Big heavy dumb battery

Just keep the battery that you have and go to the gym more often. 😁😁😉

Larry

There's a good discussion of Lithium batteries here:
https://pantera.infopop.cc/top...light-weight-vs-cost

Personally, I use a Delco 'Freedom" battery from an MR-2 turbo, as the smallest, lightest lead-acid unit that has enough power to spin my mini-starter on a smoking-hot 10:1 engine. My experience tells me if the engine doesn't fire after 6-8 turns, I stop and figure out why rather than just grinding away. The battery being in a hole dropped in the front trunk floor, I also was interested in weight, as I'm not much into wrestling heavy parts these days..It weighs 26 lbs.   

Dimensions-  Size 27F=      12-1/2" x 6-13/16" x 8-15/16"                                                                         Size 27H=    14-1/4" x 6-13/16" x 9-1/4"

I'm running 9.5:1 and a regular starter, should that be ok? I like the size and weight.  While I have your attention, do you run the power brake vac line off the carb or the intake? and when I tore this thing apart I don't remember how the throttle return spring was (it was probably wrong from the get go like a bunch of hokey fixes that was uncovered ) Are you a fan of running PCV lines to the air cleaner or just vented valve cover caps? here is some pics.

And do you use the 27H or 27F ??

I'm having trouble finding that battery. What year MR2? The one I found is 56LBS.

As long as your brake booster gets full manifold vacuum, it doesn't matter if you get it from the manifold or the base of the carb.
I'm a big fan of PCV instead of breathers. I run an ME Wagner dual flow PCV and a Moroso air oil separator.

Can't help you on the battery.

A 56 lb battery won't fit in the '92-95 MR-2 turbo's battery well. It's carried INSIDE the high pressure spare tire up in the front trunk.  My battery came from Wal-Mart but Costco also carried it. This type came with dual posts, both conventional vertical posts and the side-mount screw connectors.

As a dropped battery, the side connectors won't work since they will be right up against the sheet metal rack mount under the trunk floor. If your battery has side connectors and you use a dropped battery position, be sure to get the plastic shipping plug for side mount connectors, to guard against something working its way in between the hot side post and the sheet metal. Don't worry about a plug for the ground connection.