XiED
Tourer
Joined: Aug 2008
Posts: 494
Likes: 6
From: Southwestern PA
Is there a convenient place to ground the sensor for the front XIED? I have a '13 Heritage. My VIED's just arrived today so I haven't had a chance to take a good look, but at quick glance it looks like the frame is powdercoated. Not sure if there's a place near the voltage regulator to ground.
Advanced
Joined: May 2013
Posts: 88
Likes: 2
From: Calgary, Canada
Is there a convenient place to ground the sensor for the front XIED? I have a '13 Heritage. My VIED's just arrived today so I haven't had a chance to take a good look, but at quick glance it looks like the frame is powdercoated. Not sure if there's a place near the voltage regulator to ground.
Cruiser
Joined: Jun 2012
Posts: 237
Likes: 2
From: NC, USA
Not really. Engine sensors are generally either fed a signal from the computer, which they alter before returning it to the computer, or are fed a signal from somewhere else in the electrical system (such as a ~13 volt signal), which they alter before feeding it to the computer.
If the signals coming from the sensors didn't change, the computer wouldn't have the information it needs to take corrective action. It wouldn't even have any idea when to fire the plugs, because it wouldn't know how fast the engine is turning, or when the piston is nearing the top of the compression stroke.
(There are rare exceptions, such as functions which are based on things like how much time has elapsed since startup).
If the signals coming from the sensors didn't change, the computer wouldn't have the information it needs to take corrective action. It wouldn't even have any idea when to fire the plugs, because it wouldn't know how fast the engine is turning, or when the piston is nearing the top of the compression stroke.
(There are rare exceptions, such as functions which are based on things like how much time has elapsed since startup).
That said... these devices, however primitive, may satisfy many or most of their users. That is fine and I'm not about to debate their merit.
I will tell you that I have tried them, and was initially satisfied.... until I bought a real tuner. The difference between the two is night and day. If you want a band aid, by all means go for it. If you want a tool that allows you to play with the brain of your engine management system.... save up and buy a real tuner.
It's really that simple.
Outstanding HDF Member
Joined: Aug 2012
Posts: 3,217
Likes: 90
From: Detroit
You've made quite a few assumptions about these devices. All your assumptions are incorrect. These things (call 'em what you want, ied's, xied', vied''s... etc) are connected between the computer output and the injectors. They are a fixed bias to the injectors which permanently alter the output signal of the engine management system. Your explanation of sensor input to the engine management system, while lengthy and seemingly impressive to someone inexperienced in basic control theory... is patently inaccurate.
I made no assumptions about xied's (etc), and will stand quite comfortably by what I've said about computer engine management.
I'll try to say this very politely: You might want to check again on whether they install between the computer output and the injectors, as you claimed.
Perhaps you had them confused with some other product, and should be more concerned about your own inaccuracy?
Last edited by Warp Factor; Jun 25, 2013 at 11:06 AM.
Tourer
Joined: Jan 2012
Posts: 335
Likes: 2
From: Dayton, TX
My understanding is that they are installed inline between the O2 sensor and the computer, thus changing the voltage value being sent to the ECU and tricking it into thinking it is richer/leaner than it actually is.
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Outstanding HDF Member
Joined: Aug 2012
Posts: 3,217
Likes: 90
From: Detroit
Correct.
Road Captain
Joined: Aug 2009
Posts: 526
Likes: 4
From: North Atlanta Georgia
"I will tell you that I have tried them, and was initially satisfied.... until I bought a real tuner. The difference between the two is night and day. If you want a band aid, by all means go for it. If you want a tool that allows you to play with the brain of your engine management system.... save up and buy a real tuner. "
Having used Xied's and a PV tuner, that is what I found as well. American Iron Magazine reviewed and said any changes occasioned by the use of the Xieds are slight.
If it works for you go for it, but I hate to see someone who really needs a tuner try to save money with Xied's when it's really going to cost them money in the mid term.
Having used Xied's and a PV tuner, that is what I found as well. American Iron Magazine reviewed and said any changes occasioned by the use of the Xieds are slight.
If it works for you go for it, but I hate to see someone who really needs a tuner try to save money with Xied's when it's really going to cost them money in the mid term.