sflgator

Please no flames on this question ...

Just out of curiosity...

Has anyone ever thought of using a decent 7-10 wire Engine Grounding Wire Kit on the C63 AMG? I had a 10-wire kit similar to the one below on my '04 Infiniti G35, and believe it or not, I actually felt a difference...smoother and faster shifts (especially in ManuMatic Mode) and a tad more power near redline.

Now, I know the MB C63 AMG is no Honda/Acura with the "V-Tec kicked in Yo" thing, lol. But seriously, maybe these grounding wires make more of a difference in smaller 4 or 6 cylinder engines with lower power..IDK???? Just curious guys...that's all. btw -- I don't belive their claims of ~ +3-7HP gains and 10% increased fuel efficiency, but I did actually notice a slight difference in my G35 with the V6 VQ engine (especially with the smoother, faster shifting from the grounding wire to the TCU).

What do you guys think?

Sun Auto Hyper Grounding Kits

Click to enlarge


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bushburninc63

Had a diy kit on my evo, didn't feel anything. even if there is, i doubt if you can feel an increase in a few hp.

sflgator

I guess I was thinking more in terms of slightly faster shifts, etc.; and yes, I agree you wouldn't be able to "feel" an extra few HP on a 451-515HP car.

Sincity

Funny, I had one on my FX-35 and the engine seemed smoother as well.

sjhugh

I’ve heard and read arguments for and against these kits for years for all manner of vehicles and have never seen proof either way. I even tried it on an old school 350 Chev a life time ago and can’t say I noticed anything. There is definitely something to be said for improved grounding for smoothing out the spark but it is one of those relatively cheap mods you do if you want.

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PTE

Back In the day. with Drag Boats I always ran a ground tag from the Cylinder head to the Block. Everything was bolted , , No Plug in connectors. We had no ignition issues , with Hi frequency Multi spark CDI or inductive ignition , what we did have was lots of RF noise. Which screwed up our data logging. The electrical return path would open up in the ground system with heat between the heads & Block.

Think of what our MB cars have , Tons and miles of wiring, ground points mostly within the cars wiring Harness, that attach to the car chassis. Just one bad / loose Crimp connection . Plus , the sound insulation along with sound Isolation & rubber mounts, ( engine & Trans to a sub frame) & then rubber mount the sub frame to the car. There is a potential for open ground returns. Add on grounding systems can not hurt. Cheers _PTEngineering

emericr

My only concern would be that if there is any electrical failure, the dealer will be quick to point out that you have modded the car. I would not take the chance.

sflgator

I understand your concern, but it would be difficult for a dealer to blame some type of electrical failure due to extra Engine Grounding Wires.

sflgator

I guess that's kind of what I was thinking..."it can't hurt."

emericr

I have seen amazing denials from our local dealers (like my tint caused malfunctions in the built in radio antenna in the back window...) so I would not be surprised that they could blame it on this mod. I agree with you that that does not make sense but common sense does not seem to be well regarded these days.

bhamg

I was stranded once by a ground problem in my M5 so this kit interests me...I did not know such kits existed...are they a PITA to install?

Sincity

Easy. Unless the kit was not pre-cut for the car.

sflgator

Easy to install as long as you know which points to attach each side to. And, as far as electrical problems in your M5, well it's a BMW that is known for electrical "gremlins." I remember one day I was driving across the state of FL in my BMW 335i and all of a sudden, my whole dash light up like an X-mas tree...like 6 error lights at one time!!!!????!!!!! I immediately called my SA and asked him if I was going to die if I drove it (as it still drove perfectly normal). He spoke with his Tech and got back on the phone to say it was probably just a sensor malfunction...and guess what? It was. Not to mention the continuously malfunctioning left rear brake light due to a simple bad connection in the light assembly (2nd one after the first one was replaced).

Most MB's don't seem to have these issues.

gsrjc

I had one on my IS300 but since the newer MB cars have so much electronic stuff I would be hesitant to put one on as it might mess up the electronics of the car.

bhamg

I would think the opposite...that maybe it's an insurance policy against electronic component failure.

sflgator

+1. Yeah, I don't see how an engine grounding wire kit could mess anything up. The question is really whether or not anyone would feel any difference in performance (faster shifting, smoother, etc.)?

gsrjc

I know that when I had it in my IS300, it got rid of all the whining noise from my aftermarket sound system. i don't know about shifting since it was a 5 speed. some friends noted that their automatic shifting smoother and the idle wasn't bad in the mornings.