Holley Dominator wideband o2 harness pigtail swap question
10-19-2015, 07:09 AM
#1
Holley Dominator wideband o2 harness pigtail swap question I'm wanting to run dual widebands with the Holley Dominator ECU. Holley calls for their wideband sensor, the "Holley Bosch LSU4 wideband sensor" and it sells for $95.
Innovative Motorsports sells a Bosch LSU4.2 wideband sensor that sells for $58.
As far as I can tell they are exactly the same besides the pigtail. I have two of the male pigtails from Innovative and two new Innovative Bosch sensors. Would it be possible to swap the pigtail on the Holley harness to be able to use the Innovative wideband sensor if they are in fact the same?
Innovative Motorsports sells a Bosch LSU4.2 wideband sensor that sells for $58.
As far as I can tell they are exactly the same besides the pigtail. I have two of the male pigtails from Innovative and two new Innovative Bosch sensors. Would it be possible to swap the pigtail on the Holley harness to be able to use the Innovative wideband sensor if they are in fact the same?
Last edited by Jc803; 10-19-2015 at 07:57 AM.
10-19-2015, 07:48 AM
#2
Came across this. Not sure if its saying to replace the 4.2 with the 4.0 or the other way around. If anything I'll just wait to get the harness and try the 4.2 that I already have.
http://forums.holley.com/showthread....ension-Harness
http://forums.holley.com/showthread....ension-Harness
10-19-2015, 03:58 PM
#3
I made a post on the Holley forums and they replied with this,
"It's a proprietary wideband O2 sensor (Link), specifically made & calibrated for Holley EFI."
The link takes me to the Holley Bosch LSU4 wideband. Hopefully someone knows if you can change the pigtails and make the Bosch LSU4.2 wideband work. Its half the price, and a better sensor. Whats not to love about that. Or hell getting a LSU4.9 sensor to work would be even better.
"It's a proprietary wideband O2 sensor (Link), specifically made & calibrated for Holley EFI."
The link takes me to the Holley Bosch LSU4 wideband. Hopefully someone knows if you can change the pigtails and make the Bosch LSU4.2 wideband work. Its half the price, and a better sensor. Whats not to love about that. Or hell getting a LSU4.9 sensor to work would be even better.
10-20-2015, 09:03 AM
#4
Moderator
Sorry you aren't getting answers here, but $95 seems like a reasonable price for a wideband sensor. I recall a thread on another product where the company wanted $250+ for their "specifically made & calibrated" O2 sensor and there was justifiable a lot of resistance to that.
Speaking of "resistance", wideband sensors have a calibration resistor in them and it is therefore plausible that it has a custom resistor value for Holley.
Speaking of "resistance", wideband sensors have a calibration resistor in them and it is therefore plausible that it has a custom resistor value for Holley.
10-20-2015, 02:01 PM
#5
Mrvedit, For me it wasnt really about the price, it was about being able to use the LSU4.2 instead of a LSU4. Plus the fact that I have 2 brand new Innovative LSU4.2 sensors that I keep for back ups but thats besides the point.
But you are correct. From what I've found so far, and what a Holley admin has told me, the Holley/Bosch LSU4 advertised on their website has actually been changed to a LSU4.2, but kept the same pigtail. But even though it is now a LSU4.2 it still shows its a LSU4 in their products page. Also they are calibrated to the Holley ECUs.
Long story short I'm fine with that and have already purchased 2 of the Holley sensors. I just couldnt come to accept paying $100 for LSU4 sensors when you can get LSU4.2 sensors for $50. But it all makes sense now.
But you are correct. From what I've found so far, and what a Holley admin has told me, the Holley/Bosch LSU4 advertised on their website has actually been changed to a LSU4.2, but kept the same pigtail. But even though it is now a LSU4.2 it still shows its a LSU4 in their products page. Also they are calibrated to the Holley ECUs.
Long story short I'm fine with that and have already purchased 2 of the Holley sensors. I just couldnt come to accept paying $100 for LSU4 sensors when you can get LSU4.2 sensors for $50. But it all makes sense now.
10-21-2015, 09:07 AM
#7
Mrvedit, here is everything you'll need. Just a heads up. I had no idea so much was needed/not included. $2000 turned into $3,800 real quick.
I can understand the ECU and harness being separate since the ECU is universal. But I think the power wire should be included in the harness, no matter which harness you pick. Same can be said with the injector harness. The LS harness should include injector harness for stock style injectors and make different injector harnesses add ons. Also the LS harness can only use one wideband, if you want to run dual widebands theres an additional harness for that also.
Of course the digital dash is optional but worth it in my opinion. Saves money and dash space for gauges, less wiring, and the ability to tune or change tunes on the fly without taking my laptop with me everywhere like I do with HP Tuners.
I can understand the ECU and harness being separate since the ECU is universal. But I think the power wire should be included in the harness, no matter which harness you pick. Same can be said with the injector harness. The LS harness should include injector harness for stock style injectors and make different injector harnesses add ons. Also the LS harness can only use one wideband, if you want to run dual widebands theres an additional harness for that also.
Of course the digital dash is optional but worth it in my opinion. Saves money and dash space for gauges, less wiring, and the ability to tune or change tunes on the fly without taking my laptop with me everywhere like I do with HP Tuners.
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10-21-2015, 10:12 AM
#8
Moderator
Thank you for documenting everything needed for a complete Holley setup. I suspect this will help many future readers of this thread.
Obviously the $800 "Digital Dash" is optional, but sure is cool.
Obviously the $800 "Digital Dash" is optional, but sure is cool.
10-31-2015, 12:03 PM
#9
I'm wanting to run dual widebands with the Holley Dominator ECU. Holley calls for their wideband sensor, the "Holley Bosch LSU4 wideband sensor" and it sells for $95.
Innovative Motorsports sells a Bosch LSU4.2 wideband sensor that sells for $58.
As far as I can tell they are exactly the same besides the pigtail. I have two of the male pigtails from Innovative and two new Innovative Bosch sensors. Would it be possible to swap the pigtail on the Holley harness to be able to use the Innovative wideband sensor if they are in fact the same?
Innovative Motorsports sells a Bosch LSU4.2 wideband sensor that sells for $58.
As far as I can tell they are exactly the same besides the pigtail. I have two of the male pigtails from Innovative and two new Innovative Bosch sensors. Would it be possible to swap the pigtail on the Holley harness to be able to use the Innovative wideband sensor if they are in fact the same?
the answer is that Holley uses a Sensor specifically calibrated for the ECU
it has a specific resistance and inductance to work to a specific tolerance and accuracy with the Holley ECU's
so you cannot use just any sensor and swap a pigtail....
if you try to do that...it will not work properly
11-06-2015, 06:06 PM
#10
I'm considering going with the dominator ecu, so if I'm understanding correctly it only requires 1 wideband, with the ability to run 2? So if you choose to only run 1, you run just a normal o2 sensor on the opposite side?