Speed Density

iTrader: (38)

Just looking into doing the Batt. Relo. And am wondering what is considered NHRA legal.

From what i know its just a simple dry cell battery. But im not sure what or were to pick one up.

How about an Optima 6pack?

And does the battery have to be fully boxed?

Tony.

MADMAN

iTrader: (4)

Any battery is legal. It has to be in a box or mounted outside the passenger compartment.

Speed Density

iTrader: (38)

Cool.

Are there any batteries i should stray from?

Tony.

MADMAN

iTrader: (4)

I prefer the gel cell. Usually I use the yellow top Optimas if I dont go 16 volt.

Speed Density

iTrader: (38)

Do you think the Red Top will be enough?


Tony.

MADMAN

iTrader: (4)

I prefer the Yellow if you are just drag racing. The alternator usually doesnt have enough time to recharge the battery fully during a pass. The Yellow top has more reserve and takes a discharge better.

jshiver

iTrader: (6)

Do you think mounting the battery low in the pass-side wheelwell behind the rear tire and behind the plastic cover would be ok? I am talking about placing the battery where the rear antenna is.

Villain281H

iTrader: (5)

I've used an Optima red top for 3 years and never had a problem with it. It's in my Nova, has been relocated to the trunk and has a 100 amp 1-wire alternator in circuit running an electric water pump, fuel pump and black magic fan among the other electrical draws...

Derek

ApacheDrill

iTrader: (21)

I agree with MadMan.. i have a red top in the trunk enclosed and i am always keeping it on the charger to maintain it.. the car is pretty much strip only, when i drove it more on the street i never noticed any problems..

Magnus

iTrader: (4)

At what point per NHRA rules must you relocate the battery from the front to the back? Is that even the case?

12secSS

iTrader: (30)

You don't need to relocate the battery to the back, it is not an NHRA requirement. It is just a weight level technique. Although you are required to have a kill switch at the back for safety once you exceed either 9.99 or something (can't recall) or the battery is relocated.

Speed Density

iTrader: (38)

Yea, its not a "have" to thing, but since the motor is out, im trying to find stuff to do and i found this.

I think ill just get the Red Top. Its a Street/Strip car, and its a DD.

Tony.

Villain281H

iTrader: (5)

George nailed it. Battery relocation is never required at any et above 7.50 (1/4 mile), but when relocated there needs to be a battery cutoff at the rear of the car. If the car runs 9.99 or 125 mph or quicker, it also must have a battery cutoff in the back, regardless of if the battery is relocated or not.

Derek

12secSS

iTrader: (30)

Woohoo ... what did I win?

Villain281H

iTrader: (5)

Um, one free

Your welcome

Magnus

iTrader: (4)

When they test your car for an NHRA cert, do they just flip the switch or do they actually trace all the wires as well?

I feel a lot safer with the battery in the front outside of the passenger area.. without large welding cables running through the length of my chassis.

Could I just switch all the main relays from the back?

12secSS

iTrader: (30)

Keith, they ask you to rev the car up to 3000 RPMs, then they kill the switch. Reason for this is because some alternators start to charge at above a certain RPM, and by 3000 most (if not all) are charging. If the alt curcuit is not in the kill cuircuit, it will allow the engine to stay running. You need to be able to kill the charging system as well with the kill switch. Yes, you can switch your relays from the back if you need to. Good luck!

Thanks! Yippee, two for the price of one.

Magnus

iTrader: (4)

Awesome, thanks for the info!

Should be pretty easy then, I can put the entire IGN circuit throug the kill switch.

Should save a bunch of weight from cables as well.

Thanks!

kp

iTrader: (34)

I was just going to run the orange wire off the ignition switch to the kill switch and leave the battery up front but I'm stupid.

Honestly moving the battery to the rear is one of the dumber things I have done with this car. I never had a problem with anything with a PC680 up front and now I have a 140a alternator, 60lbs of cable/box and battery added and have to charge the battery between rounds. Also have a 50lb aluminum projectile held in the back with 3/8 all thread and have two huge cables running the length of the car that would pretty much be an instant fire if they shorted out. All that instead of a little 15lb battery in the front that can never get to me lol.

12secSS

iTrader: (30)

I know your pain.