It does not really matter where Mitsubishi says they grounded. As long as you are improving the flow of electricity it won't hurt. That does not mean using 0 gauge wire, as that will increase weight and be costly. Granted, they are different cars, but oHMS law remains constant. Note be sure to clean grounding points with some sort of abrasive material (sand paper, wire brush, etc) to ensure good contact. I have linked a graphic from the rx7 forum that will give some insight.

Hope this helps.

 

I've seen these advertised in the Ralliart Japan site. They want around $240 fort the wires!! Wow, are the wires made of solid silver? Of course, I would guess that since Ralliart makes them, they must work, no?......

Well, I have a question, if they improve performance, can the increase be measured? Has anybody done Dyno tests of these wires?

I also wonder why they feel they need to market these things at high prices if they were needed to begin with..

Thanks for any information,

Manuel

 

Manuel,

There have been dyno runs proving increased numbers on other cars. The gains are not huge, but are usually a couple of hp/tq. I believe the highest gain I remember seeing is 9lb/ft tq.

I have also seen tests done with OBDII info showing less fluctuations in idle, i.e. smoother idle.

The 350Z kits that are being custom made are 4ga wire. I don't think anyone did any testing to see if using 4ga over 8ga was beneficial. That is just what the Nissan Japan kit used.

What does the kit use? Like ADMstunna, I would like to see where is making all their connections.

 

Thanks, I would like to see those test results. Even though it's fairly expensive it would be a really good mod if you could get more power so simply! Surely, there can be any issues come up from just improving the grounding of the elctrical system..??
By the way, here is a link to MitsubishiParts.com, the sell the earthing kit for a more reasonable price than the Ralliart Japan site advertises. http://www.mitsubishiparts.net/catalog/?section=90

 

I will see if I can find them again. This was a very hot topic amongst the 350Z owners when our cars first came out.

Derek

 

Just buy battery cable from your local auto parts store. It's got the terminals on it already. Your auto parts store might even have the flat braided ground cable which would be even better.

Also make sure that your ground connections form a star pattern instead of a loop. Ground loops are bad. The center of the star should be tied to the negative battery terminal.

One problem that you might encounter with the enhanced grounding is more ignition noise on your radio.

I wouldn't expect any noticeable increase in power unless the stock grounding cables were exceptionally bad. The 4 or 5 HP increase that people are reporting is probably within the error of the dyno itself.

As an EE, I personally think it's ridiculous for someone to sell you wire for $80.

 

Here is the screenshot from the OBD-II scanner testing the idle without the grounding kit:

 

Here is the screenshot from the same car with the grounding kit installed:

 

The thing to note is the lower difference in the max and min values for the RPMs. Thus lower fluctuations in idle.

I couldn't find the dyno charts in my cursory search, but I will look some more.

mhj1r,

I can't tell you why it seems to work even though logic says it shouldn't. But obviously it is benefiting some. A 9lb-ft increase would be outside most dynos margin of error on a car with 230ish lb-ft of torque measured at the wheels.

Derek

 

Or the idle could be exactly the same, but the signal to the ECU could be cleaner. Less noise gives less peaks and valleys, so a higher min and a lower max and hence a lower difference.

$80 for a cleaner idle is pretty worthless IMHO. If there are dyno graphs showing torque gains through the RPM range, that's a different story. Even then, for a marginal or "in the noise" gain, I'd save my $80 and put it towards something else.

 

Wow. Excellent post, thanks for the evidence pics. So now all that's left is where to buy, or make them for myself? Would high quality oxygen-free audio type cabling work well for this application (say 8 gauge)? And what does it mean the connection has to be a star shape? Thanks for the help.

 

A "star" shape means one central point that all others are tied to. So if you have 3 points you want to hook up, wire each one directly to the negative battery terminal. Do not wire point A to point B to point C, then point C to the battery terminal.

 

Arcticfury,
Nice to see someone post measurements. Good work!.
Not sure how to interpret the RPM change, but assuming the stock grounding scheme is lousy, the question becomes, is the expensive kit worth it, or will the heavy gauge ground straps from Autozone ($3.99 each i think) do the same job?

Purecoda,
Not sure what oxygen-free audio cable is, so I can't really comment on it. Basically you want low resistance AND low inductance wire. Stranded/braided wire has lower inductance than solid wire. I'm pretty sure that the braided, flat ground straps are even lower, but I've never measured it.
Also, Iodine23 is correct about the star pattern.

 

I just installed a clone kit as seen on this forum. High quality materials, custom made using part as template complete with directions. Simple install just a little time consuming.

Check out this thread:

https://www.evolutionm.net/forums/sh...096#post252096

 

Oxygen-free audio cable is supposed to be an ultra-low resistance cable used for audio system installs. Its a bit more expensive but MUCH higher quality than hardware store wire. It is also often shielded, as to not allow as much noise interference into your audio system.

I figured this would be excellent wire to use for this application. So, has anyone done this install in a regular Lancer yet?