BNBZ28

iTrader: (1)

where can i get a cheap box thats nhra approved want to put the battery in the back but dont want to spend 150 bucks on a box.

AlkyIROC

http://www.jegs.com/webapp/wcs/store...69832_-1_10367

greezemonkey

iTrader: (14)

this is the one I bought and used, had everything needed plus some

http://store.summitracing.com/partde...5&autoview=sku

BNBZ28

iTrader: (1)

ok where do most people mount the disconnect switches? pics would be nice.

xpndbl3

iTrader: (5)

in the taillight.

AlkyIROC

Mine is in the same place.

If you want to drive on the street and not have a master switch at the rear, you can install it inside the car as a push/pull switch. Push must turn it off. Drill a hole through the rear for a rod to go through when at the track. Remove the rod when on the street.

bowtiedude

Mine is almost there I have the hole made.

AC

iTrader: (3)

Is it NHRA legal to have the push/pull or any disconnect switch for that matter hidden? I mean if you put in in the bottom of the trunk floor where you'd just have to bend down outside the car to reach it? I just hate the thought of having a cool looking switch in my rear light and parking somewhere and some ahole f's it up...kinda like having your car keyed
Also, I've been looking and can't find a good reference to the ETA rules for NHRA this year. I mean what ET requires a rollcage now? I have a DS safety loop, battery disconnect but I'm NOT going to put a cage in my car. The car has potential to run mid to low 11's I think but obviously dont want to go getting banned from tracks.

AlkyIROC

As per rulebook (buy one), any vehicle with a relocated battery or a vehicle that quicker than 9.99 or 135 MPH must have a master switch.

The master switch must be mounted at the rear and must be easily accessible
Off must be clearly marked
If installed as a push/pull, push is off
Switch can not be made of plastic or keyed
Switch must be installed in the positive battery cable
Switch must kill the engine and all the electrics when turned off

As stated above, you can mount the switch inside the car with a removable rod going to the outside for use on the track. When on the street, remove the rod. Do a search, there are a few pictures on TGO showing such a setup.

heavy_chevy29

i just installed a "push/pull" type cut off switch. i just have to put the "push off" label on. take a look.




if the pics dont work, try my photobucket site:
http://s54.photobucket.com/albums/g1...0off%20switch/

Johnny Blaze

iTrader: (15)

I mounted mine behind the liscense plate.

92rs85berlintta

iTrader: (1)

Got any pics man I wanted to do the same thing.

grthrawn

thought the nhra rule was it had to a have a disconect switch on the outside of the vehicle if the battery was reloacted to the trunk??

AlkyIROC

Needs a master switch if the battery is not in the stock location or if running quicker than the above posted speeds.

I teched a Miata one night. The factory location for the battery is in the trunk. because it hasn't been relocated, no master switch was required.

Dan W

Can also get a 2nd tail light... run the cherry one on the street and the one drilled for the plunger at the track.

loneroad

iTrader: (3)

[quote=Stephen 87 IROC;3622982]
Switch must be installed in the positive battery cable
Switch must kill the engine and all the electrics when turned off

If you switch the batt off , wont the alt keep the car running? I was thinking of running the switch to the neg to shut the car down, glad i read this post first

2fast4u92z

By cutting all power you lose ignition. So car will turn off

AlkyIROC

The alternator will normally keep the car running. You need to wire the field wire differently or buy a master switch with the extra terminals for the alternator power.

That's the hardest part about installing a master switch. Many people don't realize that just disconnecting the battery won't kill the engine.

Now don't forget that disconnecting the battery also kills all the power to your car. ECM loses it's stored block data, radio and clock need to be reprogrammed etc. Not a problem for a race car but relocating the battery in a street car isn't really required.

Johnny Blaze

iTrader: (15)

I'll get a pic for ya.

2fast4u92z

I was told my the track offical or tech guy (whatever they call him). That my BMR mount in the rear cargo area is fine. Cuz it is in it's own area due to the plastic stock panel.

Don't know if this is true. But I have seem dozens of cars. I.E say like a GN that has a battery just bolted to the floor no box. But in the trunk.Also I have seen cars that run 6.xx-1/4 and there is a carbonfiber plate that "covers" the fuel and 2 batterys from the rest of the car. No sealed of area, no box.

As far as the shut off switch I don't know I am to slow!

MrBrooks

Correct me if I'm wrong(please), but as I understand(I dont have a rule book or run any sanctioned tracks)if you use an AGM or gell cell or otherwise non-spillable classed battery(ie. OPTIMA)you are not required to run a sealed vented box as the battery produces no gas and will not spill. I could be wrong here but I have heard that said before.
As for the shut off switch. When placed in the positve cable it will kill the engine no matter what because the alternator goes to the positive side of the circuit,throw the switch and all is lost including the alternator signal.
The batteries in trunks are legal due to the "firewall" properties of the backseat wall, thus isolating the acid/fumes from the passenger compartment.

MrBrooks

No. The whole idea is to be found and thown with ease in the event of a crash

AlkyIROC

All batteries including sealed ones need to be in a sealed case if inside the driver's compartment such as our type of cars. It's a rule that's been argued for a long time and NHRA/IHRA will not change it. The ones that are mounted in the truck such as G-body cars don't fall into that rule because the battery isn't in the driver's compartment.

Just putting the master switch in the positive cable won't kill the engine. The alternator will backfeed the system and supply power to the ignition keeping the engine running. Your battery is used to start the engine then take the excess load provided by the alternator. While running, the alternator is feeding the car's electrical system, not the battery.

The reason for the positive cable is to remove all electrical hot sources when shut off. Disconnecting the ground, it's still possible to create a ground circuit in the event of a crash.

2fast4u92z

Ok I tried to find pics of a camaro with the battery in the back. I can understand a G-body (not realy but whatever). But I have seen many 6.XX cars with a BS piece of aluminum or carbonfiber plate blocking of the rear cargo on a camaro/firebird.

I agree with the battery on off switch but the battery box is a little much as if it is bolted in the rear behind a panel and a sealed battery..... WHF


I realy think that the whole rule book needs to be rewriten. There are bolt on cars running 12.00 and SUV's running 10.XX.

AlkyIROC

If you don't like the battery box rule then build a firewall. I ran a rear firewall for a while when I had the battery and fuel cell mounted in the rear without a battery box.

Buy a damn rulebook before you start bitching about the rules. The "plastic stock panel" does not pass a tech inspection.

2fast4u92z

Had a book when I had the cage built, but lost it when I moved. So that piece of thin metal rubber seal and that pastic fuel cell are called safe?

I know it is per the rule book, however to me that doesn't look safe. On a roadrace car or rally car there would be a cage around the fuel cell and it would be a steel box with the anti-spill vent fittings.

I will be puting my battery in the backseat area in a taylor aluminum box and in my 3rd gen I will use the BMR mount I already have.

Not being a @SS but it doesn't sound right! I agree on safety with fuel but battery not so much.

BNBZ28

iTrader: (1)

i got mine in now. i bought the taylor box mounted it in the rear ttop storage area. and put the switch in the taillight. i guess i wired it correctly because it kills the car when its running. i ran my wire for the ignition on my msd to the switch. cut my subwoofer box so it would fit around it and you cant tell that its there. i will post pics soon.

AlkyIROC

It's called legal. The overflow hose goes through the floor and there are spill holes drilled through the floor.

Road course and rally cars have different rules. Drag cars don't need a stock car cage. The rules state the fuel cell must be inside the body lines.

scooter

iTrader: (11)

Aparantly it does at E-town in NJ

2fast4u92z

Stephen 87 IROC is right! Its legal. And even me the one that loved to push the rules and fight authority. It's just easyer to but $100 box. So I will order one this weekend.

1 DwnCam

Bringing back an old post. Do you have installation pictures of the disconnect switch? Does the switch sit in between the light housing and the sheet metal of the car, or do you have the switch located in the actual car? I'm doing this exact setup and I'm scratching my head right now

xpndbl3

iTrader: (5)

switch sits in the taillight itself, had to drill a hole and use that jam nut to mount it. Then I drilled out a 2" hole into the sheetmetal to run the cables through into the chassis. Took around an hour total to finish it up.

1 DwnCam

Thanks for the info. I appreciate it.

thisme305

iTrader: (1)

If your car is running 11s I think it needs at least a 6 point cage. And as far as the shut off switch, its just the rules. Try having an explosion or smacking the wall and no way to shut off the engine or kill the power all together. Thats the best way to think about it.

joeblue83

iTrader: (8)

If your only running in the 11's isn't the minimum a 5point cage. Correct me if I am wrong but if its any kind of street car the passenger is going to hate you for making them go over the bar!

88 350 tpi formula

iTrader: (9)

so how do slp formulas rate? it was a option and GM aproved to sell the car new off the show room with the battery in the trunk.

19 z28 92

iTrader: (3)

If it came from the factory in the trunk, no disconnect is required.