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Battery size or group for 740 1986 turbo 700

I just got an Interstate MT-48 at the Interstate distribution center in Vancouver. This size matches what was there. Usually I would get battery at my mechanic but they weren't open on Monday and the car need to be running before Tuesday.

*But* I just noticed the 47 size has higher CA and CCA. Then there's the 91 size which is physically the same size but also higher CA and CCA.

I can't find any specs on the internet for the minimum or official battery size for the 740. The 700s are new to me, my previous volvo was 240.

Seems like I should exchange what I got with one of the above. The 47 would have more room around sides for removing posts. 91 size has more juice overall and is only $10 more than size 48.

Kinda mundane subject, but I'd like some opinions. Thanks! DaN








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Battery size or group for 740 1986 turbo 700

If it's cold where you live shoehorn the biggest the battery pan will allow. Worked w/ zero issues for my bricks.

ian








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Battery size or group for 740 1986 turbo 700

I am running the Wal-Mart battery that used to be in my long gone Acura Integra. Car's happy.








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Battery size or group for 740 1986 turbo 700

According to the manual for my car, a 1991 turbo 740 (battery on the driver's side), the ratings are "520A/100 min." I guess that means 520 amps CCA, and 100 min reserve capacity. The manual does not give group size. Note, though, that the 1991 and 1992 740s were nearly 900 series cars in many ways, including computers and electronics/electrical system. The battery might be different. Yours is a "pure" 700 series car. Bottom line, though, is if it physically fits, or can be made to, and provides enough starting power and reserve capacity, it will work.

For what it may be worth, my battery is an Optima, group 75/25, which does not even come close to a perfect physical fit. But, with the application of a little of our legendary Brickdriver ingenuity, the hold downs can be made to work. My battery's ratings are 720CCA and 90 min reserve capacity.

If it is an option for you, I heartily recommend the Optima batteries. Mine is 9 years old, and may, finally, be showing signs of beginning to go down hill. Note that I said "may" be showing signs aging. Here, in Florida, batteries usually last about 3 years. Mine still holds 12.5 to 12.6V (should be 12.8 or more) and starts the car just fine. The alternator failed last week, and the battery still had enough strength to operate the car for, possibly a few days (there were subtle signs of alternator failure a day or so before it became obvious), and then, after the car died and was towed home, giving the nine-year-old battery time to rest, it started the car and ran it long enough for me to turn the car around in the driveway. Also, note that any AGM battery, like an Optima, won't cause corrosion on the terminals, because there is no leakage of electrolyte. They are fully sealed.
--
Scott Cook - 1991 745T, 1986 Toyota Tercel (Don't laugh, it is reliable, faithful AND gets 41 mpg!)








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Battery size or group for 740 1986 turbo 700

Thanks for responses! I dug out my manual which says 450 A, 90 min.

According to the Interstate chart (http://www.interstatebatteries.com/cs_eStore/content/product_info/auto_megatron2_f.asp)
the MT-48 fits this requirement with a CCA 550 / RC 96.

The MT-47 is five minutes shy of a 90 minute reserve, I suppose it would work fine too. It costs $10 less, so is probably a better deal.

The MT-91 is 120 min. reserve and 85 month rated and is only $8 more than MT-48.

So it seems they all work find and of the three Interstate Megatron models the 48 seems the most expensive.

Optima? Seems good to me but I can barely justify the Megatron cost!








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Battery size or group for 740 1986 turbo 700

For a good fit with Otima batteries, one has to get one of the models with the reversed terminal configuration. The 35 or 34R models have this. They don't list volvo on the website, but if you call the number they will recommend the 35 battery. I got one and it is a perfect fit.

Many places only carry one redtop style, but one can order the 35 online.
--
Paul NW Indiana '89 744 Turbo 145K/ '90 745 turbo 127K







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