How to fit drop-base 14x3 air cleaner on FiTech throttle body. - Hot Rod Forum : Hotrodders Bulletin Board
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Old 08-15-2019, 06:20 PM
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How to fit drop-base 14x3 air cleaner on FiTech throttle body.

I just thought I'd share what I did to fit a drop base air cleaner on my FiTech unit. There are perhaps better ways to do it, but this is what I did.
I was previously using a velocity stack type filter. It looks really cool, but the filter element is junk foam and drops bits into your engine. There is also a video out there from Roadkill or something showing that it actually chokes your engine a bit. I was using it because there were no clearance issues with the fuel lines. The car is a 1970 El Camino with a cowl induction hood. I think some cars out there would have hood clearance issues.
I tried a flat-base 14x3 filter and did not have room to close the hood. It probably would have worked fine if not the the throttle body spacer I have.
I ended up using banjo fittings for the fuel lines to get a drop base filter to work. Here are the sizes:
For fuel in:
Banjo fitting 9/16-24 to -6AN (EAR-977606ERL from Summit)
Banjo bolt 9/16-24 (EAR-SS997594ERL from Summit)
For fuel return:
Banjo fitting 10MM to -4AN (EAR-997641ERL from Summit)
Banjo bolt 10MMx1.25 (GDR-992-03-32CH from Summit)
-4AN to -6AN adapter (SUM-220221-N from Summit) I used this because I already had a -6AN connector on my fuel return line.
I used a Holley sniper drop-base with extra indents (HLY-120-510), but it doesn't seem to make a difference.
The air cleaner base still hits the raised fuel return portion of the throttle body, so I just threw an extra gasket between the throttle body and air cleaner base and it seems to solve the problem.
I would like to find or make a sticker/decal that says "fuel injected" or "E.F.I." or something with a '60s/'70s look to it to put on the air cleaner with the 327 sticker.
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Old 08-15-2019, 06:52 PM
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Please put a section of heater hose over those fuel lines zip tied where they are close to the head. If the lines soften and hose hits the head the heater hose will be sacrificed instead of the fuel line.
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Old 08-15-2019, 08:22 PM
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Good call. Thank you.
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