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The need for speed
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Discussion Starter #1
Hey,

I have done some searches here on SF about batteries, and basically found 2 batteries that people usually upgrade to. One, being the optima yellow-top, and the other being the Genesis light-weight battery. What I didn't see in related threads was a comparison between the two.

Some specs I've found about the genesis:
Brand Genesis
Model G16EP
Size 7.15 x 3.01 x 6.65
Weight 13.5lbs
CCA 280
Reserve minutes 28
Capacity Ah (20 hr) 16
Price $70



I am upgrading my battery this winter, because I have a ton of electronics on my car and w/ the new fuel system, I want to make sure my next battery can handle all the drain.

Basically, my car is a weekend driver. It may sit for 1-2 weeks at a time, or it may be started up daily for a whole month. It all depends. I would be willing to throw a trickle charger on it every time I bring it in the garage, that isn't a problem. What I want is the best battery that will handle all my electronics and be reliable. My choices are the optima yellow-top or the new genesis, which I have heard good things about in terms of weight-savings and performance.

My question is, which battery would be best for me if I have the following additional electronics:

-aftermarket speakers/subwoofer (1 alpine v12 amp powering 4 aftermarket speakers, and another alpine v12 amp powering a 8" JL subwoofer)
-fuel system (2 walbros)
-s-afc2,
-fjo wideband
-3 defi gauges
-PIAA fog lights
- VPC
-aftermarket alpine head unit
-greddy bcc


I would like to be able to listen to music without the car running for up to 15 minutes or so, I used to do that quite often on my original battery (INTERSTATE) with no problem. I heard some batteries don't drain too well without the car running, so considering that, which battery would be best for me?

One more question... Would I need an upgraded alternator to handle all of these electronics? What are some of your experiences with different batteries / stock alternator and a ton of extra electronics?

Thanks

mike
 

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I have the 13lb genesis.

If your car sits more that 4-5 days I would recommend having a battery tender hooked up. With your additional electronics it may drain faster.

If you like to sit with the car off and stereo pounding, I would think twice about the genesis.
 

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Use the Genesis PC925. It's the best compromise. 24 pounds and 480CCA.

Later, Steve
 

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The need for speed
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Discussion Starter #4
Thanks for the information. Steve, how do you think the Genesis PC925 will compare to the optima yellow top?


Thanks!

Mike
 

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The need for speed
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Discussion Starter #5
Also, a buddy of mine has the 13lb genesis battery. He says it doesn't like to get too hot, so anyone else here have issues with any genesis battery and heat?

mike
 

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I ran the PC680 for about 14 months. It works, but it gets hard to start if it sits for a weekend. The PC925 isn't going to be as powerful and the Optima, but it will be plenty for the Supra and it weighs aroung 20 pounds less and is more compact. Go to my website in the www below and you can see pictures.

Later, Steve
 

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if your running lots of electrical parts get the yellow top .
 

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mav7, To me it sounds like you just need a good solid battery. If I were you, I would get a stock sized SEARS DIEHARD battery. Those babies are great. Optima batteries have a high failure rate. Do a search on here and find out. IMO, they suck and are overpriced bigtime. The only reason people get them is to rear mount or simply look pretty. The Hawker battery line will not meet your requirements and with your big stereo it doesn't look like you're interest in weight savings which is the only reason to run a Hawker (besides being smaller or rear mounting).

John H
 

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To everyone, it looks like there is some conflicting information about the Hawker batteries. But first, what is the difference between the Oddesey and Genesis line? I couldn't find CA or CCA on the Genesis line to compare. Anyone have a link to this?

Steve, the Genesis line isn't denoted by a "PC" prefix. The 2 Genesis batteries in question are the G16EP and the G26EP, respectively the same size as the PC680 and PC925. Also, the pictures of the PC925 do not look like your battery. [FYI, the www link and the one on your profile don't work w/o tweeking.] Summit also states the CCA as 360, not 480 as you stated. http://store.summitracing.com/partdetail.asp?part=ODY-PC925MJT&view=1024 Of course the battery looks different from yours anyway. :) The PC925 is square shaped. Yours is more rectangle shaped like a normal car batt. Also, the PC680 only has a CCA of 210. http://store.summitracing.com/partdetail.asp?part=ODY-PC680MJT&view=1024 That sucks! I want one of these 4 batteries, but I don't know which to get! Then try to figure out how to mount it w/o buying a $109 mount (not available for the 2 small ones). Of course there's that guy charging almost $200 for one on the forums. :ky:

This is what the PC925 looks like.



Then this is what your PC925 looks like.

http://www.geocities.com/steve_jarvis_me/P1010208.JPG I didn't display w/o permission.

John H
 

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The need for speed
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Discussion Starter #10
John, thanks for the input.

The hawker and genesis are the same exact battery. There shouldn't be any difference. They are all dry-cell batteries and basically all have the same shape and size. Go here to learn more about them: http://www.stealth316.com/2-dynabatt.htm . That site also gives a great comparison between the optima batteries...


The odyssey PC925 measures 6.69x7.05x5.04, weighs 26 pounds, has 470CCA, and 53 reserved minutes. It's capacity is 28Ah (don't really know what that means). They sell for around $100.

The optima red top measures 10 x 6.88 x 7.81, weights close to 40lbs, and has 750CCA / 104min of reserve w/ 55aH. The yellow top wasn't listed in the chart.


As far as the reliability issueus of the optima, I will have to do a search. I thought they would be pretty reliable. I am looking for a smaller battery becasue the interstate I had in there before was a very tight fit, and I want some room to mount a custom fuse-box for all my electronics. The Optima was nice because it had 2 sets of terminals, so you didn't have to run everything on one connector.

If the genesis PC925 can't even keep up with what I want, then I may be forced to going with a conventional battery (my interstate battery worked great). I heard that dry-cell batteries don't like to be warm and thats why many people mount them in the trunk. I don't wish to do that, so I am relying on your opinions to make my decision.


Thanks
mike
 

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The picture of the PC925 is my exact battery. The difference is mine is mounted on it's side.

Here is a list of the electronics in my car.

ESCORT SR1 remote radar detector
APEXI Super AFC (fuel computer)
APEXI AVC-R (boost controller)
APEXI ITC (ignition timing controller)
ECLIPSE 5341R deck
ECLIPSE 5961 in-dash 6-disc cd changer
JL audio speakers in stock locations
2 10" JL audio subs in custom box
ALPINE MVR-F405 4 channel amp
ALPINE MVR-1005 2 channel amp
ALPINE alarm

The battery works great for me, but the bracket was a little on the pricey side.

BTW this battery has been in the car for approx. 1 year including the heat of running the roadcourse. Even mounted under the hood I have had no problem.

Later, Steve
 

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The need for speed
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Discussion Starter #12
Glad to hear your input steve. It's worth a shot! Have you ever thought of making a custom bracket yourself? I think I may do that.

Thanks

mike
 

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FWIW, I had a optima(red top though) start going through a meltdown and luckaly cought it with only a melted hood(cowl hood)
This was on a 94 Cobra/Saleen with a T76. The car was off also, and was not hot. Dont know what happened or why. Put in a standard replacement battery and the guy is still having no problems(sold it about a year ago)
 

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Steve Jarvis said:
The picture of the PC925 is my exact battery. The difference is mine is mounted on it's side.
Ok, that explains everything. :doh:

mav7, that link was an interesting read. As attractive as the G16EP's weight is, I think the G26EP more suitable despite the weight increase. But for me weight is the sole issue. uhhg.

With the custom bracket, I was thinking get 2 bolts thread on each end as well as some alunimum angle brackets and if I can find it flat aluminim bars - like 1.2 an angle bracket.

Without going into too much depth yet, is there anything that can be used to bond peices of aluminum together like JB Weld? I would like to make a rectangle out of it as a perimeter base for the battery. And the bolts would support the flat peice on top.

John H
 

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My Optima Red Top works great with the PHR Street alternator. I have two 10" Subs running at 500W each and with a few electronic extras I have no problem and can lisen to the radio for about an hour before I have to get in and crank the supra back up. I would recomend the yellow top though becasue it can sit longer when the alarm is armed. My red top goes for about two weeks without a start, the yellow should last bit longer though.
 

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i have the odyssey PC925 also. i love it. i just heard you shouldnt have you car sit for around 2weeks or more because it can drain easily, but you can just disconnect the negative anyways. its around $150+, i dont think it weighs 26lbs.
 

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TRD94JZA80TT said:
i have the odyssey PC925 also. i love it. i just heard you shouldnt have you car sit for around 2weeks or more because it can drain easily, but you can just disconnect the negative anyways. its around $150+, i dont think it weighs 26lbs.
How did you mount it? I'm not a baller like Steve to pay more for the mount than the battery itself. ;) You don't think it weighs 26#? How much then?

John H
 

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If you think I spent too much for the bracket, you should have seen my face when I realized the battery cable ends cost $40. :eek:

Later, Steve
 

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Steve Jarvis said:
If you think I spent too much for the bracket, you should have seen my face when I realized the battery cable ends cost $40. :eek:

Later, Steve
Ouch. Are new battery cable ends required? From what I can see yours look nice, what kinda are they? Oh, and was there a reason for mounting on it's side?


John H
 

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TRD94JZA80TT said:
i have the odyssey PC925 also. i love it. i just heard you shouldnt have you car sit for around 2weeks or more because it can drain easily, but you can just disconnect the negative anyways. its around $150+, i dont think it weighs 26lbs.
Battery not connected, no security alarm! Also, resets ECU every time - on my car w/ VPC, initial throttle response sucks for the first 15 min after ECU reset.

I may pick up the 13 lb battery and just put it in to go to the track. That is a cheap, weight saving option. And since I reset the ECU before the track anyway, would work out okay.

Al
 
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