I would like some specific answers on installation.
The Optima 75-35 has the poles (+ and -) reversed and has both standard SAE posts and GM side bolt posts.
The reversed poles will looks ugly once installed and requires longer battery cables.
How long are original M-B cables, positive and negative ?
How long are replacement cables ?
I have thought about screwing in "charging posts" onto the GM side posts (at least for the + pole). Are brass or lead screw ins best ? (These posts allow standard cables to attach).
Should the battery be secured "on it's back" with the top posts pointing out ? Or is any other mounting reasonable (rotate battery 90 degrees with + post out and - post underneath ?)
Any experience and advise would be welcomed.
Best Hopes,
Alan
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1982 240D Manual Transmission - White & Palomino
79,000 miles
I just installed it this evening. Laid it on it's side with the SAE posts facing out (positive towards engine) and GM "side" terminals facing up.
Battery was 1/8" wider than stock Group 49 battery so the clamps were ground down 1/8" inch to fit (no edge to clamp onto though). Also secured with bungee cord (may be updated).
The clamps stop front-back motion and even side to side motion, but limited up-down motion so I added the bungee cord.
Positive test circle (dime size section of lead or ? exposed on same side as SAE terminal) was covered with orange silicone for insulation.
Terminals bolted on easily !
Plan to add secondary ground wire from GM terminal now on top (add charging post) to engine strut.
A bit odd looking, but very functional !
Optima batteries can be mounted in a variety of ways, including on their side.
I like those Optimas. I run them in all my cars although they are smaller but they have plenty of cranking power even when they have been drained considerably.
Linear Mode
