Customs Odyssey battery VERY impressed so to speak

So I've read plenty on here guys are using the odyssey pc680 battery on a sbc and they rave about it. I read they barely hit the key and wham! Starts every time. so i picked one up and as far as i can say is I'm not impressed. It does not start my 1968 327 sbc it barely turns is and turns it slow. I even tested it before i hooked it up and it showed 12.89 so it was fully charge according to the instruction manual.


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Will a regular batter start it with the same cables?

 

Yeah but i was throwing a booster on a reg batt my nieghbor let me borrow.


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Im using 8g wires


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Are you saying the borrowed battery that was week worked better than a new battery? HRP

 

So normal battery won't start it either.
Can't really blame or praise any battery here just yet.

8 is way to small to crank a 372.
8 is suitable for maybe a twin cyl BriggsBriggs and Stratton tractor

So how long are your battery cables

 

Plenty of things it could be, before you blame the battery ...

Where is the battery mounted?
Do the battery cables get hot (8G sounds a little small)?
Do you have a good earth from the Chassis to the engine?
Are all the battery connections and grounds clean?

 

Now that you mention it that most likely the problem. I have the battery in the rear of the sedan. So theyre lonnnng.... it was a 327 btw.


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8 gauge won't cut it

 

Back of the tudor sedan
Only reason i used 8g because it came with the wiring block from keep it clean.
All connections are fresh and new.


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Well I'd be guessing you need thiiiiiiiick cables if they are looooonnnnng

 

31 Vicky is correct. 8 gauge wire isn't even close to Cable size. I'm probably one of those guys you've read about raving about the Odyssey Batt's. I have 4 of them, all connected with proper gauge cables. My avitar has a S.D.C. and the Batt in the trunk. No issues with #2ott cables.
The Wizzard

 

lmao....im startin to think that .... What gauge.. 4g ?


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http://alternatorparts.com/wire-size-chart.html

Here's a chart, first I found

 

I d k if it was you.... Your avatar doesn't look familiar but i wasnt tryin to come off as disrespect. Thats the only problem with text message shit can read emotion



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2/0

 

Yikes....is 0 or 1 gauge not the thing to do anymore ? Long run there. Okay, never mind. Fast typers prevail.

 

That's what I used with my truck. HRP

 

Yep, those battery "cables" you have are way undersized. You should have at least 4 ga, maybe 2 ga. Number 8 is good for a trolling motor and that is about it ! I bet that little number 8 wire gets pretty warm when trying to crank the motor !

I had a PC680 in my 23 and it started the 350 sbc like gangbusters for the 5 years I owned the car. The car would sit for months at a time and it would still crank great. The battery is only one part of the total starting circuit. Put some correctly sized cables on it, and run the ground cable (same size as the positive) right to the starter area. It can be the bell housing or a starter bolt, but you want a good ground right at that spot.

If you do that you will have a car that starts like it should.

Don

 

Replace all 8g even the on off the alt. does that include the ground


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No disrespect taken. Just giving you the gauge size that works for me along with those Grate batteries.
The Wizzard

 

Alright will do


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The ground cables are reg size cable from pep boys btw



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Yes. HRP

 

For sure thanks


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Yes, the ground too.

 

I d k why keep it clean would send 8g with a sbc wire harness...


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2x

 

I have a pc680 and it kicks my 10:1 327 over just fine.


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Normally,the battery is mounted close to the starter,not 6 foot away. HRP