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| Battery recommendations (Page 3/3) |
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ZaraSpOOk
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DEC 22, 07:06 PM
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whatever battery brand you get, get the traditional post and change the cable ends instead of those threaded ones, or get new cables all new cables
and also the GND wire, add one to the rear deck lid mounting bolt, and replace the one that goes to the frame with something beefier and make sure any corrosion is cleaned up
a plastic body car, you need good GND's
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pmbrunelle
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DEC 22, 07:29 PM
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| quote | Originally posted by theogre:
But other vehicles have Front Mounted batteries when made...
And those setups have been design and tested to resist battery shorting out in a crash.
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On that topic, the Fiero ECM supplies 12 VDC to turn on the fuel pump relay.
This is contrary to the usual way of switching loads (such as the injectors), which is to provide a path to ground via an NPN transistor or N-channel MOSFET.
With the usual switched-ground method, in a crash, if wire between the ECM and fuel pump relay coil is pinched and shorted to ground (i.e. the spaceframe), then the fuel pump relay will stay energized, potentially pumping fuel into a fire.
By doing it the GM way, if the relay coil wire is shorted to ground, the relay turns off. This is safer in a crash.
I modified my Fiero to use a switched-ground fuel pump relay coil, and I am realizing that it was a mistake.
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theogre
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DEC 22, 10:11 PM
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Folks,
Battery shorted can dump 200 to 300 amps or more and easily start a fire. Just to run the Starter draws 120 to 140 amps when everything is 100% normal. Iffy parts can easily draw 180-200 amps. (And all parts Hate this. See my Cave, Electric Motors)
A "crushed" battery can dump a lot of amps too.
Even big Welding cables can light up fast when you have a battery short. These big cables may make worse problem in a crash because will try to stay shorted longer then 4 or 2 AWG cables. (Most B-cables are Metric wire size but doesn't matter for now.)
| quote | Originally posted by ZaraSpOOk:
whatever battery brand you get, get the traditional post and change the cable ends instead of those threaded ones, or get new cables all new cables
and also the GND wire, add one to the rear deck lid mounting bolt, and replace the one that goes to the frame with something beefier and make sure any corrosion is cleaned up
a plastic body car, you need good GND's |
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Changing to Top Post battery for Fiero isn't a good plan. And Not good for many other models either.
For OE Fiero location just drop the vent can short the battery. Need to add + post insulation but even that can have problems. For Fiero and more is just not much Clearance for either.
If battery comes loose for any reason, very easy to short out the battery. Post Insulation often doesn't work when hit repeatedly driving on bad roads let alone a wreck.
For Fiero Front Batteries often have problems w/ top post types for other reasons, similar or same problems as any front mount side terminal for Fiero.
I had one of universal top and side terminal batterys in my Fiero because that all the store had at the time so I know there is a clearance and other problems. I kept both top posts cover w/ insulation came on and built in handle to keep the vent off of them.
Yes, New Battery cables are good. For Side Terminals... Use Only ACDelco sets. Not lead battery ends come w/ most aftermarket cables.
ACdelco has "updated" OE battery ends and Better because can remove the plastic cover and coat metal w/ brake or silicone grease to stop "water" eating them.
I avoid "Generic" ends even for tops post battery.[This message has been edited by theogre (edited 12-22-2021).]
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theogre
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DEC 22, 10:28 PM
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| quote | Originally posted by pmbrunelle:
I modified my Fiero to use a switched-ground fuel pump relay coil, and I am realizing that it was a mistake. |
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😟 Yup
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theogre
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DEC 22, 11:46 PM
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😕 😬  Just trying to lookup batteries at Walmart online...
Don't know what is wrong but no battery but high $ AGM listed for Fiero.
I say Just get Maxx group 75 but online have have problems any Maxx batteries which is very weird in the recent past.
Had google to search walmart EverStart maxx 75 and not available at any store near me.
Sucks because AZ and other 3 year warranty is $100 more.
Note: Some stores w/ repair bays maybe harder to find any batteries because will install them almost as fast as truck deliver them.[This message has been edited by theogre (edited 12-22-2021).]
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2.5
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DEC 23, 12:00 PM
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| quote | Originally posted by cvxjet:
.......Diehard has....died.
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and so close to Christmas too
 [This message has been edited by 2.5 (edited 12-23-2021).]
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ZaraSpOOk
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DEC 23, 04:54 PM
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I suppose I should post a pic, but it's cold out, my top post battery doesn't even come close to the vents
the nice thing is, easy to jump if needed, easy to add extra GND wires, in fact just about everything is easier
and as for coming loose due to bad roads, I find that's one good thing about the GM design, if you have the bolt and battery holder in place and snug, it ain't going anywhere
it is just my suggestion, your car, do what you want
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