What is the maximum pressure for a banjo fitting.

[drivefast]

I am installing a fuel injection system on my 65 mustang. I would like to hide any indication of the modern upgrades. To do this I wanted to use fuel banjos to feed the injectors. So, the question I have is can I use the banjos with crush washers to feed the injectors at the required pressure or is the pressure going to burst the washer.

 

[ivymike]

you're talking less than 100psi, right? I haven't seen the specific fittings you're talking about, but if they're like what I'm imagining, I have trouble imagining them bursting at such low pressure.

 

[kenre]

Banjo fittings are used on brake calipers, the copper washers hold on fine in this application, presures around 1000psi.

http://www.retallickeng.com.au

Was told it couldnt be done, so
i went and did it!

 

[evelrod]

I used the standard banjo fittings on my much modded 83 T-coupe...Fuel pressure was only 45 psi or so, though. I used the standard fibre washers.

On the brake systems of both my race cars I replaced the OEM banjo fittings with AN fittings. Not because of any failure related problems but for ease of maintenance with braided teflon/steel lines.

Rod

 

[reidh]

Drivefast,

You can absolutely do this, but like evelrod stated, servicing AN fittings may be easier for future maintenance.

-Reidh

 

[fueliefan]

Many of the bosch external efi pumps are actually intended to be used with banjo fittings

 

[evelrod]

Yes, the T-Bird was a Bosch system. Never had a problem. However, pump service was simple as it was mounted, with adjacent fuel filter, under the floorboard by the RR passenger seat. I also used an adjustable regulator from a BMW with this car. Like I said, had I to do it again, I would opt for AN fittings. incidentally, this 2.4 + .040" engine was tested on the chassis dyno with 18 to 20 psi boost at 293 hp at the wheels! AND, it still got 22 mpg at fast freeway speeds.

Rod