IDIBRONCO
IDIBRONCO
I don't think I'd worry about the O-rings unless you absolutely want to offer them. They are easy enough to come up with.
6.9,7.3 and 7.3 turbo fuel return lines?????s
- Thread starter Dregs Garage
- Start date
nelstomlinson
Full Access Member
The fuel return is a very weak point on these engines. I would be willing to pay up to get a solid fix.
Permanently affixed metal caps with hose barbs sticking up at an angle like the Mercedes injectors would be really cool: make them part of the injector. Metal replacements for the chintzy plastic caps would be a good second choice.
nelstomlinson
Full Access Member
This style would be peachy.
This would also be peachy.
The vital point is that they must be a solid, no-leak solution.
Now you are asking to reinvent the leak errr wheel!
The system is fine till you disturb ANY portion of it when it is aged.
Making a new injector aint gunna happen, so lets revert back to the best sealing caps idea.
Let's look at a better sealing solution, a quad seal or double\second oring or???
The system is fine till you disturb ANY portion of it when it is aged.
Making a new injector aint gunna happen, so lets revert back to the best sealing caps idea.
Let's look at a better sealing solution, a quad seal or double\second oring or???
nelstomlinson
Full Access Member
Would it really take a new injector? Or could we just do some mods to the existing injector body? Maybe braze a metal cap on, rather than depending on o-rings?
Changing the o-ring configuration would require machining the injector body ...
Maybe stout metal caps and some high-dollar o-rings that would last the life of the injectors?
Maybe have the caps extend down a bit so the bottom is mechanically supported by metal-to-metal contact rather than by the o-rings, which would still provide the seal?
A solution which requires some machining of the outside of the injector body might be doable, might be worth the expense if it worked well enough.
My statement making a new injector was to say research and dev. Would kill it....
If one could simply turn down\mod an idi injector to accept a new type of return cap this could be good.
We had a member make some a few years back but I think they are n.l.a.
One thing we could use is repeatability in manufacturing, unlike CHINA!
If one could simply turn down\mod an idi injector to accept a new type of return cap this could be good.
We had a member make some a few years back but I think they are n.l.a.
One thing we could use is repeatability in manufacturing, unlike CHINA!
nelstomlinson
Full Access Member
Yes, if somebody who is rebuilding injectors were to come up with a new, significantly improved cap that would work with an injector that he had tweaked the outside of, he could sell the injector/cap combo.
Maybe turn a shoulder on the injector body at the top and bottom of the cap, and use those shoulders to locate and secure a custom metal cap that would still seal with o-rings? If I had a lathe, I might play with that, if I had some time.
Since the metal cap will be stronger than the plastic one, maybe we could use the stock o-ring size, but a slightly smaller than stock ID for the cap for a tighter squeeze and better seal.
Maybe a slightly harder o-ring inside the metal cap would let us have a little more sealing force, and the harder ring might not get brittle so soon?
Would square rings seal better or last longer? What o-ring material will work bestest for longest?
I've put square rings in my dually and "X" profile rings in my F250. They haven't been in there long enough to know, but the square ones did seal a little better for me than the regular round ones.
It's a neat idea but you run into the problem of interchangeability. I wouldn't buy them just because then you're "stuck" with that setup. If for whatever reason something happens on the road you'd have to replace everything. Not that it would be likely, but it's food for thought.
i like the R&D rails, install is a *****, but ive had 2 years leak free service with viton's
i was lucky enough to get a set of aluminum caps when they were available several years back.
i have acquired a few other "sets" for the making in 2 different ways.
i found someone that machined steel caps, with the ID's correct.
but didnt drill them for barbs.
one project for when i have nothing to do..lol
also, one of Justins runs of rails were machined incorrectly.
so they never sealed.
i found out about this, and found a set, bought it cheap.
ive cut them in 8 sections, but need to get them on the lathe to finish them out.
again, its not a priority
i was lucky enough to get a set of aluminum caps when they were available several years back.
i have acquired a few other "sets" for the making in 2 different ways.
i found someone that machined steel caps, with the ID's correct.
but didnt drill them for barbs.
one project for when i have nothing to do..lol
also, one of Justins runs of rails were machined incorrectly.
so they never sealed.
i found out about this, and found a set, bought it cheap.
ive cut them in 8 sections, but need to get them on the lathe to finish them out.
again, its not a priority
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Dregs Garage
Registered User
I didn’t really consider the angle of the barbs like the Mercedes have...
i don’t think guys want to spend more money on re-engineered injectors that would cost more than the truck itself!
Dregs Garage
Registered User
I have seen your sweet set ups!
I just finished putting R&D rails on my 94 turbo truck YES lt was the biggest pain in the ass... the passenger side Hit the turbo and filter bracket so I had to cut BOTH ends down and retap them for plugs.
Did you get the aluminum caps from John(adv)?
yep.
Sup' Bri?
nelstomlinson
Full Access Member
There are people who are running old junk because it's cheap, and there are at least a few who would pay for a new truck, if it didn't come with a *** tank and computers. The first group is very price sensitive, and the second group looks at a $60,000 new truck that's a Hecho en China piece of computerized ****, and compares parts for the IDI to that $60,000, and thinks ten or twenty grand to make an IDI like new is a steal of a deal.
If we were still using stock return hose between modified injectors, there would be no reason not to run a mix of stock-with-plastic-caps and modified.
The mod I'm envisioning right now would be to true up the cylinder below the cap, have a metal cap that would seal as normal but stick down farther than normal, so that it slips over and is supported by the trued up injector body, and have a little o-ring on top, between the top of the cap and the injector line nut. That o-ring on top would just be to keep a little downward pressure on the cap, to make it harder to knock it loose.
Somebody who is rebuilding injectors already could probably do that at a reasonable extra cost. We're already paying $400++ for a set of good injectors. I'm in the middle of spending over $10,000 to build an IDI daily driver, so doubling the cost of a set of injectors is not a big deal, if they worked better for it.
SSDT bro!
tryin to keep all this smoke out of my lungs!
R&P is done on the chero...
but in all the hurry up and ordering part fiasco, i accidently ordered a 1410 pinion yoke.
which now has me waiting on a 1410 1356 slip yoke,
once that gets in, next week, i can measure and order a driveshaft...
then its wheels up!!!
