I have couple friends who have Nissan 350Z. They installed a set of aftermarket ground cables and gain 5 rwhp. I wonder this grounding cables works the same magic for C5?

 

If giving the car a better ground ups 5hp than I would take the car back. Is that the added ground wire in yellow? Why are you grounding to the valve cover when they are isolated from the block by the gaskets? The coils are isolated also. Where does that connect back to the battery? All that yellow looks pretty but if you really wanted to get the job done you should run a 4 ga from the battery to the frame and another from the battery to the block....job done.

 

Here are some other photos. There are a total of 5 cables. One cable is routed to the battery -ve and two are routed to each side of the frame rail.

 

If you're really getting 5hp from grounding, it wasn't done right in the 1st place...

 

You can get more than 10 HP with stickers... I think unless you saw a before and after dyno sheet they're pulling your leg.

Z06vettepilot

 

LMAO

 

the amount of pictures won't help any.

Years ago there was a Nissan or Toyota (too long ago to remember the exact car) that had an engine grounding problem. It was just one car model - during just one model year run. Adding additional grounds cured a design flaw.

That was years ago, If your current car is not that specific older car, and if your current car does not have a known design flaw of poor engine grounding - then your just falling for folklore of days gone by.

I think it's still being done today IMO (to cars that don't need it) because it's something a guy can do to his car himself - in his own (or his parents ) driveway.

If it's a 5hp boost to add grounds to a car that doesn't have the design flaw... then it's an "emotional" 5hp boost.

And BTW, how can one detect a "5 hp increase". Heck; back to back dyno runs will vary more than 5hp.


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No personal offense meant but I think the only magic from this mod would be $$ disappearing from your wallet.

 

Another answer to a problem that doesn't exist!

Looks ridiculous.

 

 

so much said... with so few words.

 

Not to mention you are burying yourself with the pics...a ground to throttle body? Come on man...it is mounted to plastic. You had good intentions but poor execution.

 

The weight from the additional ground cables would eat up 10 HP!!

 

 

Not to be an *** here but I laugh at the ignorance of some of you... Grounding kits are proven power on ANY car, and the proof lies in our own dyno, as well as many others. Just because import car owners use it, or its not a cam swap / header install / 1970s tactic for power doesnt mean its ricerish or doesnt work. Ive personally watched a WRX pick up 14 rwhp from a grounding kit, as well as a Nissan 350Z make 7 rwhp... In EVERY FBody I do this in there is a noticable difference in how clean the dyno looks up top in the powerband, as well as better power to lights, accessories and stereo system!
While I build my own power / ground kits instead of paying larger manufacturers for them, I still charge similar and I have yet to have even a single guy say it was a waste of $150 bucks. Want proof? check out www.azfba.com and look under my forum in the grounding section... at least 20 satisfied customers that have used it on that forum alone!

If anyone locally doubts me I will offer a before and after dyno on the grounding / power kit, and if it doesnt make the power I will refund the grounding kit price 100% (dyno time still needs to be paid for)... however if it does make at least 5 rwhp, or better the charachteristics of your electrical system you have to post on here how much of a difference it made and put a "I Love Grounding Kits" sticker on your back window for a month!

 

Also in answer to others posts... its not GMs fault for doing the factory ground system incorrectly, its just inefficient compared to the aftermarket system.

Think of it this way... you take a Fosgate 1000 watt amplifier and put a 10 gauge power and ground wire to it. Sure it works fine, it gets the job done and it costs very little because all the other amps can run off it fine...
All im doing is taking that run of the mill grounding system GM puts on every car and overengineering it to that of a high performance engine! The 1000 watt amp likes the 4 gauge wire better... why wouldnt a 400 horsepower LS1 like a better grounding system over the one that they share with a 120 horsepower cavalier?

 

 

On a side note... the instructions that come with some of these grounding kits are kinda genaric... you have to make a few changes when using their diagrams to plan your grounding kit out!

 

 

Hmmm...I've been working in electrical engineering for 30 years in Naval missile systems and telecom here in Silicon Valley and I can tell you that the C5 has very good grounding. Because of the fiberglass body, GM ran ground returns everywhere with grounding blocks located all over the place. They had to do this on the C5 because of all the networked computers and control modules or they would operate intermittently and throw codes constantly. Unless these blocks become corroded as Bill Curlee legitimately pointed out in earlier posts, they work just fine. Sorry, I personally wouldn't spend my money on it, but I have to admit it definitely looks fast