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-   General Q & A (https://www.offshoreonly.com/forums/general-q-20/)
-   -   Another fuel system setup question - fuel / water filter before or after mech pump? (https://www.offshoreonly.com/forums/general-q/326831-another-fuel-system-setup-question-fuel-water-filter-before-after-mech-pump.html)

MILD THUNDER 06-03-2015 11:56 AM
http://www.ebay.com/itm/New-Fuel-Fil...3f92cf&vxp=mtr

Mercruiser used the little screen ones like these

http://www.wholesalemarine.com/filte...-35-93568.html

Budman II 06-03-2015 12:08 PM
Originally Posted by MILD THUNDER (Post 4312717)
Yep, the little screen filters are what I have. You da man, MT!

ealesh33 06-03-2015 01:45 PM
Originally Posted by MILD THUNDER (Post 4312652)
Something else to consider. Micron ratings do not depict flow. You can have a 10 micron filter that flows more fuel, or say less restriction, than another brand/style 100 micron filter.

I dont have engineering numbers for you Budman, but all I can tell you, is I've been running 800HP blown with twin 850's, with a -10 line from tank to 33405 filter , then to the inlet of a six valve holley pump with a -10,, and #8 up to the carbs where it splits into 3/8 hard lines. I have friends with same setup that has supported over 900hp blown.

I think you'll be just fine with that setup on your 575hp N/A single carb engine.
That is correct, which is why aeromotive wants you to use their 100 micron filter with their pump. However comparing a 20 micron to a 100 micron, the 20 is going to be more restrictive.

delsol 06-03-2015 02:50 PM
I will be using holley 100 micron inline ss filters to Imco 6 port electric valves to Weldon 2025 electric pumps to FST 4 micron water/filter separators to fuel rail. In talking with FST they told me that the FST has no problem being in front of the electric pump and because of the area of the filter element it will support 1500+ hp. I am placing it after as more of a precaution if something fails with a pump ... the 100 micron will keep the crap from getting to the pump...

I hope...

Budman II 06-06-2015 10:29 AM
Originally Posted by MILD THUNDER (Post 4312717)
Well chit, I picked up some of the little brass inlet filters with the springs, but they will not fit behind the AN style fuel line inlets with the braided lines. I would have to find something shorter, or switch to the hard lines. Neither appears to be a viable solution at this time. Perhaps some type of cartridge filter inline right before the fuel pressure gauge. Might have to wait on that one because I want to fire this mother up this weekend.


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