White_crex

I have a 91 crx with the b18a1 swap and the previous owner put the battery in the trunk with no hold down or anything so my question is how am I supposed to fit the battery under the hood? It just seems like there is not enough room because the intake sits where the battery should go if it had the 1.5l originally. So my question is what is the best way of going about this? thanks

sixstroke

Picture of the bay would help.

Otherwise, why no leave it in the hatch? If you go this route, please get a sealed battery.

F22Who

I would recommend getting one of the marina battery boxes they sell. It comes with straps and I secured it to my interior with a couple self tapping screws. I would get an optima yellow top or something gel filled so your battery isn't leaking gasses inside your car and if something went wrong, battery acid all over you would be a badddd day.

CrxChicken

yeah i have to agree with F22 the problem with CRXs is that the trunk is part of the passenger compartment. having a battery in there is really not optimal and probably not safe.

If you ever got in an accident before you strapped it down you could have 25 pounds of lead flying from the rear of the car into your head.

Where do you find more room? yeah well thats the thing the car wasn't designed for that engine so .. actually i wonder if it was designed for a 1.5 with the size of the stock battery.. its barely larger than a lawn tractor battery. ...

hey theres an idea get a lawn tractor battery.. naaahhhh heh

I mean it just depends how insane you are but I guess you could cut a hole in the firewall .. weld in a box shape that would fit in front of your glove box.. weld it and seal it in real nice and you got a spot for your battery..

Not sure i would want the liability once you make that modification However I wonder if insurance adjusters ever look at engine swap vehicles and say .. we aren't covering the cost of your medical or your passenger's death because you put a larger engine in the car.. and the vehicle was not rated for that horse power or weight or the impact zones changed .. or the load was transferred different because .. you know.

Like to hear about any of those stories.

Charlie Moua

iTrader: (3)

Some of the response are funny. Lol

OP...
For b swap in ef... the easiest ans cheapest route wouls be to use stock ef battery bracket and tie down and then spend money on ebay 2.5" intake which is made for ef or da. It will be pre bent to clear stock battery location and their will be no sacrifice is power or compromise saftey without over stretching your budget.

The second option is to place your ef battery on the lower front passenger side corner.
I use to have this setup. It probably cost about $20 in mild steel at home depo and 30mins of fab.

The third option is to relocate it to the rear trunk. This will cost about $150 to do I right and meet all track safety rules.

KevinEF7

A smaller battery will fit under the hood surely

White_crex

I think im gonna go the route of buying the ef intake and ef hold down tray and try and make it fit under the hood, The car is to small to try and fit one more thing inside along with all the dangers there are with having it in my trunk. Thanks guys I really appreciate all the info and I had a good laugh also.

4drEF

ALL batteries let out some gasses. Standard batteries let out more. You can read about this on the Optima battery website.

The proper way (even if you have a trunk) is to put the battery in a battery box and have a tube to vent the box outside the car.

If you are fancy (I was fancy once) you can mount a battery box in the trunk/hatch area sub-flush to the floor. Use a metal battery box and cut a hole in the floor for it to slide down into. Make sure you clear the gas tank and suspension. A typical metal battery box is aluminum and you floor is steel so you can't weld it. Get fancy and have some 90* stock welded on your box to make a lip. Then make a rubber gasket to go between the lip and floor. Paint it and screw it together. FANCY!

Extra fancy points (I had extra fancy points once) go find a wrecked BMW that has a factory trunk mounted battery. In the engine compartment they have terminals/posts that run back to the battery which allow you to hook up jumper cables without accessing your battery in the trunk. Wire those in and you can access battery power from the front and back of the car. Jump start from either end. FANCY! OH SO FANCY!

If you want ultimate fancy points (I did not get ultimate fancy points >so sad<) find yourself a wrecked BMW and make use of its battery box and battery cable system. Probably cheap from a junk yard.

When you are FANCY your battery will be properly vented outside your car.
When you are FANCY the battery won't have a chance to come flying into your head when you crash into the car in front of you.
When you are FANCY you will gain some corner-weighting help from the battery relocation and you will also have your entire trunk/hatch usable.

BE FANCY! SO SO SO FANCY!

whited

Is there already a good write up on this? The content in this thread is awesome. A lot of good information. If there isn't a write up someone we should collect this all together for future reference.

I can add content one exactly how not to do it. The Yellow CRX I picked up, had a single zip tie as a hold down, and a half cut garbage can as the cover.