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Old 12-08-2003, 02:56 AM   #1
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Default Battery Configuration Question

Hi guys, quick question about building battery packs.

I've just ordered some new cells, and this will be my first time building packs myself. My question is this.

Is there any performance difference between building ladder packs or stick packs besides the fact it is hard to equalize them? I run two Evo 3s which are designed for Stick packs and I don't want to modify the chassis if I don't have to.

any thoughts? one more thing, whats the deal with heatshrinking the cells?

thanx guys
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Old 12-08-2003, 03:05 AM   #2
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Old 12-08-2003, 03:11 AM   #3
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yeah i've ordered on of those along with my batteries, though i'd prefer to make stick packs if that was possible as they will fit straight into the Evo
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Old 12-08-2003, 04:05 AM   #4
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Quote:
Originally posted by hawker
yeah i've ordered on of those along with my batteries, though i'd prefer to make stick packs if that was possible as they will fit straight into the Evo
I just made the change from stick pack to side by side. It makes the car a little lighter and lower the CG as well.
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Old 12-08-2003, 04:10 AM   #5
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yeah, though i already have to ad weight to the car, I was just wondering about performance in terms of power from the cells or the like?
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Old 12-08-2003, 04:21 AM   #6
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Quote:
Originally posted by hawker
yeah, though i already have to ad weight to the car, I was just wondering about performance in terms of power from the cells or the like?
Other than the CG, I don't think the performance is any different. You just can't get stick packs with the kind of numbers that comes in matched cells.
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Old 12-08-2003, 05:31 AM   #7
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It's much easier and better to build side-by-side packs, for a coupe of reasons.

1) They'll sit lower in your car.
2) The battery bars you use building side-by-side carry more current with less loss than the thin tabs you need to make sticks.
3) Sticks are VERY hard to make to the correct size at home.
4) Side-by-side's can be individually monitored, discharged and equalized, which are all good things. With a stick, you'll never know which cell is faulty and bringing the pack down if the pack goes bad.
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Old 12-08-2003, 06:45 AM   #8
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it's not encouraged to build ur own stickpacks as normally,connections are done with a spot welder.
if u use regular soldering the wires will protrude and u won't get it as nice as the sticks u'd buy.
I understand there are problems with the Evo III in the battery compartment,but trust me,it's worth the hassle to modify ur cars.
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Old 12-08-2003, 01:54 PM   #9
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alrighty, no worries, as soon as the batteries arrive i'll get started on modifying the chassis. Thanks heaps.
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Old 12-08-2003, 02:03 PM   #10
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Quote:
Originally posted by hawker
alrighty, no worries, as soon as the batteries arrive i'll get started on modifying the chassis. Thanks heaps.
If you like the convenience of the battery holder instead of taping your battery everytime, you can just flip the center support, take out the outer pack holder on the left side of the car, and replace the filmsy foam under the battery plate with foam bumper from HPI. That will hold the side-by-side packs securely.
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Old 12-08-2003, 02:07 PM   #11
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i've got some old TA03 Hard bumpers that are unused, that should do it?
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Old 12-08-2003, 03:59 PM   #12
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Quote:
Originally posted by hawker
i've got some old TA03 Hard bumpers that are unused, that should do it?
I don't know, but the HPI ones work VERY well. Please see the attached picture.
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Old 12-08-2003, 04:04 PM   #13
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they look identical to the ones I have except mine are grey.
Is that a hard or soft foam?
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Old 12-08-2003, 04:05 PM   #14
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Quote:
Originally posted by hawker
they look identical to the ones I have except mine are grey.
Is that a hard or soft foam?
They are pretty firm.
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Old 12-08-2003, 04:41 PM   #15
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If you need more help, let me know. Good luck.

Dan
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