Upgrade/Replace 51R group battery size to group 35 or 24F with hardware - Page 10 - Drive Accord Honda Forums | radio-pro.ru
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post #136 of 274 Old 04-04-2015, 02:56 PM
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Originally Posted by AV8OR View Post
I posted in this thread last summer, and said my brand new sport started "weak". Very slow turn over but started. Well now, mid winter, after the third time of it turning over so slow and weak that the dash lights would flash off and on each slow painful turn............... a new 35 battery it is.

Whether the battery is too small or there are "bad" Honda 51R batteries out there, doesn't matter. I want a battery I can trust.
Don't blame you. I did the same thing wit my 7th gen. Ironically the darn Everstart-Max battery (wal-mart) keeps going bad. I get a free one every two years, but the original lasted over 4 years.

The problem is all the high CCA batteries have much thinner densely packed lead plates and they are much more likely to short circuit and go bad. I think I will purposely buy a lower CCA battery next time so it will last longer. I think a standard 35 would have more CCA than the OE 51R anyway. Just overkill going to 800 CCA on a car that only needs a few hundred to start. FWIW my Miata battery is a fancy gel type and only has 300 CCA. Actually starts that 1.8 liter (yes smaller than a 2.4) very quickly.


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post #137 of 274 Old 04-04-2015, 05:15 PM
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I'm not battery shopping, but I noticed in Walmart today that the 24F Everstart batteries dated March 2015 were 600 CCA. Must be a seasonal thing bc I recall Karfeek buying a higher rated CCA unit during winter.


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post #138 of 274 Old 04-04-2015, 05:50 PM
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I'm not battery shopping, but I noticed in Walmart today that the 24F Everstart batteries dated March 2015 were 600 CCA. Must be a seasonal thing bc I recall Karfeek buying a higher rated CCA unit during winter.
The Everstart MAXX is 750. The Everstart with the 2-year warranty is 600CCA.

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post #139 of 274 Old 04-05-2015, 11:53 AM
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Walmart's EverStart Maxx-35N (North) is the top rated battery in the 35 group, according to the famous rating magazine that shall remain nameless. It has CCA of 640 with retail price of $90. 3-year replacement warranty.

Bosch 35-640B is second, also with CCA of 640, but retails for $35 more. 3-year replacement, 8-year pro-rated warranty.

Third is EverStart Maxx-35S (South), same price as 35N, but with CCA of 550. 3-year replacement warranty.

Make sure you're getting the 35N when buying at Walmart. So you Southerners, head up North to buy your battery.

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post #140 of 274 Old 11-25-2015, 07:07 PM
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Bump for the cold weather.

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post #141 of 274 Old 12-21-2015, 06:42 PM
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I appreciate the part numbers for the 24F conversion. I have a 15 2.4 Accord, CA car, and not happy with the starter sound after sitting a few days in cold weather. I have posted elsewhere that I believe the charging algorithm is optimized for fuel economy not battery life. I also think the 51R is either too small or of not sufficient quality to power this car. Very possibly due to relatively large electrical loads, not covered by alternator at times, from the power steering etc. Leading to constant discharge/recharge cycles when the car is in operation. From my observations, cars used for steady state high speed cruise should be easier on the batteries than those used for urban use with frequent power steering usage, low speeds, and the alternator charging algorithm. It appears the power steering can draw up to 60 or 70 amps. Couple that with lights, HVAC blower, window defroster, engine systems, etc. and the consumption could be well over 100 amps-which I've observed is not covered by the alternator completely at low engine speeds.

Anyway I'll be doing the conversion soon.. Having more battery amp hour capacity (and CCA) will certainly help with the voltage sags under heavy loads-starter, power steering, etc.
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post #142 of 274 Old 12-22-2015, 10:47 AM
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Originally Posted by tpi View Post
I appreciate the part numbers for the 24F conversion. I have a 15 2.4 Accord, CA car, and not happy with the starter sound after sitting a few days in cold weather. I have posted elsewhere that I believe the charging algorithm is optimized for fuel economy not battery life. I also think the 51R is either too small or of not sufficient quality to power this car. Very possibly due to relatively large electrical loads, not covered by alternator at times, from the power steering etc. Leading to constant discharge/recharge cycles when the car is in operation. From my observations, cars used for steady state high speed cruise should be easier on the batteries than those used for urban use with frequent power steering usage, low speeds, and the alternator charging algorithm. It appears the power steering can draw up to 60 or 70 amps. Couple that with lights, HVAC blower, window defroster, engine systems, etc. and the consumption could be well over 100 amps-which I've observed is not covered by the alternator completely at low engine speeds.

Anyway I'll be doing the conversion soon.. Having more battery amp hour capacity (and CCA) will certainly help with the voltage sags under heavy loads-starter, power steering, etc.
I'm at 3.25 years in Ohio and notice some mild slow crank on occasion. It stays in the garage overnight so usually not noticed. I bought the V6 hold down plate and plan to go with the 35N as I don't want to spend $40 extra for hardware on the 24.

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post #143 of 274 Old 12-22-2015, 04:01 PM
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Originally Posted by II Kings 9:20 View Post
I'm at 3.25 years in Ohio and notice some mild slow crank on occasion. It stays in the garage overnight so usually not noticed. I bought the V6 hold down plate and plan to go with the 35N as I don't want to spend $40 extra for hardware on the 24.
How does 24 vs 35 matter wrt hardware? Group 35 dimensions = Group 24's but an inch shorter.

Not a poke, an honest question. Replaced the 24 with a 35 in my V6 'cause I use Odyssey batteries and they don't offer a 24. They cover 24 with 35 and a spacer. Doing that, the 35 fit perfectly. Don't understand why it would be any different in a 51 to 24/35 upgrade in a an Accord.

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post #144 of 274 Old 12-22-2015, 04:19 PM
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I've been getting mild cranks on my i4 sport this past month in Los Angeles. We've been hitting a warmth (heh) of 30-40 degrees every night. Well this morning, car finally didnt want to turn over. It cranked but didn't start on the first one. Second one fired up after the mild crank. Now I'm seriously debating on switching to a V6 battery instead. Kind of sucks that a 6 month old car didn't want to turn over in the cold. Embarrassing actually.....

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post #145 of 274 Old 12-23-2015, 04:58 AM
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How does 24 vs 35 matter wrt hardware? Group 35 dimensions = Group 24's but an inch shorter.

Not a poke, an honest question. Replaced the 24 with a 35 in my V6 'cause I use Odyssey batteries and they don't offer a 24. They cover 24 with 35 and a spacer. Doing that, the 35 fit perfectly. Don't understand why it would be any different in a 51 to 24/35 upgrade in a an Accord.
I'm just going by what I read on the forum from people presumably with experience as I have none. The following is copied from post 11 in this thread, I have seen similar info elsewhere.

Battery Group Sizes

51R
Length Width Height
9 3/8 (5 1/16) 8 13/16

35
Length Width Height
9 1/16 (6 7/8) 8 7/8

24F
Length Width Height
10 3/4 (6 13/16) 9


You can order the following part numbers and put a Group 24F battery in a 4 CYL

Hold down plate 31512-T2G-A00 $4.62
Bolt (203mm) 31513-SDB-000 $2.52
Bolt (235mm) 31513-T2A-A00 $3.45
Battery Box 31521-T2G-A00 $19.26
Battery Cover 31531-T2G-A00 $9.54

Or if you want to put a group 35 in a 4 Cyl just get the hold down plate from the V6 (Hold down plate 31512-T2G-A00 $4.62) and discard the existing Plastic box as the group 35 is about the same height as the 51R and the same width as the 24F. Obviously the Group 24F and 35 batteries weigh more than the 51R they replace, but some people need or want the extra storage capacity.

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post #146 of 274 Old 12-23-2015, 05:01 AM
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Originally Posted by highercal View Post
I've been getting mild cranks on my i4 sport this past month in Los Angeles. We've been hitting a warmth (heh) of 30-40 degrees every night. Well this morning, car finally didnt want to turn over. It cranked but didn't start on the first one. Second one fired up after the mild crank. Now I'm seriously debating on switching to a V6 battery instead. Kind of sucks that a 6 month old car didn't want to turn over in the cold. Embarrassing actually.....
That's odd, I'm in my 4th Ohio winter and just now starting to get some slow crank. I could probably get by but this is my snow mobile so I'm getting the battery this weekend. Temps in the '60s.

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post #147 of 274 Old 12-23-2015, 09:54 AM
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Quote:
Originally Posted by II Kings 9:20 View Post
I'm just going by what I read on the forum from people presumably with experience as I have none. The following is copied from post 11 in this thread, I have seen similar info elsewhere.

Battery Group Sizes

51R
Length Width Height
9 3/8 (5 1/16) 8 13/16

35
Length Width Height
9 1/16 (6 7/8) 8 7/8

24F
Length Width Height
10 3/4 (6 13/16) 9


You can order the following part numbers and put a Group 24F battery in a 4 CYL

Hold down plate 31512-T2G-A00 $4.62
Bolt (203mm) 31513-SDB-000 $2.52
Bolt (235mm) 31513-T2A-A00 $3.45
Battery Box 31521-T2G-A00 $19.26
Battery Cover 31531-T2G-A00 $9.54

Or if you want to put a group 35 in a 4 Cyl just get the hold down plate from the V6 (Hold down plate 31512-T2G-A00 $4.62) and discard the existing Plastic box as the group 35 is about the same height as the 51R and the same width as the 24F. Obviously the Group 24F and 35 batteries weigh more than the 51R they replace, but some people need or want the extra storage capacity.
If you go further in that thread it was assumed that the V6 came with the Group 35 like the 8th gen. But, in reality the V6 9th gen comes with the larger and more powerful 24F. If you bought the bracket listed above it is the 24F bracket. Maybe it will work for the Group 35, but why pay the same price to upgrade to a weaker Group 35 battery when you can get the 24F?

I went 24F and it was firing over beautifully in -14F last winter.

My .02

Jay

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post #148 of 274 Old 12-23-2015, 02:45 PM
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If you go further in that thread it was assumed that the V6 came with the Group 35 like the 8th gen. But, in reality the V6 9th gen comes with the larger and more powerful 24F. If you bought the bracket listed above it is the 24F bracket. Maybe it will work for the Group 35, but why pay the same price to upgrade to a weaker Group 35 battery when you can get the 24F?

I went 24F and it was firing over beautifully in -14F last winter.

My .02

Jay
Thanks a million Jay, I haven't bought the battery yet. Not going with a box and other bolts if the hold down plate will suffice. I can live without a plastic box and all it's hardware.
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post #149 of 274 Old 12-23-2015, 03:03 PM
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Originally Posted by II Kings 9:20 View Post
I'm just going by what I read on the forum from people presumably with experience as I have none. The following is copied from post 11 in this thread, I have seen similar info elsewhere.............

[/B]
Sorry, you're right. My replacement battery group size is 34R....same dimensions as a 24F less an inch in height. Brain fart...my bad.

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post #150 of 274 Old 12-23-2015, 05:12 PM
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Thanks a million Jay, I haven't bought the battery yet. Not going with a box and other bolts if the hold down plate will suffice. I can live without a plastic box and all it's hardware.
You will be ok with just the plate. To think my first car had a bungy cord holding the battery in place...

Jay


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