Injector questions.
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Injector questions.
Just a few curiosity questions. Do the OBS 97 trucks have split shot injectors (AB). If so, do they have a different driver module, do the 99-03's have different driver modules to run the split shots? Also, what year is the best year to look for to do the driver module mod (i forget the acronym)? I have heard the 94 and 95s are the best, but I don't know. I would like to get my hands on a spare and mod it, and then test the two and see if there is much of a difference.
Post Fiend
Joined: Mar 2007
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From: Johnson City, TN.
The 1997 Cali models did have split shot injectors. All others had singles shots.
If you are talking about the IDM (injector drive module) the '94 - '97 had the same at 90 volts.
The '99 - '03 had 120 volts.
If you do the "IDM mod" then that changes it to 140 volts.
So it doesn't matter which one you choose to mod ('94 - '03) you will end up with the same result. 140 volts.
If you are talking about the IDM (injector drive module) the '94 - '97 had the same at 90 volts.
The '99 - '03 had 120 volts.
If you do the "IDM mod" then that changes it to 140 volts.
So it doesn't matter which one you choose to mod ('94 - '03) you will end up with the same result. 140 volts.
FOREIGN GURU
Joined: Jul 2006
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From: Celaya, Gto. MX
The 1997 Cali models did have split shot injectors. All others had singles shots.
If you are talking about the IDM (injector drive module) the '94 - '97 had the same at 90 volts.
The '99 - '03 had 120 volts.
If you do the "IDM mod" then that changes it to 140 volts.
So it doesn't matter which one you choose to mod ('94 - '03) you will end up with the same result. 140 volts.
If you are talking about the IDM (injector drive module) the '94 - '97 had the same at 90 volts.
The '99 - '03 had 120 volts.
If you do the "IDM mod" then that changes it to 140 volts.
So it doesn't matter which one you choose to mod ('94 - '03) you will end up with the same result. 140 volts.
IDM-100 uses a 75.0k Ohm (75,000 ohm) 1/2 watt 1% tolerance Metal Film resistor
IDM-110 uses a 75.0k Ohm (75,000) 1/2 watt 1% tolerance Metal Film resistor
IDM-120 uses a 73.2k Ohm (73,200) 1/2 watt 1% tolerance Metal Film resistor
so IIRC there are not IDM 90 volts.
Hotshot
Joined: Jun 2007
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From: Austin, TX
This is from forgotton:
IDM-100 uses a 75.0k Ohm (75,000 ohm) 1/2 watt 1% tolerance Metal Film resistor
IDM-110 uses a 75.0k Ohm (75,000) 1/2 watt 1% tolerance Metal Film resistor
IDM-120 uses a 73.2k Ohm (73,200) 1/2 watt 1% tolerance Metal Film resistor
so IIRC there are not IDM 90 volts.
IDM-100 uses a 75.0k Ohm (75,000 ohm) 1/2 watt 1% tolerance Metal Film resistor
IDM-110 uses a 75.0k Ohm (75,000) 1/2 watt 1% tolerance Metal Film resistor
IDM-120 uses a 73.2k Ohm (73,200) 1/2 watt 1% tolerance Metal Film resistor
so IIRC there are not IDM 90 volts.
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From: North East Ohio
The IDM number is the volts.
The early PSD's started with 100 volt, then they went to 110 volt sometime in '95 I think.
The SD in '99 went to the 120v.
There was no 90 volt IDM.
Any IDM will run any 7.3 PSD, but the higher the voltage the better.
The early PSD's started with 100 volt, then they went to 110 volt sometime in '95 I think.
The SD in '99 went to the 120v.
There was no 90 volt IDM.
Any IDM will run any 7.3 PSD, but the higher the voltage the better.
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ah, shows you what I know. So a 99-03 driver will run a non split shot and a obs will run a split shot?
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FOREIGN GURU
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Sorry TRAVIS.
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Hotshot
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From: Austin, TX
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From: North East Ohio
The electronics guys that build my flow bench controller (which uses an IDM) said they beilieve it's possible to bump to 160v (which is very easy to do) but they are not sure how long the rest of the components would last. It might be seconds, hours or thousands of hours of run time. Nobody has tried, too much $$$ to mess up. 140v is very reasonable as far as the rest of the stuff goes, but 160v is just pushing it.
Also, there comes a point when the solenoid/Poppet might just not react any quicker. 140v might be all it takes to make them as fast as they will be. Not sure...
Also, there comes a point when the solenoid/Poppet might just not react any quicker. 140v might be all it takes to make them as fast as they will be. Not sure...
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'96 7.3 F-350 Reg Cab 4x4 - bought new.
'04 6.0 E-350 custom 4x4
'08 6.4 F-550 Reg Cab 6 spd 4x4
'17 6.7 F-250 KR ccsb 4x4
'96 7.3 F-350 Reg Cab 4x4 - bought new.
'04 6.0 E-350 custom 4x4
'08 6.4 F-550 Reg Cab 6 spd 4x4
'17 6.7 F-250 KR ccsb 4x4
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From: Munroe falls, Ohio
The IDM has nothing to do with being split shot or not. Its the injector itself that determines split shot or single shot.
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Ah, ok, I thought maybe the IDM was actually telling the split shot injectors when to fire the two different times.