:::RHMT::: Real Home Made Turbo

General Category => Engine Management => Topic started by: pitobread on September 16, 2013, 06:28:15 PM

Title: NGK AFX. Cutting down that mile long cord?
Post by: pitobread on September 16, 2013, 06:28:15 PM

Good day sirs.  Was told via NGK support and also in the manual in not so many words that cutting down the mile long cabling on my AFX is a not recommended for calibration reasons.   I have a Miata and having that bundled up cabling under the limited dash space is dumb.  I don't think it would be an issue but I figured you fellas would have some insight and input.

(https://realhomemadeturbo.com/forum/proxy.php?request=http%3A%2F%2Fi.imgur.com%2F9HLiii4h.jpg&hash=b463dba1e7084fbeef0ce228c04977bca17dbbf1)

Title: Re: NGK AFX. Cutting down that mile long cord?
Post by: crxvtec91 on September 19, 2013, 09:54:47 AM

I approve!

Title: Re: NGK AFX. Cutting down that mile long cord?
Post by: Joseph Davis on September 19, 2013, 10:37:23 AM

Hold me.

Title: Re: NGK AFX. Cutting down that mile long cord?
Post by: pitobread on September 19, 2013, 06:31:24 PM

lol. It seems like such a minute change in resistance especially considering the sensor is calibrated and the unit can run on 11-28v.. It must be able to compensate for such a small change.

(https://realhomemadeturbo.com/forum/proxy.php?request=http%3A%2F%2Fi.imgur.com%2FL4sUZh.jpg&hash=e7c779f3d4fa60d08542ae376bd0d7d4b69cca7d)

Should I worry?

Title: Re: NGK AFX. Cutting down that mile long cord?
Post by: clwtwizted on September 22, 2013, 11:22:29 PM

 I think the problem in the cable may be in the shielding. If you splice all the wires and leave it open wiring it may get a mixed signal so as long as once you get done splicing it to tape it back together shouldn't hurt it.

Title: Re: NGK AFX. Cutting down that mile long cord?
Post by: rawr on September 23, 2013, 04:47:56 PM

The sensor is probably calibrated for a certain wire capacitance.  Changing wire length alters capacitance which effects the absolute value of your sensor offset slash calibration. Its not a big deal if you use your wideband as a delta measurememt and not think of it as an actual absolute number. (It probably wont 3v3n change the absolute number very much)

Title: Re: NGK AFX. Cutting down that mile long cord?
Post by: HiProfile on November 02, 2013, 01:42:40 AM

I'd never run an o2 to get absolute value, just to make sure the map is even and use the plugs to give the final word.

I can tell you I've lengthened the cable on my LC-1 w/o ill effects. I took an old PLX cable & put the correct end on it so the unit wasn't dangling in the engine bay.