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Hemi
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Discussion Starter #1
So I just got my .093 tubes put in. Simple install!
I know I'm getting more fuel because I saw 100* more on the EGT gauge than I had before. Here are some pictures of the differences.
Before: you can see the filter in there.


After: straight through!


I'm running 7x.012 with .010 lift and stroke.
They most likely won't make a difference if you are running smaller sizeed injectors.
 

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I ran a set of those tubes for a lil while. Only thing i notice was a very slight lope at idle, and installing out when i put it in drive on the auto. on the dyno, the numbers stayed the same. no more power no less. So good luck hotter egts and no more power..sorry ill pass
 
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Hemi
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Discussion Starter #5
Missed that. If so those are quite a bit smaller than what I'm running. I don't see any need/reason to go bigger with that small of injectors.
 

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I would've keep them in if i had a manual trans, but with a tight converter and low stall. didnt work out to good. I would like to see some numbers from a setup that gained HP from the bigger tubes.
 

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Hemi
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Discussion Starter #7
I should be on the dyno february 12th but I haven't been on with these mods before so no comparison.
 

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I would've keep them in if i had a manual trans, but with a tight converter and low stall. didnt work out to good. I would like to see some numbers from a setup that gained HP from the bigger tubes.
So would I benefit from these tubes since I have some big ol injectors!!:confused013:
 

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think id see a difference with 200 horse injs? lol
 

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Heres my thought. Your Injector itself is going to put out X amount of fuel when popped, The fuel that is pushed throu the injector and out the very Small holes on the end of the nozzle are going to flow what they were designed to flow. If the tube that is feeding the injector has a flow rate of X at some sort of base pressure, Then if you remove the Filter and bored the tube out, seems to me the flow rate is going to change and the base pressure inside the tube are going to be lower, If the pressure is lower then isnt the Injector going to have less "pop" when it is fired. Less pressure+less atmomised fuel = more smoke for less or equal power, Which would explain the "I think i got more fuel because my EGTS went up a 100*" or did you gain that EGT temp b/c the fuel you are injecting is not being fully atmomised and unburnt? Until some real number come from it. Id stay away from them for any DD truck.
 

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Hemi
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Discussion Starter #11
The injector has to have a certain amount of pressure to pop so tubes can't lower the pop pressure. The injector is going to pop at the same pressure if it has a .06 tube feeding it or a .09 tube.
 

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The injector has to have a certain amount of pressure to pop so tubes can't lower the pop pressure. The injector is going to pop at the same pressure if it has a .06 tube feeding it or a .09 tube.
flow rate from the injection pump to the injector itself is controlled by lines and the tubes. Why you think if you run .120 lines after the injection pump and get a really bad lope, b/c the pop pressure is lower.. same with the tubes, lower pop pressure is going to have bigger droplets of fuel/ worse atomization. Poor atomization means the fuel and air don't mix well enough to combust all of the fuel in the combustion chamber, but rather fuel is burning in the exhaust manifold etc. Fuel mileage and power will suffer. Lower pop pressure effectively raises the timing a smidge, but this is negated by the poor atomization, Hey its your truck goodluck.:thumbsup:
 

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Hemi
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Discussion Starter #13
My injectors are set at 310 BAR. that's when they pop. Tubes aren't going to change how the injectors are set.
The lope comes from taking longer to fill the lines and tubes back up.
 

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I am pretty sure that the injector is not going to pop at a lower pressure. What would happen is you would loose some timing because the pump technically has to send more fuel to fill the bigger tube to create the amount of bar to pop the injector...hope that makes sense
 

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Hemi
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Discussion Starter #15
Yes it does and that's what I'm trying to explain.
 

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I am pretty sure that the injector is not going to pop at a lower pressure. What would happen is you would loose some timing because the pump technically has to send more fuel to fill the bigger tube to create the amount of bar to pop the injector...hope that makes sense

Agreed. It might lower timing a little but its not going change the POP pressure.


sent from my android using tapatalk
 

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Hemi
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Discussion Starter #17
My truck is not any smokier or hotter running during normal driving. The only difference is at WOT.
 

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did you ever hit that dyno and see if the tubes made a difference??
 

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Hemi
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Discussion Starter #19
Ihad no before numbers. I may be swapping injectors before long. If I do and get some more dyno time I'll try to get some back to back run with the stockers.
 

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when i drilled mine out i noticed easier, faster and smoother rpm through out the whole range. i like it.
 
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