Hotrodtractor
Moderator
I'll put in another vote for making a new banjo bolt fitting for the back of the heads. I have done a few trucks that way now. It is tight, but I'm not a fan of NPT fittings at all... so I try to eliminate them when possible.
Fuel distribution to back of the heads
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smokinstroker92
Member
What is the size of the current fitting in the head at the fuel rail plug?
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Sent from my EVO using Tapatalk
m j
Active member
Freightshaker
New member
Little confused here but it doesn't take much lol. The fuel fittings on the head are 1/8"npt right, are you guys talking about converting those to a different fitting?
Hotrodtractor
Moderator
I take these fittings in this picture I just borrowed from the post above you:
Then I weld an AN fitting to them and drill out the center for flow - then just plug the 1/8NPT fitting holes that are normally used with a pipe plug. Diesel Innovations also sold new custom fittings at one time to replace these and do the same thing that I describe. I'm not sure if David Lott still has them or not.
Freightshaker
New member
I take these fittings in this picture I just borrowed from the post above you:
Then I weld an AN fitting to them and drill out the center for flow - then just plug the 1/8NPT fitting holes that are normally used with a pipe plug. Diesel Innovations also sold new custom fittings at one time to replace these and do the same thing that I describe. I'm not sure if David Lott still has them or not.
Ok thanks! I wasn't aware there were other fittings to use on the back of the head. I assume that isn't necessary if you are not looking to go high hp and the 1/8npt will suffice.(correct) The parts are stacking higher and higher for my first 7.3 project. So being I have not got into it yet I enjoy all these different ideas. Sorry op for the semi hijack.
Hotrodtractor
Moderator
Yeah - you'll be fine using the 1/8NPT fittings - 99.9% of people will be fine using them. If you ever did want to change it, you can do that at a later date.
Strictly Diesel
Active member
Using the rear ports isn't even "necessary" for BIG power. I'm feeding 400/400s through the 1/8" ports with no pressure drop, as were the WOP Lightning and Rail when those had 7.3L engines in them.
m j
Active member
DI still sells the fitting. I bought them a little while ago. not on his site though you have to call.
I just cannot see using an a1000 size pump with a 5/8 outlet necked down to two 1/8 npt inlets. it has to be hard on the pump longevity.
it isnt like it is a difficult thing to feed through the back of the head with a -06 (I havent looked at returning through the front yet)
you are already changing the entire fuel supply system to -06, so two more -06 fittings seems to me a no brainer.
DI had them on the shelf. they are a very nicely done stainless item and inexpensive.
I just cannot see using an a1000 size pump with a 5/8 outlet necked down to two 1/8 npt inlets. it has to be hard on the pump longevity.
it isnt like it is a difficult thing to feed through the back of the head with a -06 (I havent looked at returning through the front yet)
you are already changing the entire fuel supply system to -06, so two more -06 fittings seems to me a no brainer.
DI had them on the shelf. they are a very nicely done stainless item and inexpensive.
FrankTheTank
Active member
The thing I like the most about feeding the rear of the heads is it cleans up the valley even more.
97f350stroker
New member
I used 1/8 npt to -6an adapter and a -6 45° swivel on the heads with a y in the valley. So I have 1/2 pushlock from my filters up to the y in the valley, then 3/8 braided out of the y to back of heads, and 3/8 braided from front of heads to regulator.
97f350stroker
New member
Chvyrkr
Active member
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I think bottom line is like Dennis said...
If you're using xxx/xxx injector at x.x PW and not gettin a pressure drop, you don't need to mess with your fuel system.
But, there's nothing wrong with a little overkill
If you're using xxx/xxx injector at x.x PW and not gettin a pressure drop, you don't need to mess with your fuel system.
But, there's nothing wrong with a little overkill
earlybroncoboy
Member
97f350stroker
New member
No the lifting eye had to come off that was just before I mocked up the down pipe.
Thanks bronco boy.
97f350stroker
New member
Are you using a turbo kit from a vendor or fabbing your own? I used irates kit and the down pipe that came with it was perfect after massaging the firewall some.
