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Mechanical Maintenance (Oil, Fluids, Break-In, Servicing) Everything related to the mechanical maintenance of the FR-S and BRZ |
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04-07-2020, 09:52 PM | #71 | |
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04-07-2020, 10:01 PM | #72 |
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Honestly, I went with Braille for the price, and I really didn't think they were different until after the fact, and I read up on AGM. In all, I paid more for the battery and tender than if I had just bought the lighter Shorai. Oh well.
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04-07-2020, 11:46 PM | #73 | |
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Weight: 11.5 lbs CCA: 360 CA: 486 Amp hrs: 15 RC: 25 min Cost: $260 ($170 battery + $90 FT86SF kit) Vs. typical specs for a light 151R battery: Weight: 19-21 lbs CCA: 340 CA: 410 Amp hrs: 40 RC: 55 min Cost: $140 ($110 battery + $30 parts from jp-parts) The Braille has the advantage in cranking amps and weight, but the 151R has more than double the reserve capacity. Since my car typically sits a few days between uses and I'm on e85, capacity was more important to me than cranking amps. Anyway I went ahead and ordered the parts from jp-parts. I'll update this thread if the battery tray is the wrong size for a 151R battery.
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04-10-2020, 03:51 PM | #74 | |
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1) This battery tray is actually sized for a group 51R battery, not 151R. These battery groups are dimensionally similar in width and height, but not length: 151R battery dimensions (L x W x H): 7.4" x 4.9" x 8.9" 51R battery dimensions (L x W x H): 9.4" x 5.1" x 8.8" So the battery tray is actually 2" too long for a 151R battery. That's not a huge issue, but I would recommend really securing down the battery tie-down to ensure the battery won't slide lengthwise in the tray, especially if you do track days, autocross, etc. Otherwise the tray is fine and has the proper detentes at the bottom for mounting to the car. 2) The battery tie-down is 1/4" too wide for the 151R battery, at least with the battery I used. Again, not a huge deal. I fashioned a filler using some lightweight wood I had laying around and it filled the gap just fine. Everything is snug and secure, but it took a few minutes to measure, cut and glue the wood. In the attached pic, it's the black piece (used black duct tape to wrap it) under the top part of the tie-down. You could probably get away without doing this step, but given that I use the car for track days, I wanted to eliminate all play in the tie-down. 3) I ordered a 19 lbs. Magna Power group 151R battery, but instead received a 22.4 lbs. Duracell Ultra 151R battery. My 8 yo stock battery weighed in at 28.0 lbs, so total weight savings was 5.6 lbs. Specs on the battery I received: CCA: 340 RC: 55 min When cranking the car for the first time, it was very easy to tell the increased cranking power over my old battery. My car had been sitting a while and is on e85 so it took 3 cranks, but each crank was nice and strong. It seems a 151R battery is plenty strong for this application, even in 50F weather. Overall I'm pretty satisfied with this battery mod for now. It was about the same cost as an OEM battery, but with some weight savings. Later on when I stop using the car for daily driving, I'll probably switch out to the FT86SF 11.5 lbs. Braillle for more weight savings.
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04-10-2020, 11:59 PM | #75 |
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I had a Shorai in my bike that I abused.. discharged several times leaving my headlight on by accident on my motorcycle. This Shorai battery took this abuse for 6 years before giving up the ghost. Surprisingly sturdy, lasted much longer than expected.
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04-11-2020, 12:06 AM | #76 |
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It’s hard to beat that battery for performance and weight reduction.
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04-11-2020, 12:18 AM | #77 |
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Imagine if I had maintained it properly, keeping it charged and cells balanced. 8-10 years might have gotten out of it.
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06-04-2022, 01:57 PM | #78 | |
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06-10-2022, 03:27 AM | #79 |
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Odyssey PC680 is dead after 3.5 years. I left a data logger plugged into the obd2 port for a few days and I think that’s what ended it combined with not getting a good charge after the jump start, I’ll try to put a tender on it this weekend to see if it revives. For only $120-$140 even at 4 years that’s still better bang for buck then a humongous oe replacement battery at $200+ Note I have fair weather 24-7-365 with only a few hours below freezing here and there.
I have the 3# shorai on order, if that doesn’t last I’m going back to the odyssey pc680. |
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06-10-2022, 03:00 PM | #80 | |
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That’s a bummer. I keep thinking I have a PC680, but I have been running the PC925. It’s 4 years old and it has gone flat twice with the car sitting in storage and it’s still kicking.
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The Following User Says Thank You to NoHaveMSG For This Useful Post: | strat61caster (06-10-2022) |
06-14-2022, 09:35 AM | #81 |
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I got my Shorai LFX36L3-BS12 (4.8 lb) 2 years ago. No probs whatsoever. It is always more eager to start the car than the massive lead-acid battery. I have taken it out for the winter months, but will likely just leave it in next winter as it almost never gets close to 0F in RI.
Shorai: If at 0F/-17C, leave the lights on for 4~5 minutes before cranking. The result will be a better first crank, and longer battery life. |
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battery, daily driver, lightweight battery, track, weight reduction |
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