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Unread 02-28-2012, 07:15 PM   #61
AlphaLorde
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What does higher current mean for the system and how would that effect the computer?
I'm only asking, no need to try and talk down to others.

If the injector flows 22lbs/hr @ 39psi and if swapped with different ones that flow 22.5lbs/hr @ 42psi. At the stock 39psi wouldn't the new injector flow less then stated? I wanna learn, show me how to correctly understand this...

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Unread 02-28-2012, 07:21 PM   #62
MilanJeep
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Don't worry about the impedance too much. Just know that anything 12 and up is what you want. For the people the bought 703's from me, I tried to match everyone up in terms of impedance
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Unread 02-28-2012, 07:23 PM   #63
mickey360ZJ
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So what would u all recommend for my 5.9 ZJ if I want power? And if I want to try for MPG
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Unread 02-28-2012, 07:48 PM   #64
elkski
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I didn't mean to talk down to you.. and let it be know I just have been on this site reading voraciously for 2 weeks. I do have a good understanding of this sort of stuff. Pressures, flows, currents, control circuits. A 14 ohm compared to a 12 ohm just means what 15% more or less current.. THer is probably only very small power required to open an injector so I gather this difference is not a problem for the wiring or control circuit. Using the 703's sounds like it is so close to the factory flow rate in the 93-95 to original that the circuitry and control loopcan handle them. Just imagine a super clogged air filter runs ok and how much more gas is needed at sea level compared to 14k in Colorado. when 18,ooo ft altitude has half the O2 as sea level and these things can run tells you something.

impedance is just= 1/R think of it in terms of what size hose the current can flow through . larger ohms and smaller flow of electrons.at a given voltage.. voltage is like the pressure in a air line... higher means more flow. current is how much flow..

I really dont thnk the gas milage is going to be a big thing??? I hope It is .. my 93 5.2 jeep has been pretty much a 16 mpg for its whole life of mixed driving..
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Unread 03-02-2012, 01:03 PM   #65
Proph2010
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Thank You

I have been lookinig for information on this for a long time!
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Unread 03-02-2012, 02:10 PM   #66
MilanJeep
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Made it to the junk yard today, was able to get 1 more set of 703s for anyone who is having a hard time finding them
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Unread 03-02-2012, 05:59 PM   #67
extrememarine
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test them.

I had very similar experience when I first installed the 703's. I did not take the time to rig up a way to pressure test them. I had 3 that were dumping fuel; I found this by taking a clear piece of tubing and a children's cough syrup syringe and made a tester. I put some carb cleaner in the tubing, slide it on the injector, and pushed the plunger down to pressurize the fluid. Sure enough, droplets would form on the motor side of the injector. Swapped those three out and all was fine the second go round.

Quote:
Originally Posted by sebian View Post
I just tried the 703 injector swap in my 95 V8. All I got for my efforts was a massive cloud of white smoke.

I am guessing that I got a leaky injector or two, and they just dumped fuel into the combustion chamber. No external leaks or anything, and I did ohm them out prior to installing them. All were just a hair over 12 ohm. Put the old injectors back in, and within about 10 minutes the Jeep cleared back up.
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Unread 03-02-2012, 09:06 PM   #68
sebian
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That is simplistic genius! Great idea, I will have to rig up a simlar device and test the ones that I have. Maybe of the 10 I have, I can salvage 8 of them to reinstall in my Jeep.
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Unread 03-03-2012, 06:24 AM   #69
Proph2010
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Quote:
Originally Posted by z71tbi View Post
I haven't done this yet, but did you do clean and rebuild the injectors before installing? I saw in the write up to use this kit.
Quote:
Originally Posted by bananaslug View Post
I did

ive followed this link and it is for the ev3 type injectors, is that acceptable to use in the ev6 type injectors that the 703's? Also i was able to find these injectors all over the internet...typically going brand new for 24.99 a piece, this kit would not be required if brand new of ourse im just wondering about it because i dont know anything about injectors(tyes, casings, flow rates, etc)
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Unread 03-03-2012, 07:25 AM   #70
elkski
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Yes there are injector deals all over the net... I found one person who will sell you 8 ohmed and cleaned and tested for matching flow rates within 5% for 120$ OF course this was after I paid 20$ for my kit and 8 x 6=60$ at the JY for mine.
I think some of these guys got them for free at junkyards and have built up a testing rig where they can actually make sure the flowrates are matching within 5%. Some guys have ultrasonic tanks.. These parts have a very small orifice so you need to be real careful what gets under the screen.
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Unread 03-03-2012, 09:24 AM   #71
Jon20683
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I have ford 24s I get 13 mpg city and that's with a blown plenum gasket

Besides that I can defineitly say i see way better idle and throttle response but I also I've mods that all go to gether
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Unread 03-03-2012, 10:24 AM   #72
ahoyt653
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just got done doing the 703 swap, smoother idle, seems like a little more power, time will tell, so far I am happy with it.
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Unread 03-05-2012, 07:01 PM   #73
augiedoggy
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the stock "778" on all the 96-99 magnums and bosch "703" injectors are both 12ohm so whats the problem?
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Unread 03-10-2012, 05:00 PM   #74
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Unread 03-10-2012, 08:48 PM   #75
trailhound
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Hate to be a newbie here but... when you say "f series" you mean like f150 s right. I have been sitting on these fuel rails or a 5.8 forever and would love to attempt to swamp em. Just trying to be sure I can use them. Thanks.
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