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Old 06-03-2009   #16
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re: Engine Bay Grounding (Earth lead improvements)

Sweet i will make into a guide when i do it, i would do a couple of things different. Shouldnt the chassis ground go to the gear box, Alternator to Gearbox grnd, alternator + to batt + for TB3
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Old 05-10-2009   #17
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Re: Engine Bay Grounding (Earth lead improvements)

Hello.

I've been planning this for ages... Now my new 77Ah battery is resting in the hall, ready to be installed tomorrow. I've also purchased some meters of 21 mm˛ grounding wire. That should be thick enough. I don't see the point of bigger wire, as the terminals limit the flow anyway - really big ones don't fit at the battery negative pole.

Here's the plan:

1. Replace the ground wire to the gearbox.
2. Add ground to chassis.
3. Add ground to ECU.

Then I'm left with 1,5 meters of cable, which is a suitable length for grounding at the alternator mounting. Is it a good idea to ground here?

Morten.
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Old 05-10-2009   #18
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Re: Engine Bay Grounding (Earth lead improvements)

sounds cool let us know how you get on
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Old 06-10-2009   #19
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Re: Engine Bay Grounding (Earth lead improvements)

Quote Originally Posted by Morty Mort View Post
Hello.

I've been planning this for ages... Now my new 77Ah battery is resting in the hall, ready to be installed tomorrow. I've also purchased some meters of 21 mm˛ grounding wire. That should be thick enough. I don't see the point of bigger wire, as the terminals limit the flow anyway - really big ones don't fit at the battery negative pole.

Here's the plan:

1. Replace the ground wire to the gearbox.
2. Add ground to chassis.
3. Add ground to ECU.

Then I'm left with 1,5 meters of cable, which is a suitable length for grounding at the alternator mounting. Is it a good idea to ground here?

Morten.
Our Greek friends recommend (and I've followed):

1. Battery to body (bolt on inner wing by the battery)
2. Battery to gearbox
3. Battery to throttle body/ECU
4. Battery to cylinder head.

Well worth it, in view of the Stilo's propensity for electrical gremlins...

Good luck.
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Old 06-10-2009   #20
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Re: Engine Bay Grounding (Earth lead improvements)

Quote Originally Posted by Yellow Peril View Post
Our Greek friends recommend (and I've followed):

1. Battery to body (bolt on inner wing by the battery)
2. Battery to gearbox
3. Battery to throttle body/ECU
4. Battery to cylinder head.

Well worth it, in view of the Stilo's propensity for electrical gremlins...

Good luck.
Regarding number 4. It's better to ground the cylinder head than grounding the alternator? Will do that then.
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Old 08-10-2009   #21
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Re: Engine Bay Grounding (Earth lead improvements)

Made up 4 wires. Had some trouble with the existing one going from the battery to the gearbox... Didn't know it was split and attached to the frame. Haha. Pulled like hell until I found it bolted tight.

Well. The car starts pronto now, and revs up quickly with no hesitation.

But what is most noticeable is that the amp in the boot produces much more bass! Something is giving the good old Phoenix Gold much more power - and it's most likely the new chassis ground right besides the battery box. See pics below:



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Old 14-10-2009   #22
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Re: Engine Bay Grounding (Earth lead improvements)

It was minus 8C (not the Alfa) this morning. When I turned they key in the ignition the starter engine nearly engaged. It just started. Maybe within 0.5 seconds. 77Ah Varta combined with new earths was a very good investment.
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Old 12-08-2014   #23
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Re: Engine Bay Grounding (Earth lead improvements)

Bumping a really old, but useful thread

I've been running my new ECU without a ground wire for about a year, since I moved it to the battery case (Stilo 1.6). No problems whatsoever.

The mechanic said it doesn't need any grounding. Is this true ? What could go wrong ?
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Old 14-08-2014   #24
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Re: Engine Bay Grounding (Earth lead improvements)

When I tried to undo the nuts on the negative terminal they wouldn't move, even with a half inch drive ratchet and socket. I was in danger of bending the whole unit so I just gave up. Has anyone else had this problem with the nuts in the last but one picture in Stilatos' post.?
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Last edited by jim cooper; 14-08-2014 at 22:09.
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Old 15-08-2014   #25
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Quote Originally Posted by jim cooper View Post
When I tried to undo the nuts on the negative terminal they wouldn't move, even with a half inch drive ratchet and socket. I was in danger of bending the whole unit so I just gave up. Has anyone else had this problem with the nuts in the last but one picture in Stilatos' post.?
Yes I had the same problem Jim. I was lucky to get one of the nuts to shift and ended up putting all the extra earth leads on one post.
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Old 09-04-2019   #26
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Re: Engine Bay Grounding (Earth lead improvements)

Can anyone post what's on the Greek forum thread as I'm unable to register as the site doesn't translate everything when trying to register, so registration keeps failing
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Old 20-06-2019   #27
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Re: Engine Bay Grounding (Earth lead improvements)

Quote Originally Posted by Zeewulf View Post
Can anyone post what's on the Greek forum thread as I'm unable to register as the site doesn't translate everything when trying to register, so registration keeps failing
Nothing much - but very much talk in a language that Google translate cannot translate to any sense.
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