Injector pipe no 6

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Or "liquid metal" (a type of epoxy resin) reinforced with a jubilee clip added as the liquid metal starts to "go off". Clean and roughen the area of the pipe.
 
I though braZe it but one pipe must be rotton and two
It's right next to the union pump side I found a set on eBay £ 15 sod it I'll go for that
 
defender300td1 said:
I though braZe it but one pipe must be rotton and two
It's right next to the union pump side I found a set on eBay £ 15 sod it I'll go for that
Click to expand...

Best bet then. But it's unusual for injector pipes to rot they are pretty heavy gauge tube. Know them crack from vibration or rubbing together if not properly clipped and supported. But never seen one rusted through.
 
Haven't got it off as yet still using it untill pipes arrive definitely not union joint, as spraying sideways toward the block from side of said pipe , guess I stick second hand one on and like you say braze the one I take off keep is a spare, yea you wouldn't think they would rot with oily diesel going through them would you, I will know more onced removed .

I new there was something wrong I could smell it checked in the dark last night but could not see any thing was hoping it was a spill pipe as if I would be so lucky , there is a slight change at tickover now guess its not quiet being fed enough now wouldn't you?
 
Ok these been dispatched today
2A0F708F-3DEF-4499-BFA4-D05E62F48BA4-15030-000014FC8B2B6924.jpg
just wondering could I of made em out of my brake pipe and flaring tool or are they steel for a reason forget that just found out to high pressure wil fracture the copper .
 
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defender300td1 said:
Ok these been dispatched today
2A0F708F-3DEF-4499-BFA4-D05E62F48BA4-15030-000014FC8B2B6924.jpg
just wondering could I of made em out of my brake pipe and flaring tool or are they steel for a reason forget that just found out to high pressure wil fracture the copper .
Click to expand...

High pressure pulses will effect the comparatively thin walled copper, causing it to go hard and brittle. That is why steel injector pipes are heavy gauge.
 
Another reason to not make your own is each pipe has to be the exact same length. Otherwise you'll never be able to correctly time up the injection and pressure would be different, so it'd run like a bag of nails.
 
Bix said:
Another reason to not make your own is each pipe has to be the exact same length. Otherwise you'll never be able to correctly time up the injection and pressure would be different, so it'd run like a bag of nails.
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No not so. It does not matter if the pipe is two miles long. Fluid (diesel) is incompressible, so if 2000 psi is applied at one end 2000 psi will come out the other.
 
wammers said:
No not so. It does not matter if the pipe is two miles long. Fluid (diesel) is incompressible, so if 2000 psi is applied at one end 2000 psi will come out the other.
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Agreed when pipe is full no air makes no difference
I think your getting mixed up with electricity cables

Eek
 
True, but as I understand it, the pipes expand, different lengths of pipe mean different amounts of expansion. We're not talking by huge amounts, but enough to make a difference.

Though I believe the main issue was distance travelled, if you make your own pipe and it is too short, the fuel arrives early. Too long and it gets sent out of the exhaust.
 
When pipe is full then all amounts are up to injector, pump rotation is what pumps, any alterations would be in pump or worn injector ps you can't make to short they would not reach would they as iv learnt you can take a bit of but you can't add it on ;)
 
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Ah yes, thinking I should've stayed in school for longer.

The length I was referring to is a lot of the pipes seem pointlessly bent into silly shapes, that was to make sure every pipe, closest to and furthest from the pump are the same length. So as the pump makes its cycle each squirt of derv has an equal distance to travel so it all arrives in the combustion chamber at the correct time.
 
Bix said:
True, but as I understand it, the pipes expand, different lengths of pipe mean different amounts of expansion. We're not talking by huge amounts, but enough to make a difference.

Though I believe the main issue was distance travelled, if you make your own pipe and it is too short, the fuel arrives early. Too long and it gets sent out of the exhaust.
Click to expand...

If you read the earlier posts about using copper brake pipe, you would see i said injector pipes are thick walled. They designed not expand and contract causing work hardening or they would crack at will. Injector pipes are made like that so they can be clipped together to stop vibration which again would crack the longer ones in very short order. The length of an injector pipe has nothing to do with timing.
 
wammers said:
Are you taking the ****? :p:p:p:D:D
Click to expand...

No, look at the calcs for fluid moving through pipes, just like electrics there are losses involved due to the interaction of the fluid with the pipe walls absorbing energy. The longer the pipe, the greater the losses.
Fuel injection is not just applying pressure, the fuel has also to move through the pipe to the injector.
 
On a gigantic oil rig fuel pipe maybe.

The pipe lengths are different in all different ways including the bends 1st is nearer than 6th and so on.i am not even going to measure them as I already know they are different yet they can still keep up with each other. The reason is its the pump pressure combined with the injector that regulates the amount of spray needed :)
 
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