Filter Head Banjo Bolts

[radixr]

I have been trying to give Ray T. enough information to make Hi-Flow banjo bolts for 12-valve engines but I am puzzled about the banjo bolts in the filter head. The inlet banjo is a double banjo setup, i. e. , a small banjo is mounted on top of the main banjo. What is this smaller line for?



The outlet banjo has a small screw in it that my Customized Parts Catalogue labels as a "Captive Washer Cap Screw". Does this small screw do anything besides plug up the hole in the head of the outlet banjo?



TIA, Dave



I should have looked more closely at the other banjo bolt thread on this forum. HEMIdart describes the small line as the injector return line and the small screw in the outlet banjo as an air bleed screw. Is this correct?

 

[drawson]

The outlet side small screw is the air bleed screw. I have also taken it out to get my fuel pressure reading (temporily).

 

[HEMI®Dart]

radixr



I just finished modifiying my Bango bolts. A piece of cake. VERY EASY. The whole job took maybe an hour.



It may be more aggravation for Ray making new ones than its worth. All 3 Bango bolts are different.



The lift pump to fuel filter head bango bolt has a 13mm tapped hole in the head of the bolt for injector fuel drain manifold 'mini' bango bolt that screws into it.



The fuel filter head outlet to injection pump bango bolt has a 10mm tapped hole in the head for a plug to bleed air from the lines, or to screw in TST's adapter for a pressure gauge.





I did what drawson did to the bango bolts. I drilled the holes out to 3/16" reamed and chamfered them. The stock holes are small and look quite restrictive. The hole that goes thru the bolt (vertically) is quite large. I didn't bother touching that. The bolt looks like a different one when you are done.



I didn't bother drilling the bango bolt that is on the injection pump. There are 4 good sized holes already. My 3/16" reamer passed thru them with plenty of room to spare.





My idle fuel pressure didn't really change. My 2500 rpm no-load reading went up 1 psi.



Driving around town is where I noticed a decent fuel pressure increase. It seems I now get 2-3 psi more fuel pressure throughout the 1200-2200 rpm range. I haven't put my foot into it yet, so not sure about increased performance.



Overall it seems like a decent inexpensive mod.



I can post the sizes of wrenches & sockets if anybody needs it.

 

[drawson]

Hemi, tell me about the one I haven't done yet the banjo from the lift pump. Is it as increasable as the one going to the injection pump.



All I did to the one at the injection pump was chamfer and deburr it.

 

[HEMI®Dart]

Yep,

It has the same small sized holes in it as the filter head Bango to injection pump.