Lb7 fuel rail info

[MAXLLY]

I am working on this kinda stuff... I am prepared to waste a fuel rail and make new.

I looked at it like this... (i always oversimplify and use common sense)

If we filled up a 5 gallon bucket and poked a hole in the bottom, releasing the plug and opening the hole would cause a leak. This leak is against 5 gallons of pressurized fluid.

If i apply this same thinking to poking a hole in the bottom of a Dam... the system as a whole will realize less pressure drop and volumn depleation.

Leaving only the injector, FICM and fuel viscosity to concern. BANKS still running alcohol in the trucks? Wonder why?.... perhaps cause its thin, cold and burns?

I realize this is a gross comparison (5 gls versus a large body of water), but it works.

jus my 2 pennies

In review this post is OT... sorry.

 

[sweetdiesel]

I am working on this kinda stuff... I am prepared to waste a fuel rail and make new.

I looked at it like this... (i always oversimplify and use common sense)

If we filled up a 5 gallon bucket and poked a hole in the bottom, releasing the plug and opening the hole would cause a leak. This leak is against 5 gallons of pressurized fluid.

If i apply this same thinking to poking a hole in the bottom of a Dam... the system as a whole will realize less pressure drop and volumn depleation.

Leaving only the injector, FICM and fuel viscosity to concern. BANKS still running alcohol in the trucks? Wonder why?.... perhaps cause its thin, cold and burns?

I realize this is a gross comparison (5 gls versus a large body of water), but it works.

jus my 2 pennies

In review this post is OT... sorry.

what you talking about willis

Banks runs alchohol? better more complete burn

wouldnt a large body of water have more pressure because of hydrostatic pressure

 

[MAXLLY]

I thought i read a discussion on DP that BANKS was running a little alky, makes sense to me. On another site i read that BANKS was running a blended fuel... #2, alky, lubricity additive maybe??? I take half of what i read and throw it out.

I was off on a little tangent with the rail thingy. Bottom line it's my thinking I want to increase line/rail size in a effort to create more volumn and less pressure drop when that injector is opened. Perhaps even a bigger issue with bigger injectors?... I have a bigger leak?

What do i know? I'm a nobody

 

[sweetdiesel]

more volume makes sense!

Banks probably is adding different fuels? who knows

I know personally accetone never helped me

 

[Mike]

I sure like this thread, I'll do some tear down and take pictures for comparison. Next vacation that is. Bookmarked for sure. Thanks Simon.

 

[MaxFarmer]

Hey Simon, is there any way you can edit one of those pictures to show where the piece (rail fitting) that you are drilling out is at? Thanks. :hug:

 

[Lennart]

Simon, what is the thread size of the rail pressure sensor? M12x1.5 or M18x1.5?

 

[sweetdiesel]

Hey Simon, is there any way you can edit one of those pictures to show where the piece (rail fitting) that you are drilling out is at? Thanks. :hug:

If i knew how i would,But on each rail where the HP fuel line goes in
there is the rail fittings, you pull the rail fittings off and will probably need a magnet to get the orfice
pull them out and use a drill press to increase the size

Simon, what is the thread size of the rail pressure sensor? M12x1.5 or M18x1.5?

On the lb7 i think its m12,but i would have to check to make sure

 

[MaxFarmer]

If i knew how i would,But on each rail where the HP fuel line goes in
there is the rail fittings, you pull the rail fittings off and will probably need a magnet to get the orfice
pull them out and use a drill press to increase the size

Makes sense, Thanks. Are there crush washers or something like that that I would have to have handy to put it back together?

 

[sweetdiesel]

Makes sense, Thanks. Are there crush washers or something like that that I would have to have handy to put it back together?

Nope,At first i was going to just pull the orfice right out
but the rail inlet fitting is actually tightened against the orfice close to a 1/8" difference


If you want i can try and get the TQ specs on the fitting

 

[MaxFarmer]

TQ specs? The only torq I usually go by is good-n-tight!

 

[LB7Diesel]

X2:d

 

[sweetdiesel]

TQ specs? The only torq I usually go by is good-n-tight!

Normally i agree on that,but this one kinda concerns me as i wouldnt want to squish the orfice and really dont want it to leak

 

[mvnvltn]

Mine are "Good-N-Tight"

 

[sweetdiesel]

OK OK I have a nice shiney new TQ wrench and i just want to use it...Allright:rofl:

 

[MaxFarmer]

The truth comes out!

 

[The Neens]

Obviously not sure what the Banks truck is doing, but I know when I mixed race gas with methanol our heap didn't run very well...

 

[McRat]

The LLY comes with a .75mm restrictor in the driver's side rail where it feeds the passenger rail.

The LLY has 7 holes that are .15mm each in the injectors.

So the restrictor has a .44 mm2 hole area.

The injector has a .12 mm2 hole area.

We never fire two injectors at the same time. So even if a bunch of small holes flowed as much a bigger one (based on area) it still is over 3 times the necessary flow.

I dyno'd before drilling the rail, then after. No change. Not sure what it is for.

LB7's are 7 x .16mm injectors IIRC.

 

[McRat]

PS - The Haters claim Banks runs alcohol. But at the last event, they asked the NADM (race organization) to bring the fuel. The NADM did not, but I believe the Banks guys when they say they run diesel fuel only. Well, and a LITTLE nitrous...

 

[sweetdiesel]

The LLY comes with a .75mm restrictor in the driver's side rail where it feeds the passenger rail.

The LLY has 7 holes that are .15mm each in the injectors.

So the restrictor has a .44 mm2 hole area.

The injector has a .12 mm2 hole area.

We never fire two injectors at the same time. So even if a bunch of small holes flowed as much a bigger one (based on area) it still is over 3 times the necessary flow.

I dyno'd before drilling the rail, then after. No change. Not sure what it is for.

LB7's are 7 x .16mm injectors IIRC.

Thanks Pat