Trunk mounted battery

[gmorrell]

I have noticed that trunk mounted battery's stay cleaner. They don't have the corroded terminals like engine compartment mounted battery's.

They last longer too, fewer temperature extremes. Heat kills batteries. I know several folks with Miata's (trunk mounted battery from the factory), and some of them are running around on 7 and 8 year old batteries.

 

[Shoaz]

They last longer too, fewer temperature extremes. Heat kills batteries. I know several folks with Miata's (trunk mounted battery from the factory), and some of them are running around on 7 and 8 year old batteries.

I've been driving my Focus around for the last three years with a Harbor Freight battery jumper box in the hatch because I'm sure the original 2003Motorcraft battery is going to give it up any day now. It's still in the engine bay, but whoever had the car before me ditched the factory air box and replaced it with a shorty "ram" air intake. This left the factory cold air inlet just blowing air around randomly on the same side of the engine bay as the battery, and the cone filter inlet happily evacuating whatever air it can find (mostly warm, I'm guessing). I don't know how much that's helped, but this is by far the longest I've ever had a street car battery last in Arizona, that's for certain.

 

[gsilva]

They last longer too, fewer temperature extremes. Heat kills batteries. I know several folks with Miata's (trunk mounted battery from the factory), and some of them are running around on 7 and 8 year old batteries.

I wounder why there is so much less corrosion because I have had one in the trunk for 11 years and no corrosion.

 

[gsilva]

More room under the hood. Belt changes would be easier without that blasted bracket getting in the way...

That to.

 

[gmorrell]

I've seen OEM battery boxes in compact cars with little air scoops that pull in cool air from in front of the radiator to cool the battery, and it's not unusual to see some rigid insulation around the battery these days. My SVT Contour battery box is insulated, and my wife's old Mercury Tracer had a battery box with an air scoop. The trunk's better, it's just an all around nicer environment.

 

[yamahaSHO]

My wife's Mazda 3 is just like that. My STi, doesn't have a box, but I think there is some air directed at it... It has air directed at or away from everything (even the tires).

 

[Sho Amo]

If this isnt all the room you need then you need to sell your sho and buy a carburated v8.






Heres mine. its a complete hack job and needs to be re-done the right way. i shouldnt have even posted it lol.

 

[sho_ted]

non of in trunk pics will pass tech at any track.

 

[Sho Amo]

good thing is at my local track they dont check for test n tune cars.

but i will be re-doing with a sealed case, fuse, and proper wiring.

 

[sho_ted]

and you need an outside cutoff switch that will turn engine off.

 

[firebat45]

and you need an outside cutoff switch that will turn engine off.

I've checked a bunch of rules about this, and you're right. My question is why? You don't need a disconnect if the battery is in the engine bay, I don't get why you'd need one if it's in the trunk. Just as easy to pop one as the other...

Anyway, I can tell you that my car won't have a disconnect. I don't care if it's in the rules, my car is street driven and I don't want my battery turned off by every idiot who walks by and wonders what the big switch is for.

 

[SHOZ123]

You only need the switch at NHRA sanctioned tracks. And then when a Taurus shows up they don't bother th check. At least that has been my experience.

 

[Sho Amo]

i already have the cutoff just havent installed it yet. i was going to use it when i redo the system. i got the moroso switch for like 30 bucks. Ill probably mount it behind the tail light so when i go to the track ill just take off the tail light for inspection and then put it back on before i race.