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Old 03-05-2003, 06:12 PM   #1
jasona
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Default grounding mod...

Okay, I've heard a lot of talk about it, but I'm still skeptical. I mean, I find it hard to believe that if it actually makes a noticable difference, Subaru doesn't just ground it better from the factory. I know a lot of people say they can "feel" the difference, but does anyone have any acutal proof that it works?

I'm going to the strip this weekend, I'm thinking about making a few passes on and off nitrous, then doing the grounding mod at the track, making a few more runs on and off nitrous, then seeing how much of an average gain/loss there was, if any. So, is this mod seriously even worth the effort?
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Old 03-05-2003, 06:28 PM   #2
jasona
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Default

also, how should i go about this to make sure that another factor isn't causing the results? ECU reset BEFORE i do the mod, when i do my "control" runs, as well as reset after the mod?
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Old 03-06-2003, 02:47 PM   #3
Hawk296
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Ide like to see some proof as well. I can not see how on a modern computer controlled (digital) car this can make any difference.
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Old 03-06-2003, 03:11 PM   #4
ciper
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Many vehicles sold worldwide offer additional grounding as an option from the dealer....

Also realise how many additional grounds subaru adds after the fact, for example why would the subaru add on filter "recall" for early 4eat include and additional ground?!

I also remember reading about eratic shift behavior when the ground wire for the starter was corroded.

A simple test is to meaure around the vehicle and find high resistance between two surfaces that are supposed to be grounded. You will find that resistance value changes. Since most important items to keep the engine running properly (sensors) DO NOT have a return ground they are using the engine itself. If you are able to "zero" all the grounding surfaces readings should be more accurate right?

Some of the people who have done the ground mod have gone crazy, running wires all over the place. Others didnt do enough.

I did the mod using left over wires and clamps, even some braided ground straps I had laying around for equipment. My idea was to tie the following items together:

Left frame rail near front
Right frame rail near front
Center firewall
Battery
Engine
Transmission

You can purchase "starter ground" cables from parts stores that are super heavy duty and holes on either ends for bolts.

I suggest that you guys just try it out and see what happens. You can grab a good length of bulk cable and a box of ring connectors for less than 10 dollars.

If it makes no difference then consider it an experiment. If you enjoy it come back and post.
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Old 03-06-2003, 03:39 PM   #5
watcher in the sky
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Default Re: grounding mod...

Quote:
Originally posted by jasona
I mean, I find it hard to believe that if it actually makes a noticable difference, Subaru doesn't just ground it better from the factory.
Cams, full exhaust, turbo, 20 mm rear sway bar, bigger brakes, and many many more things make it better from the factory IF SOA wanted to do that. The way i see it, is that they (SOA) probably didnt do it from the factory for the same reasons you and everyone else wont. Not that that is bad, it's just a reason, I think... skeptical in something that seems so mundane, when in reality it is something that should be done for various reasons. See that at the top of the page? click Here and read all of it, and i mean all of it, there is some highly usefull info.

there is just one slight prob... if you've done your research, you will see that ALOT of 02 rs's that did this mod, didnt feel a thing... in other words, they may be grounded correctly already.
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Old 03-06-2003, 07:46 PM   #6
Kevin Thomas
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Default Re: grounding mod...

Quote:
Originally posted by jasona
I'm going to the strip this weekend, I'm thinking about making a few passes on and off nitrous, then doing the grounding mod at the track, making a few more runs on and off nitrous, then seeing how much of an average gain/loss there was, if any. So, is this mod seriously even worth the effort?
Forget everything else that you read and just do what you said above. Then you can decide if the mod is worth it. I rather spend $10 bucks and test this out then to spend $250.00 on an intake that people say they can feel.

I'd particularly look for a difference in your 60ft, 1/8th, and 1/4 mile time. Your 1/8th and 1/4 mile speeds I'd imagine would be about the same with 1-2/10ths off your 1/4 mile time (no more than 4/10ths). Good luck!
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Old 03-07-2003, 12:01 AM   #7
Dolphin Overton
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If you have to go to the drag strip just to prove it shaved a thousanth of a second off it's not worth it. I can't believe how many people have fallen for this. I admit I tried it. Biggest waste of $10 I have ever spent.
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Old 03-07-2003, 01:06 AM   #8
watcher in the sky
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how many miles did you have on your car when you did it. No offense, but why would me or anyone else say that there is a definite throttle response increase if there wasnt? I have driven my car in all ways imaginable it seems for 53kmiles and I know how it reacts to jamming the throttle whilst holding it at a given rpms.. and i do in fact know that there was a definate increase in that response after the mod, and unlike resetting the ecu, it has gotten smoother and "peppier" ever since, but i doubt it will get any moreso. The ecu did infact relearn, dont know what, but it did, and what ever it was, was a plus, not a negative.

I really dont know why you didnt have any luck with this, but why is every one saying they spent 10 bucks? I spent 3 dollars...
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Old 03-07-2003, 05:46 PM   #9
DJ 9iron
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I didn't spend anything on mine. My friend had some amp power and ground wire laying around, so we did it. FREE. If it doesn't work, which I think it does (a little), then oh well.
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Old 03-08-2003, 12:28 AM   #10
Hawk296
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I still dont understand, if it works, how it does so. The only explanation I have found is that it allows the ECU to "think clearer" or something. WIth that being untrue I would like to see some proof to HOW it works, if it does. I could go out and try it myself but how would I know that its not that extra 1 degree F in my intake temperature or that .01" of atmospheric pressure or the gas in my tank or any combination of the above? Are you saying its the sensors that are giving a more accurate signal after better grounding? grrrr it doesnt make any sense to me.
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Old 03-08-2003, 12:35 AM   #11
live311
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Quote:
Originally posted by Hawk296
I still dont understand, if it works, how it does so. The only explanation I have found is that it allows the ECU to "think clearer" or something....Are you saying its the sensors that are giving a more accurate signal after better grounding?
Actually, you're pretty much correct. The sensors send voltage signals to the ECU to interpret. Using high-quality wires and contacts lowers interference and resistance and cleans up the electrical signals, theoretically. Using well-insulated ignition wires would probably do more to lower interference than any grounding mod, though.
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Old 03-08-2003, 12:41 AM   #12
watcher in the sky
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you know, you all should read the stick on here.. and click on the link about the grounding modification.
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Old 03-08-2003, 04:41 PM   #13
joefocker20
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I might try that..
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Old 03-08-2003, 04:52 PM   #14
watcher in the sky
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sticky! not stick... lol.. sorry.
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Old 03-08-2003, 07:10 PM   #15
Russell Rogers
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Default I did this mod for about $60

I spent quite a bit on this mod because using 12 guage wire is not sufficient. To do this just like a kit ,which do have power gains, one should use car stereo power wire. I use 4 guage wire from the battery to a distribution block. Then from there I use 8 guage out of the distributin block to 4 grounding contacts. 1 on each strut tower and 1 on each side of the intake manifold. Its that easy. My cars got little power gains, BUT my hesitation from stop and when I punch it is 98% gone. Anyways, to get this done correctly use High quality materials. It will work better in the long run and they mod will be more sufficient. Good luck
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Old 03-08-2003, 07:44 PM   #16
obyone
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Most people waste a lot more than $10 through out theire entire modding experience on a car... I think of ground mod like this, "It's cheap, looks good when done correctly, and maybe it'll help in performance, but it's still cheap and easy to do."
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Old 12-31-2007, 06:21 PM   #17
IMjustWRXed
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Quote:
Originally Posted by jasona View Post
Okay, I've heard a lot of talk about it, but I'm still skeptical. I mean, I find it hard to believe that if it actually makes a noticable difference, Subaru doesn't just ground it better from the factory. I know a lot of people say they can "feel" the difference, but does anyone have any acutal proof that it works?

I'm going to the strip this weekend, I'm thinking about making a few passes on and off nitrous, then doing the grounding mod at the track, making a few more runs on and off nitrous, then seeing how much of an average gain/loss there was, if any. So, is this mod seriously even worth the effort?

THAT SOUNDS LIKE A SMART IDEA... ALTHOUGH I DONT THINK ULL GET ANY BETTER TIMES AFTER THE GROUNDING MOD... AS I DONT THINK IT REALLY GIVES ANY POWER ,,, JUST PERSONAL PREF. AS IT RUNS ALITTLE SMOOTHER THAN BEFORE, BUT HELL U NEVER KNOW!,,
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Old 01-01-2008, 03:41 PM   #18
SilverSubie2.5
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This thread is almost 5 years old man, come on.
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Old 01-01-2008, 03:43 PM   #19
EdHilario
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Newbs like to necro
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Old 01-01-2008, 03:56 PM   #20
jakeachy
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+1 for searching
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