monday to see where to buy one.
Now: Do you just leave the factory filter in place, knowing that no contaminants are going to hit it any longer (and it should last forever there) once the Davco is in place? Or do you get some block-off part? Where's the best location to mount it for ease of filter change? Do you run one? Thanx, H.

wannadiesel

Ideally you would use a good secondary filter in place of the stock filter/separator. Gotta have something between the lift pump and the VE.

An FF5461 would be a good replacement in the stock location. The other way to go would be to mount a standard truck size filter head remote from the engine and run a 2 micron secondary.

M1Lover

Where's a good place to buy the FF5461 and is it a 2 micron filter? THANX, H.

wannadiesel

Any place that carries Fleetguard filters should be able to get it for you.

It's not a 2 micron filter, I believe it's a 5 micron. The non-Stratopore version (FF5018) and competitor crosses are 10 micron. I do not know of a 2 micron that fits the stock filter head. Stock filter/separator is a 15 micron.

I would run a 25 or even a 50 micron in the Davco. A finer filter there will mean more frequent filter changes than necessary. Once you strain the big chunks out with the Davco, the secondary filter will still last a long time.

samiam4

Cat filters are 2 micron


It's a spin on filter, at best a bushing adapter would be needed.


M

Jim Lane

Any reason we cannot run a Wix 33528 filter with the appropriate head?

Also all of the Detroit’s had a nice Primary and Secondary filter mounting in one unit.

Here are some nice filters to drool over.
http://www.go2marine.com/category.do?no=13756

wannadiesel

That would be a great choice. The easiest way to do it would be to leave the stock filter/separator as the primary, then replace the hard line between the filter head and the VE with hose and AN/JIC fittings. Mount the filter head wherever it's convenient, then run the hoses as needed.

Bruce M

I run a 2 micron Racor filter prior to the LP and a vacuum gauge between the filter and the LP. With B100 a new filter will read 5", then after about 1500 miles it will start to move past 10" at freeway speeds. Also my pressure gauge after the LP will drop from 6psi to 3psi or just below. At that point I will change the filter on the side of the road and continue. Since I started using the 2 micron filter have never changed the OEM filter.
Wonder how long the 2 micron filter would last under pressure instead of vacuum?

Jim Lane

With the 2-micron filter pre lift pump I would be afraid that you might be starving the pump of fuel indicated by the 10" on your gauge.

It might be better to use a coarser Primary filter from your tank to the pump and then a 2-micron filter as your secondary filter.

A pump will always push through the filter media easier than it will draw through the same.

With a restriction in the filter on the suction side the pump would draw into a vacuum where as if it was on the discharge side the pressure would increase up to the regulated pressure and stop.

What is the difference in viscosity between the B-100 and regular #2 Diesel?

bgilbert

FS1232 is 25 micron, FS1221 is 23 micron fwiw. That is why some owners of old 12 valves went thousands of miles (50k-100k) never changed the fuel filter, then when they purchased a newer truck with a 10 micron or less filter rating they wonder why they're having fuel filter problems after say 10k miles. It clogs up a heck of a lot faster.

Bruce M

If I move my 2 micron from prior to the LP to after the OEM 23 micron filter (FS1221) a second pressure gauge would need to be added I think?
With one gauge between the 2 micron and VE and the second existing gauge after the OEM filter, the 2 micron should still plug first, but being under pressure will last longer.
As the 2 micron starts to plug the gauge after it will drop in pressure to the VE and the gauge after the OEM filter will start to rise above its normal operating pressure and approach shut off head for the LP.
What do you guys think or have experienced?

Jim Lane,
I don't know the viscosity of B100, but it is thicker and will gel around 32 degrees. I do notice a difference when the temperature gets down to around
40 degrees in Glendale. Runs great now at 85 to 90.

Richie O

I run a racor pre lift on my boat. I have had 2 this way. Racor then to lift pump then to secondary. Boats get alot of junk in the fuel. Both filters get changed every 150 to 200 hours. But these are low power engines. Only 165 horses. Mitusibishi 6D16 and Perkins T6.354M.

Jim Lane

Are you in the Glendale right outside of Pasadena?
I was beginning to think I was the only one left in Southern California.
Jim