sparrow Posted June 13, 2022 Share Posted June 13, 2022 (edited) Sorry for having to ask what should be a simple enough question to answer myself, but the more I researched the more conflicting information I've run across. I can't drive my Z back home until I get this part, and it's overstayed it's welcome. I need to find out the correct barbed fitting size for the intake side of a stock 78 280Z fuel pump, so I can buy the correct m18x1.5 x ?? size fitting for this universal pump. I'm not even sure if I need the part or not because I don't have access to the car ATM without driving a 60 miles trip, and I'm not sure if the pump I put on there 6 years ago uses a universal fitting or not, so before I make another trip out there I need to get the fitting just in case. If I had immediate access to the car I wouldn't be asking, I know some people get upset over "stupid questions" so sorry about that. I just kept finding different answers to similar questions about the hose ID or fitting size, from 3/8", 7/16", 10mm. They are all similar answers from forums I searched so I'm hoping someone knows for sure exactly what the stock size is supposed to be for the fuel pump intake barbed fitting, the universal fuel pump I bought didn't come with any intake fitting. I also read that the fitting was oversized, and that some have asymmetrical hoses with one side bigger than the other? My best guess would be 7/16, but if it's actually 10mm which would make sense then I want to get that. I've uploaded a picture of a similar pump with the kind of fitting I'm trying to size installed, I just need to know for sure what size barb to get. Thanks for the help. Edited June 13, 2022 by sparrow first image actually uploaded, so I deleted the copy Quote Link to comment Share on other sites More sharing options...
sparrow Posted June 13, 2022 Author Share Posted June 13, 2022 (edited) The only sizes I'm finding on ebay for this size fitting are 1/2" and 3/8", 10mm, and 12mm but no 7/16" so far. From what I can find the inlet has to be 7/16", thats what the fuel hose ID is from the tank to the pump. I guess 12mm is closer to 7/16(11.11mm) than 1/2(12.7mm). I guess that will work? Edited June 13, 2022 by sparrow Quote Link to comment Share on other sites More sharing options...
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