I am still new to this whole thing, but i was wondering what exactly banjo bolts do? Do they increase performance at all? I believe they allow for more fuel to be delivered but i am not positive. Why would someone want to upgrade their banjo bolts? All information about banjo bolts welcome. Thanks for you help.

 

banjo bolts are a restriction--especially the stock ones--

you can buy ones that have been opened up--have larger orifices in them to allow better flow--

or you can buy some AN type fittings which are the best at letting fuel flow--chris

 

Maybe, but the question was... will they increase performance? I can see where they might help if there have been any fueling mods, etc., but will they make any difference on a stock truck?

 

stock banjo bolts are a retstriction---

new ones are available that are less restrictive--will the new ones help in perfomance--what kind of performance---letting fuel flow more freely--yes it will help that, but not sure what that will get you out of a stock truck--a modified truck it will help even more as they demand more fuel--it may help to keep the fuel a little cooler which would help the VP44 also--chris

 

Maybe another point is that the truck comes stock with banjos - and as C says, very restrictive. Several vendors carry better ones that help performance above stockers, but the end all be all is to remove them completely and replace with AN fittings, as C says...

Matt

 

I doubt you would see a "performance" gain by putting banjo's on a stock truck. I didn't. It may let your lift pump live longer by keeping the relief valve from beating itself to death.

 

True, performance in this discussion should be in terms of the fuel delivery system - ie lift pump happiness!

Matt

 

so would you recommend putting new banjo bolts on a stock truck or do you think it would be wise to spend that money on something else? Thanks for you help.

 

Are there any kits available for conversion to AN fittings?

 

Give Rod a call at www.wildcatdiesel.com . He's got a conversion kit that also increases line size and pressure.

 

Simply replacing the banjos will do nothing. The trick is replacing the STOCK banjo bolts with ones that have been modified with larger orifices so they flow more fuel.

The largest orifice is the AN fitting, though. This eliminates the banjo-style bolt entirely, and replaces it with an AN or JIC style fitting (37° flare).

Justin

 

You could put the bigger banjo bolts in place of the ones you already have, but you will pretty much only be preventing lift pump failure by letting the fuel flow better. No performace gain at stock HP levels, but if you do increase HP you will already have higher fuel flow than stock, which helps in general.
If it were me, id spend the money on something else.
Or if youre set on high fuel flow, just go with the AN fitting style kits as mentioned above and get it over with, for max fuel flow.

 

I've had good luck by just drilling mine with a 3/16 bit and deburring real good. Stock pump on the frame rail with AN fittings and banjo bolts the rest of the way. 15psi idle and no lower than 11 psi wot.

 

I have this one in the classifieds.

Ryan's Fuel System

 

I bought the larger BANJO bolts & achieved absolutely NOTHING. It is true they have larger holes, but the real problem is the skinny lines in the whole delivery system. I have replaced mine with the same fittings that come in the WILDCAT HIGH FLOW KIT. Hands down this is the best way to go, no matter where you get the fittings from. I had a message flash on my odemeter after installing these with the half inch fuel line. the message was "THANK YOU, I WON'T LET YOU DOWN AGAIN". It must have been sent by the genie in my LIFT PUMP. If you just got to have the larger banjo bolts, just drill yours out with the 3/16 bit. Get you a good bit, as these bolts are made out of some hard stuff. On my truck, the bolt going into the VP44 already was larger than the others, so don't mess with it, if yours is like that. Mine was shorter too, than the other four. BIGGER fuel lines is the key here.