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Thread: Suggestions for fuel filter
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01-09-2007 #1
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Suggestions for fuel filter
OK I am looking for a fuel filter that is -6 AN male fittings on each end & is for aLT1 motor. Now my question is this: What micron rating filter should I look for? I have seen everything from around 25 to 100.
Thanks,
Scot
86 Monte SS
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01-09-2007 #2
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depends on where it's located and whether for carb or EFI. On EFI I use a 100 micron pre-filter between the tank and pump(s) and a 10 micron after the pump before the rails. Do not swap them!
Originally Posted by Samckitt
Jody
01-09-2007 #3
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The pump is in the tank & it is for a fuel injected LT1.
Scot
86 Monte SS
01-09-2007 #4
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go with a 10 micron or similar filter for EFI between the tank and fuel rails. Originally Posted by Samckitt
Jody
01-09-2007 #5
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I run a stock TPI style with saginaw to -6 fittings on my car (Gasket and Earls sells them). Cheap and I've had no issues at 630 HP or so.
01-09-2007 #6
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The stock filters are very nice. The aftermarket filters may look great, but most are PsOS! I had a filter on my GTO, the brand I won't mention. It looked great. I checked it with only 3K miles on it and the filter element was actually collapsed inside the housing. Fancy piece of billet crap. Originally Posted by Doug F
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01-09-2007 #7
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Doug, I have one of the Saginaw to -6 fitting & I thought it looked restrictive. The one I have, the ID of the fitting is about .25" & it looked like the O ring fit inside the ID of the filter & not seal against the shoulder as the factory GM bump flare would with the O ring. In the picture you can see standard 3/8" line compared to the Saginaw to -6 fitting.
Scot
86 Monte SS
01-16-2007 #8
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All I can say is I have no leaks and at most a 1 PSI drop from no load to WOT as seen going through the traps at 630HP...
If you look at the outlet sizes of a walbro 255LPH pump you see very small orifices.
Take apart a "2000HP" Weldon pump and it has very small orifices as well.
These "small orfices" have no/short length associated with them.
When it comes to restrictions, what I don't like is non-swept 90's and banjo fittings.
I wouldn't want to see the small orfices on the inlet though...
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