Another weekend of working on the Ugly Duckling (thats my name for it) done and dusted. Heres some updates in chronological order.
Exhaust is painted and pretty much done. I kept the mufflers unpainted for now. Might paint them later.
Started on the oil return. Draining the oil here so I can take the sump off and have a look at the inside. In the grass of course
Luckily the weather is faaaaaaaaaantastic right now here in Aus.
Gonna weld the return to the sump here, in this fashion.
Also made a mount for the fuel pressure regulator which tucks it away nicely. Not finished (read: painted) yet.
You may notice I use studs + nuts instead of bolts for some fittings (like in this instance and the middle exhaust mount). I do this mainly when screwing into aluminium for a few reasons. One is because a stud can use 100% of the available thread in a closed-in boss, a bolt cannot use all of the available thread if it is to tighten properly, making the stud stronger. Secondly, when you tighten the nut on a stud, there is only longtitudinal friction acting on the aluminium threads, becuase the stud is not moving. If it were a bolt, there would be longtitudinal and rotational friction on the aluminium threads, making it much more likely to strip.
When inserting the studs into the aluminium, always use loctite on studs and you only need to hand-tighten them. I simply cut the heads off bolts to make studs.
KZScott, or anyone else who knows, exactly which bulkhead fitting should I use for the fuel return? I'd like to use 8mm fuel hose but that would be -5AN which is not very common. Also there is not much clearance when I lower the tank, which means Ill have to use a 90 degree fitting which narrows my selection further. Should I stick to 4AN? 6AN? Any help here is appreciated. Thanks.
Im thinking this http://www.ebay.com.au/itm/Speedflow...IAAOxyBvZTViJr
Combined with this http://www.ebay.com.au/itm/Speedflow...MAAMXQydtTNOzJ
Should work? Or is that not enough flow when combined with a beefy fuel pump? 6AN/10mm hose seems like it'd be overkill