Think twice about doing this. Way to much time is going into fitting AN6 lines. Well, perhaps under normal circumstances it would be okay. Not being well and having time off work has not meant any fast tracking on this. Instead it has meant, getting two weeks behind and now into the third week there’s been a couple of hours on Sunday and a couple of hours today doing some light duties. Well what is it you should perhaps think twice about doing? Going from push-on fitting to AN fittings. AN is a designation that originally referred to Army and Navy and are sometimes called “dash” fittings. The best short history was written by Carroll Smith in either Tune to Win, Prepare to Win or Engineer to Win. For AN6 the size is a reference to 6 x 1/16", and AN8 would be 8 x 1/16". The system is not as straight forward as it might initially seem. There are different options in hard line. In the flex line there are a couple of braiding variations and within those variations are rubber or teflon liners. So there is a gamut of fittings. It has been said in this thread before “beware Chinese and Aeroflow fittings”. Earls, Raceworks (just got some of these for the first time and seem okay), Speedflow and some Fragola (not their items that connect to hoses but some firewall breaches). Time is needed to attend to the required detail. There are no short-cuts, in this instance we are dealing with fuel. Below shows an EJ-DE fuel rail. The bolt on connection has had its ears/M6 bolt holes machined off, has been drilled out to 16.5mm and tapped for an M18x1.5 to AN6 fitting. So fuel gets to here from an under bonnet common Bosch EFI filter that takes screw in AN6 fittings. On the opposite side the fuel return had been added to the blanked off end for an M12x1 to AN6 fitting. Of course this goes to AN fittings on the regulator. Hard anodised lines go the the fuel pump carrier. This was a huge pain to set up. To discourage others from attempting this there will be no other pictures or info on any of this. Sufficent has been shared. If you must have a go, intelligent questions will be answered. There has been a lot of custom fabrication. If you have done this sort of work before, of course no one will hold you back. But if you haven’t done this sort of thing allow $500 of installed lines and fittings (more if you buy to many bits or the wrong ones), and you had better have the tools and comprehensive workshop (hoist or proper full ramps a plus). Prob no more info post until at least this weekend coming.
Good 90 fitting. A 90 degree Raceworks. Considered acceptable for this project and used in some spots. Not as good as Earls or Speedflow (these latter brands have nice internal finishes and are worth every cent).
Now a Chinese fitting. Note the thin section through the bend. They are prone to fracture. Like “stance cars” they are cool for the unititated observer, but damn dangerous in use.