Fuel filter flow rate

[Billman]

Dr. Lee

A current topic in the 6.5 section has peaked my interest in replacing the stock fuel filter housing with a smaller micron rating filter assembly.

It happens to be a Racor R15 series. It is capable of flowing 15 GPH. It has 1/4" NPT threads.

Will this be too restrictive?

[ 12-07-2004, 05:09 PM: Message edited by: Billman ]

[tom.mcinerney]

Not to interrupt, but the hose from the OEM fuel filter assy to the FIP on mine is 1/4" [although the line from tank to filter is 3/8", and return to tank 5/16".

[Billman]

That's what I thinking too, Tom.

It might be restricted by I.D. of the inlet hose. I'm not sure if it was 1/4 or 5/16. I know it isn't 3/8.

I have a Racor R15 with a 2 micron element laying around. If need be, I'll buy a 30GPH Racor and still use a 2 micron. I want to eliminate the stock housing.

Thanks.

[CleviteKid]

15 gph can support about 200 horsepower. I would go with the 30 gph to have some margin for restriction in the filter just before you change it out.

Dr. Lee :cool:

[Billman]

Thanks Doc.

What math did you use for GPH vs. Horsepower?

[jspringator]

Billman:

Where do you plan on putting it? I have a Racor 645 with a 30 micron filter right before the lift pump. I guess you could put it right after the lift pump, couldn't you? They are pretty easy to mount on the frame.

[NH2112]

I used my factory Model 80 filter as the primary, with a 2-micron Racor 645 as a secondary. The primary was originally before the lift pump, but the trouble priming the system led me to change that. Plus, I figured a diaphragm pump is pretty much immune to anything that could possibly get through the sock in the tank.

[Billman]

James

I was going to mount the filter before the lift pump on the chassis rail.

[tom.mcinerney]

Billy-
I moved my filter between the tank and the lift pump. Then after reading about dealer complaints of 'metal particles' in the FIP [and after finding quite a few sand grains in the FIP inlet screen] I decided to add a $5 inline disposable cannister filter (like on gasser pre-carb) between the LP and the FIP, as a fail safe {which might preserve my FIP if the LP degrades/disintegrates).

[Turbine Doc]

Bill go to the RACOR site http://www.parker.com/racor/pdf/Section01.pdf

I based my choice on their tech data I went with a 460 series (60gph) as overkill and reduced restriction flow, the 445 (45gph) is adequate but as I have lofty goals of max Hp as I can get someday 18:1 maybe beefed up AM Gen block twin turbos, (arh arh arh MORE POWER) went with more is better approach.

Difference in 400 series Racor vs 600 series is priming bulb pump 400 have them 600 does not I like to prime after a filter swap so I went with 400 again maybe another overkill item.