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Advanced Discussion - 7.3L Powerstroke Performance Advanced topics related to the 7.3L Power Stroke Engine

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  #1  
Old 10-25-2011, 11:45 AM
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Default Banjo bolts?

Wonndering what everyones take is on the banjo bolts from strickly diesel, are they worth the money and effort? Im running mike's 350/200's so I would think I need all the fuel flow I could get.
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Old 10-25-2011, 01:18 PM
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It can't hurt.
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Old 10-25-2011, 01:33 PM
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Yeah, in this case more is better I guess.
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Old 10-25-2011, 03:05 PM
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Are you dropping fuel pressure under wot?
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Old 10-25-2011, 05:26 PM
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I still have stock fuel system. I was dropping pressure with 238's. Going to be running 2 stock pumps, with reg return, all 3/8s line with 5/8's pickup.
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Old 10-25-2011, 06:34 PM
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Originally Posted by Powersmoke_sd View Post
I still have stock fuel system. I was dropping pressure with 238's. Going to be running 2 stock pumps, with reg return, all 3/8s line with 5/8's pickup.
so then why do you need any banjo bolts then?
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Old 10-25-2011, 07:32 PM
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Im building my fuel system as we speak. I want to know if I need the banjo bolts or not so I can order them and do them when I do the rest of the fuel system.

Besides the 1/8in ports in the heads the banjo bolts are the next restriction in the fuel system, right? Kinda why I was asking.
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Old 10-25-2011, 07:37 PM
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Originally Posted by Powersmoke_sd View Post
Im building my fuel system as we speak. I want to know if I need the banjo bolts or not so I can order them and do them when I do the rest of the fuel system.

Besides the 1/8in ports in the heads the banjo bolts are the next restriction in the fuel system, right? Kinda why I was asking.
Im really not sure how the SD is setup exacxtly.... but from the back of the head just run 3/8" line to a conjunction or a T. Then you run your feed line into that T.

Return from the front of the heads into your regulator and back to the tank
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Old 10-25-2011, 10:08 PM
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Mine is going to feed from the front, come up from back to the reg then back to the tank.
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Old 10-25-2011, 10:22 PM
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Originally Posted by Powersmoke_sd View Post
Mine is going to feed from the front, come up from back to the reg then back to the tank.
Alright so just take that and reverse it then, its the same either way.
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Old 10-25-2011, 11:35 PM
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So back to the original question, will I need banjo bolts or not?
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Old 10-25-2011, 11:50 PM
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Quote:
Originally Posted by Powersmoke_sd View Post
So back to the original question, will I need banjo bolts or not?
Maybe i missed your point... but honestly where are the banjo bolts going to go? What are you using them for?
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Old 10-26-2011, 12:00 AM
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They can't hurt. Do they have the fuel line attach straight to them so the fuel has a straight shot into the head? Or are they just drilled out to allow more flow but still use the 1/8" port?
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Old 10-26-2011, 12:05 AM
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Can i see what you guys are talking about, I hate to sound stupid but im lost here.

Anyone have a link?
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Old 10-26-2011, 01:32 AM
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They can't hurt. Do they have the fuel line attach straight to them so the fuel has a straight shot into the head? Or are they just drilled out to allow more flow but still use the 1/8" port?
They just have fuel going through them. They are bigger to allow more flow. I had a set of stock bolts that I drilled out, but they grew legs and I can't find them anywhere. So I was just going to order a set.
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Old 10-26-2011, 05:57 AM
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I really don't see it to be necessary to buy banjos. If your loaded and got money to burn, then go for it. If you do two sd pumps, split and do one too each head?
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Old 10-26-2011, 08:59 AM
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I really don't see it to be necessary to buy banjos. If your loaded and got money to burn, then go for it. If you do two sd pumps, split and do one too each head?
I think that would suck if one pump failed for some reason? Unless I'm thinking about it wrong
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Old 10-26-2011, 10:52 AM
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Should be plenty of fuel if they only feed half as many injectors..... Wouldnt a failure suck regardless of the configuration?
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Old 10-26-2011, 11:03 AM
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Pardon me for sounding supid but aren't they installed in the return? From looking at the installation instructions I'm not sure...
why not ask Dennis his input?
I would think a larger supply line would be more beneficial for that size injectors. Specially if you are running dual pumps.
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Old 10-26-2011, 01:14 PM
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The point of running 2 pumps is to increase volume, and bring down the duty cycle of each pump.

The tank pickup to pre pump filter is 5/8's. From there it splits to 2 3/8's lines one to each pump. Each pump has a post pump check valve(in case one pump fails it will make it home). From there it goes to a post pump filter, back to 1/2" line to a Y block with 3/8's feeding the front of the heads and returning from the rear.

So besides the 1/8 ports in the head the banjo bolts are the next smallest ports in the heads before the injectors.

For those that don't understand the banjo's purpose, it is where they bore through the head to get the fuel to the injectors(like an internal fuel rail). Then they drill the heads down to those ports(the 1/8" factory feed line ports). So the banjo is in the head to direct the fuel since they can't cast the head with the fuel rails already drilled.

The hoes in the banjo are small, dennis's bolts are opened up quite abit more over stock. Im ordering them cuz they make since to me!
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Old 10-26-2011, 01:42 PM
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I drilled my stock ones.The metal is very soft so it pretty simple to drill the holes larger.I couldn't tell you if they work better or not since my engine is still on the stand.I do run a strictly diesel regulated return fuel system on my truck now and don't have any issues with fuel pressure for stg2 singles.
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Old 10-26-2011, 01:52 PM
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Good to know. I had another set out of my core motor that I drilled out bigger than what dennis's are but can't find them anywhere. So I was just going to buy another set.
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Old 10-26-2011, 04:26 PM
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Thats what I say why not drill em? I can buy a lot of drill bits for 100 bucks.
My Question is this!> What passage in the cylinder head are these located.? The pressure side? Return? I read the installation instructions at StrictlyDP is what makes me wonder. After looking at the pics I mean...
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Old 10-26-2011, 04:44 PM
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I plugged the 1/8" NPT inlet holes in the head and made my own fuel rail banjos out of the fuel rail plugs in the back of the heads brazing an AN-6 thread male part of a steel AN-6 male fitting to the fuel rail plug; then drilling out the fitting and plug on a lathe. Used a close bend AN-6 female/AN-6 hose fitting from Aeromotive to make up to the plug in the rear of the head. Works OK for me.

Otherwise, Diesel Innovations sells these for about $20 each.
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Old 10-26-2011, 05:18 PM
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Quote:
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Thats what I say why not drill em? I can buy a lot of drill bits for 100 bucks.
My Question is this!> What passage in the cylinder head are these located.? The pressure side? Return? I read the installation instructions at StrictlyDP is what makes me wonder. After looking at the pics I mean...
They are in the front and rear of the heads. If you look at the rear of the motor they are almost behind the up pipes. Same spot in the front, you can't really see them because of the accessory brackets.

The only problem with drilling them out is if you go to much you risk breaking the bolt off in the head when torquing them down.
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Old 10-26-2011, 06:05 PM
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Yeah, I saw the pictures. I still am not convinced that this helps one bit with fuel delivery.
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Old 10-26-2011, 06:11 PM
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So at what point are the stock ones a problem?

I have 250/200 and using all 250cc's with one walbro pump, and i dont ever drop a single psi under WOT
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Old 10-26-2011, 07:03 PM
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Quote:
Originally Posted by strokeorcroak View Post
So at what point are the stock ones a problem?

I have 250/200 and using all 250cc's with one walbro pump, and i dont ever drop a single psi under WOT
Mine never drops a single psi either,

That being said I don't believe there is a supply problem if the pressure never drops. So why all the monkeying around?
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Old 10-26-2011, 07:20 PM
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I plugged the 1/8" NPT inlet holes in the head and made my own fuel rail banjos out of the fuel rail plugs in the back of the heads brazing an AN-6 thread male part of a steel AN-6 male fitting to the fuel rail plug; then drilling out the fitting and plug on a lathe. Used a close bend AN-6 female/AN-6 hose fitting from Aeromotive to make up to the plug in the rear of the head. Works OK for me.

Otherwise, Diesel Innovations sells these for about $20 each.
That's how it's done!
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Old 10-27-2011, 03:28 AM
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If the fuel lines don't attach to the banjo bolts and bypass the 1/8" pipe fittings then I wouldn't bother buying them. Just drill out your stock ones and run them. I'd only do different banjo bolts if the fuel fittings are attached directly to them.
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Old 10-27-2011, 05:37 PM
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The bolts I'm refering to are the rear fuel rail plugs adapted to hook up to AN-6 braided line. And drilled out to a larger internal diameter than the stock 1/8" npt fuel fittings on the intake side of the heads.
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Old 11-01-2011, 12:31 AM
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Quote:
Originally Posted by 1snotrocket View Post
I drilled my stock ones.The metal is very soft so it pretty simple to drill the holes larger.I couldn't tell you if they work better or not since my engine is still on the stand.I do run a strictly diesel regulated return fuel system on my truck now and don't have any issues with fuel pressure for stg2 singles.
I was thinking of getting them for my build also. But Jody told me to just drill out the stock one's. So what size drill bit do I need to use?
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Old 11-01-2011, 10:31 AM
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I read 1 size bigger, if you really want to chance it 2to sizes.
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