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xtrailing Profile
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Date Registered: 02-2005
Location: Geelong, Victoria
TOTAL POSTS: 190
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Re: Poor vehicle earth/ground


Brett, looks good BUT it appears you haven't scraped/sanded the points where they attatch on the body back to bare metal. In particular where you have attatched onto the drivers side tower you are still relying on the thread to make contact through the painted nut it screws into.You will notice a little black plastic knob/button a couple of inches from where you have connected onto. If you lever this out with a screwdriver you will notice it has a nut welded underneath it. You would be much better scraping the paint away, then attatching the earth straps with a bolt & star washers, then use some form of paint/rust inhibitor over the top(I use "zinc it" & it's a pretty close match). There are also more original earth points in behind the air box that need the paint scratching or a strap to them to achieve the optimum result.

 Cheers Phil
24/Feb/2006, 11:09 am Link to this post Send Email PM   Send Private Message
 
BRETT72 Profile
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Date Registered: 10-2005
Location: Orange. NSW.
TOTAL POSTS: 1999
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Re: Poor vehicle earth/ground


quote:

looks good BUT it appears you haven't scraped/sanded the points where they attatch on the body back to bare metal.

Thanks for the heads-up Phil.emoticon

I will endeavour to sand back the grounding points this weekend. I did find that passenger side point and hooked it up also.
As for the LH strut tower, good point, but my strut bar now covers that spot.

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BRETT72 - X235

24/Feb/2006, 11:48 am Link to this post Send Email PM   Send Private Message MSN
 
xtrailing Profile
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Date Registered: 02-2005
Location: Geelong, Victoria
TOTAL POSTS: 190
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Re: Poor vehicle earth/ground


Brett, if you have a look at some of my photo's in an earlier post you will see the area I mean for the bolt. I have the strut bar fitted & it clears this area! Maybe they have changed the strut bar design since mine?

Cheers Phil.
24/Feb/2006, 2:39 pm Link to this post Send Email PM   Send Private Message
 
jalalski Profile
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Date Registered: 02-2004
Location: SUTHERLAND, SYDNEY
TOTAL POSTS: 29094
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Re: Poor vehicle earth/ground


quote:

xtrailing wrote:
 Maybe they have changed the strut bar design since mine?

Cheers Phil.



No design changes have been made, it's still as good as it used to be emoticon



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24/Feb/2006, 7:58 pm Link to this post Send Private Message MSN Blog
 
BRETT72 Profile
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Date Registered: 10-2005
Location: Orange. NSW.
TOTAL POSTS: 1999
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Re: Poor vehicle earth/ground


Found it, thanks.


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BRETT72 - X235

24/Feb/2006, 8:35 pm Link to this post Send Email PM   Send Private Message MSN
 
AKAK9 Profile
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Date Registered: 01-2006
TOTAL POSTS: 133
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Re: Poor vehicle earth/ground


I know I'm coming in late, but I must say I have been reading this thread with a smile on my face.

Electrical current is impaired by resistance between two points. Resistance is increased by foreign material getting in between contact points. You-bewt flashy cables don't improve HP, they just return the car to the resistance that is simlar to when the car rolled out of the factory. You can get just as good results by putting a bit of vaseline between earthing points. (Costs a heap less too)

I've built rally cars for a living and never in my time have fancy electrical cables given "wonder" results. Basically it's a crock.
25/Feb/2006, 11:05 pm Link to this post Send Email PM   Send Private Message
 
xtrailing Profile
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Date Registered: 02-2005
Location: Geelong, Victoria
TOTAL POSTS: 190
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Re: Poor vehicle earth/ground


Akak9, if you had a good look at the earthing points on the xtrail you would realize that the only benefit of smearing them with vas would be to attract dust. Unless vas has a new ingredient that dissolves paint(watch out when used elsewhere!!!) there would be no benefit. As I have mentioned before the difference in the vehicle after this very simple mod was quite noticable in my case!
26/Feb/2006, 6:39 am Link to this post Send Email PM   Send Private Message
 
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Date Registered: 01-2006
TOTAL POSTS: 133
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Re: Poor vehicle earth/ground


Then my comment is that the earth must have been rubbish to start with. If this is the case then sure a rewire will give a noted improvement, but the same can be achieved by pulling off all the ground wires and giving them a simple clean.

I will agree that rewiring your earth points will make the engine run better, but until you get your car on a dyno then I remain unconvinced that any KWs are to be gained.

By the way, I've used Vas for 15 years and sure it picks up rubbish on the outside, just not on the contact point. Doesn't every one use Vas on their battery terminals? Anyway this is a side issue.
26/Feb/2006, 8:21 am Link to this post Send Email PM   Send Private Message
 
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Date Registered: 02-2004
Location: SUTHERLAND, SYDNEY
TOTAL POSTS: 29094
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Re: Poor vehicle earth/ground


Hi Andrew,

The power gains are not something astronomical with this mod, but there are proven power gains indeed.

Have a look at the dyno tests of the Pivot kit for example.

And this is an interesting exract from an article posted on the Nissan Performance Magazine (which talks about rally cars too)

quote:


What are grounding kits supposed to do and do they improve performance? Thanks, Paul

All electrical circuits consist of a source and a ground. The chassis is the ground for cars and all electrical circuits are tied to it. Engine performance relies on how well electronic components are connected. OEM systems are adequate for the job but use small gauge wiring which over time, tends to deteriorate. Grounding kits are meant to guarantee a clean ground to the battery and a better electrical circuit, letting sensors and electronics operate quicker and without as much resistance or noise. Much like when your speakers have interference and are static sounding, the culprit is usually a bad ground. Good grounds are important but are the kits worth the money? If you’re car or electrical experience still includes handholding, it’s an alternative to DIY but with a crimper and bigger gauge wires, you could reground the wires yourself. I recommend using 4 gauge, high audio grade 1666 strand count, 99.99% oxygen free copper wire for the best conductivity. It doesn’t need to be a shielded wire since it doesn’t carry a signal. Newer engines probably don’t need to be re-grounded as their connections have not likely deteriorated. The world rally championship cars use grounding kits and they typically have more advanced electronics where it is most important to have the least amount of impedance in the circuit for accurate and efficient sensoring.



Last edited by jalalski, 26/Feb/2006, 8:38 am


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26/Feb/2006, 8:26 am Link to this post Send Private Message MSN Blog
 
AKAK9 Profile
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Date Registered: 01-2006
TOTAL POSTS: 133
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Re: Poor vehicle earth/ground


If someone can provide an independant dyno reult, then I will concede the point of HP increase. So far all I've seen are people with vested interests.(I'd like to be proven wrong)

Even the article Jalal provides states that detrioation is the problem, not the earthing system it's self.

As to the part talking about WRC cars, forget comparing the standard car earthing system to $1m WRC car. They are nothing alike. I've built ARC cars and the earthing system consists of bus bars. If I had $10,000 to put a bus bar system through my car I'd do it as well.
26/Feb/2006, 6:04 pm Link to this post Send Email PM   Send Private Message
 


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