Meph Posted September 13, 2009 Share Posted September 13, 2009 Hey guys, curretnly I have a mesh style 1.5" ish diam. fuel filter coming off my tank. I plan to drive the car regularly and would think this filter woudl let contaminants through to the injectors. I have an MSD pump, likly cableable of flowing much more fuel than I need so would there be any harm in install one of the simple in-line $10 steel canister fuel filters before the pump? Quote Link to comment Share on other sites More sharing options...
Oddjob Posted September 13, 2009 Share Posted September 13, 2009 Yes, you can, and probably should. You don't say what sort of induction you have, or your engine size/modifications, so it's hard to be specific as to sizes. I run a 100 micron filter back by the tank, ahead of an electric pump, and a 40 micron filter up front, just ahead of my SUs. You might want to go with a 10 micron filter for injection. Quote Link to comment Share on other sites More sharing options...
MAG58 Posted September 14, 2009 Share Posted September 14, 2009 Yep, also agree. I run a little high flow filter to get all the big crud out of the line before it goes into the pump, and then I have a much finer filter in the engine bay before it goes into my carbs. It *shouldn't* affect your flow enough to make a difference and your injectors will thank you. Quote Link to comment Share on other sites More sharing options...
Meph Posted September 14, 2009 Author Share Posted September 14, 2009 Ive got a 1jz swapped in, but ive only ran it for maybe 30 minutes total with the one filter. Ive got hard lines running the entire length to the engine, so would I be able to place the filter right after the pump? Also,is there any real specifics for filters or can I head to the auto store and get one with the right size fittings thats specified for an EFI car? Quote Link to comment Share on other sites More sharing options...
Oddjob Posted September 15, 2009 Share Posted September 15, 2009 Generally, the aftermarket filters from reputable speed shops and performance manufacturers will give you better performance and longer life. They are also often servicable, rather than throw-aways. The auto-parts-store filters, particularly the off-brand ones, are of variable quality. Lastly, the performance filters come with specifications stating flow, particle size filtered, and so on. You are unlikely to find that on a parts counter model. Quote Link to comment Share on other sites More sharing options...
WizardBlack Posted September 15, 2009 Share Posted September 15, 2009 Typical rule of thumb, to summarize what they have said, is use a coarse filter before the pump and a finer filter afterwards. The pump can deal with substantial particles, but the injectors cannot. However, most pumps won't deal with the restriction of a fine filter before it. Most pumps can push fuel out pretty hard core, but won't suck stuff up worth a crap by comparison. Most good filters are rated by a micron number; which is simply the size of the smallest particles they are made to stop. Look up Aeromotive filters for an idea. The higher the number, the coarser the filter. Quote Link to comment Share on other sites More sharing options...
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