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» Termpro Audio Forum » Component Specific Topics » Alternators, Batteries, Interconnects » Dropping a battery into water to figure out cubic inch displacement?

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Author Topic: Dropping a battery into water to figure out cubic inch displacement?
dB Don
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Is this ok to detemine if the battery is over 650 cubic inches?

Seal the terminals then drop it in water would be a good way for alot of current batteries and you would get EXACT cubic inch displacement.

ok or not?

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-Donald Hebig

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Wanna-B-Basshead
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use sand of something... just tape everything up

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Travis Atherton
Former Team Music Masters member
2005 World Finals – Street C
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AMPS FOR SALE! 2X FUSION 4000D's, PM for price

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Wagonized
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packing peanuts would be your bet.

but why not just measure it with calipers?

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Dustin Page
97 explorer
155.8
Team Deaftraps

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scottiej
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Water would be fine... as long as it is a sealed battery. No need to cover the terminals either.

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Scottie Johnson
Sound Pressure Technologies

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ShockingCanada
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good luck measuring a group 31 blue top with calipers...this is the only method to do it and it may actually be less than 650 if you consider the odd shape it has

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2008 Spring Break Nationals Street B Champion 153.2dB
Street A 154.1db
2 TF One 10" + DD Z1a + Odyssey 1750

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tommyk90
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I was actually wondering about the G31 optimas since they have that weird shape.

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Competition setup:10" DD 9510, kicker zx2500, ~ 2 cubes, 151.2 on the TL(in the kick, 43 hz), 145.0 legal.

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dB Don
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[Wink]

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-Donald Hebig

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Mazda SPL
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Do you think that the G31 can be permitted if is it below the 650 cu?

[ 02-27-2008, 06:24 PM: Message edited by: Mazda SPL ]

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I'm sorry for my bad English language...
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Wagonized
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i really dont think its below 650 ci

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Dustin Page
97 explorer
155.8
Team Deaftraps

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ShockingCanada
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its quite hard to know because there is alot of wasted space on those batteries. Even if you take the max measurements its less than 800 and then there is all that airspace you can remove because of the odd shape

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2008 Spring Break Nationals Street B Champion 153.2dB
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AudioXtremes
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Per rules

The physical size of each battery is calculated from the physical dimensions of the battery. (Height x Length x Width excluding the battery terminals) The physical shape of the battery is irrelevant.

So its actual displacement doesn't matter. It's the batteries maximum dimentions.

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Team Sundown Audio
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teamsplnoobs-kyle
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the group 31 is smaller then 650 cu in if you do the math, and if you drop it in water.

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dtbrown
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yah, but I think they use max dimensions of the battery for measurements. Ask a judge.
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Mr Bump
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Don, a tape measure will suffice if you are thinking of the battery I am.

Measured and approved [Wink]

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Ben
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UK SS 1-2 NW Record Holder
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Mr Bump
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No where in the rules does it say Maximum, its says the batteries physical dimensions, if the battery isnt 100% square its actuall dimension will still dictate its CI.

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Ben
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Tinted
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quote:
Originally posted by Mr Bump:
No where in the rules does it say Maximum, its says the batteries physical dimensions, if the battery isnt 100% square its actuall dimension will still dictate its CI.

LOL tell us then what are the exact physical dimentions of this particular battery?

This battery is not legal for St. A. Let's deal with it and move on.

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2007 Street C - 154.8 Certified
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Mr Bump
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And youve asked a judge?

[Wink]

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Ben
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Tinted
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that's what the rules say. the shape of the battery doesnt matter. you supposed to measure it by whatever dimentions are given in the manual. and by those dimentions the battery is a no go. this is not rocket science.

also, do you really want people dumping batteries in the water to figure out the volume? think about it.

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2006 Street A - 152.7 Certified
2007 Street C - 154.8 Certified
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2008 Street B - 155.5 Certified

TEAM FEAR OF BASS

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Mr Bump
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Its doesnt take water.

Can use sand.

Anywho, a battery in water will be fine.

Tottie even agrees, you going to argue with him?

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Ben
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www.EastCoastChoons.co.uk
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Team UK - Team ECC - Team RE - Team DD
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Dann
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12.75*6.5*8.75 = 725.16 in^3 , it will definitely displace less than 650 if dropped in water

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Daniel Padilla
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Amplifier: Digital Designs Z1
Subs: 2 DD 3510's
152.4 Street A
www.DbDragPR.com

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Empire Audio-Mike
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quote:
From Rulebook:
6-8i Competitors in the Street A class are limited to a single 650 cubic inch (10652 cubic cm) or smaller battery. Competitors in the Street B class are limited to a single 800 cubic inch (13110 cubic cm) or smaller battery. Competitors in the Street C class are limited to a maximum of two each 800 cubic inch (13110 cubic cm) or smaller batteries.

Additional Guidelines:

* Only "standard", 12-volt, 6-cell (connected in series), lead/acid or gel-type batteries are permitted in the Street Division.
* Aftermarket batteries are acceptable provided no other applicable rules are violated.
* Hybrid (ie 12/16 volt) and/or custom-made batteries are prohibited.
* The physical size of each battery is calculated from the physical dimensions of the battery. (Height x Length x Width excluding the battery terminals) The physical shape of the battery is irrelevant.
* The primary battery must be located in the same general area as the OEM battery location. (For example, if the OEM battery location is under the hood, the primary battery must be located under the hood as well. Aftermarket battery trays and/or custom fabricated battery brackets may be installed provided no other applicable rules are violated.)
* The secondary battery (if installed) may be mounted behind the B-Pillars or under the hood provided no other applicable rules are violated.
* Batteries may not be mounted underneath the vehicle. (Underbody battery boxes, racks, etc. are prohibited.)
* Batteries may not be swapped out during the course of an event.
* Batteries that are designed in such a manner as to circumvent the above rules may be deemed illegal by the dBDRA.



It does not say the displacement of the battery it says size. It also says the physical shape of the battery is irrelevant. This means it doesn't matter if its round and square. its based on dimensions of the battery.

When you measure the height,length or width figure out the smallest square you can slide the battery through.

It doesn't say the average dimensions or the volume.

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Just some thoughts from a nobody. [Smile]
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Mr Bump
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Mike, batteries need to be under a certain cubic inch limit. Cubic inch is a measurement of volume.

If its under 650ci, which it is, it will be used.

Nowhere in the rules does it say maximum, it says physical. If it isnt a standard 6 sided shape how else do you determine volume? Either actual dimensions or displacement. Physical shape isnt discriminated against.

Its legal.

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Ben
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www.EastCoastChoons.co.uk
UK SS 1-2 NW Record Holder
Team UK - Team ECC - Team RE - Team DD
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Empire Audio-Mike
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thats correct. It also doesn't say that it isn't maximum.

If you were going to sell the battery to a customer and he wanted to know how big it is in order to see if it would fit into the battery tray what dimensions would you give for the battery?

Would you get out the sand/water/packing peanuts or would you get out the tape measure to figure out what will fit into the battery space in the car?

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Just some thoughts from a nobody. [Smile]
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Mr Bump
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Does it really matter about customers and sales?

We both know that that has absolutely no bearing on dB Drag or their competitors.

Its within the 650ci limit and thats it.

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Ben
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www.EastCoastChoons.co.uk
UK SS 1-2 NW Record Holder
Team UK - Team ECC - Team RE - Team DD
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