.093 or .120 December 18, 2009 10:08AM
When should a person go to .120 size lines versus the .093. Any benefits or disadvantages to either. Running a p-pump at 650-700cc of fuel.
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Re: .093 or .120 December 21, 2009 07:46AM
anybody have any input on a open rpm setup on what line size
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Re: .093 or .120 December 21, 2009 08:13AM
I was told that if running less than 800cc's its better to use .093, thats just what i heard.
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Re: .093 or .120 December 21, 2009 01:01PM
I've had two reputable pump builders tell me two different things. One said the .120 and the other .093. without giving thier names. This is on a superfarm set up around 650cc with dual feed injectors. Is it based on rpm, fuel, etc. Any reason for sure one over the other before settling on a size. Seen used sets for sale but don't want to buy something unless for sure.
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Re: .093 or .120 December 22, 2009 04:38AM
Was told the .120's would act as accumulator and delay the timing with that little fuel, which kindof makes sense.
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Re: .093 or .120 December 22, 2009 07:42AM
The line is always full, no delay or filling of line.
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Re: .093 or .120 December 22, 2009 11:32AM
Just so were clear............ A well putting out 5 gallons per minute running thru a garden hose free flow goes pretty quick and has good pressure ................... now you run that same 5 galoons per minute thru a 6 inch irrigation pipe, is the water on??? can you tell? hmmmmmmmmmm I just cant tell yet....... ummmm well it must be slow.

The point is you DONT need a .120 line because it WILL slow the timing down unless you ARE using a BIG pump (sigma comes to mind) and are actually using that much fuel.
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Re: .093 or .120 December 22, 2009 12:25PM
Pump guys will always want you to run the bigger lines if your up around 600cc and 4000 rpm's plus, because its easier on the pump, less chance sticking plunger. I would say if around 700-800 need to go to the .120 lines with big dual feed injectors.
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Re: .093 or .120 December 22, 2009 12:28PM
Thank you for basically repeating what I was saying
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Re: .093 or .120 December 23, 2009 03:44AM
Don't think I repeated what you said, I said nothing about any well pump and garden hose. the guy asked a question why he got 2 differant answers on which lines to run I tried to answer that question why he might get two differant answers. a sigma is gona run even bigger lines than the .120 for your info. don't know what you consider a big pump, a 11mm a -pump is a big pump compared to a stock 9.5 mm rotary. if under 600 cc. fuel most recommend .093 lines 600-700ish won't notice any differance in performance just little less stress on pump, if around 800 ish would definatly go to the 120's, big dual feed injectors won't do you any good if you are going to restrict them w/small lines in frount of them.
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Re: .093 or .120 December 23, 2009 04:28AM
Thanks Gary for you input.
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Re: .093 or .120 December 23, 2009 11:57AM
What ever dude ............. We were on the same page. ..........Well I thought we were leading him with education in the same direction .......... you on the other hand I guess dont.

Not everyone runs a sigma. And at the level that the original asker is at.............. I bet he is a LOOOOOOONG way from a sigma.
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Re: .093 or .120 December 22, 2009 12:56PM
Now all this info makes a little bit more sense out of it all. Is the rpm related issue be down the track or off the line. any more input is really informative.

Thanks you all
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Re: .093 or .120 December 23, 2009 05:41AM
If you reduce the 6" irrigation pipe back down to a garden hose you're going to have the same or a little more velocity out the end. Put identical nozzles on them & if anything you'll have more pressure at the nozzle on the 6" line due to less pressure drop. All of this is irrelevant to injector lines by the way...

IF the lines are full of fuel only (no air - even tiny bubbles) it's not going to affect the timing because it's an incompressible fluid. The plunger puts fuel into the pump end & fuel has to come out the nozzle end immediately because there is no other place for it to go.

Now if there is air in the fuel the fluid becomes compressible & it will take an extra amount of time because some amount of fuel goes in the pump end to compress the fluid before the nozzle pops and fuel starts to flow.
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Re: .093 or .120 December 23, 2009 07:13AM
Not to start conflict.. but why are the lines all the same length...
not sure of the compression of diesel fuel.. most hydraulic oils is .5% per 1000 psi.. In theory it really shouldn't make much differance... Back to the pipe.. the pressure and flow at the end should be the same at the end.. but injection lines should be also.. but it doesn't always work..
I'm guessing you are loosing some do to compression of fuel, and line flex???? (Just thinking out loud here..)



Edited 1 time(s). Last edit at 12/23/2009 07:20AM by JDGnut.
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Re: .093 or .120 December 23, 2009 11:49AM
Ya, the well guy was on the right track,but missing a couple of things. Sorry. The Inj. pump is not a well pump. And we have a big 3000lb. plus restrictor on the end of the line. we also want this to happen in a short period of time, the quicker the better OK?
We could shoot out a 1/4 lb. hot dog or a 1/4 lb. slice of balooney, More to come! Are we thinking?
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Re: .093 or .120 December 23, 2009 12:04PM
Consider the environment that we ARE talking about. Tractor pulling......... performance parts......... Fuel flowing thru the pump and returning to the tank at a pretty good rate and then doing it again ............ well unless you are carrying 30 gallons of fuel........... Pusher pumps thru all this HEAT the fuel as well due to this plus mild airation........ some more than others. So in a perfect world timing slow........ maybe not........... in most of us working with standard laws of physics........ well ........ it will slow it down. This is according to what your AVERAGE guy/girl has on their AVERAGE tractor. I'm not talking about Esdon,Linders or anyone in the upper levels of super or pro.

Regular entry level hotfarm or there abouts is gonna have this issue.
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Re: .093 or .120 December 23, 2009 01:09PM
I've never messed with one but am wondering if this is how the air dog or similar systems help? Remove the entrained air & make the fuel shot quicker?
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Re: .093 or .120 December 24, 2009 01:23PM
James Wrote:
-------------------------------------------------------
> I've had two reputable pump builders tell me two
> different things. One said the .120 and the other
> .093. without giving thier names. This is on a
> superfarm set up around 650cc with dual feed
> injectors. Is it based on rpm, fuel, etc. Any
> reason for sure one over the other before settling
> on a size. Seen used sets for sale but don't want
> to buy something unless for sure.


.093 its more pressure
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