Littlebeefy Posted November 3, 2021 Share Posted November 3, 2021 Is anyone using a size 34 or 78 battery in their Bullnose with only the standard inner fender battery support? Wondering if it fits and how well. Thanks Link to comment Share on other sites More sharing options...
Gary Lewis Posted November 3, 2021 Share Posted November 3, 2021 Corey says he was running a Group 34 in his truck, as explained here. And here he explains that it is a 34/78. Are they the same? Link to comment Share on other sites More sharing options...
Littlebeefy Posted November 3, 2021 Author Share Posted November 3, 2021 Corey says he was running a Group 34 in his truck, as explained here. And here he explains that it is a 34/78. Are they the same? Thanks Gary. That link was what I needed to know. FWIW: Group 34 and Group 78 are essentially the same dimensions. The only difference is that 34 has standard posts on the top and 78 has screw in posts on the side. There is also group 3478 (or 34/78 or 78DT) which is basically the combination of the two, so it has posts on top and terminals on the side, but is the same size as a 34 and a 78. Also, there is a group 34R, which is a 34 with the terminals reversed (I think that was the problem Cory discovered). There also seems to be a lot of variation in the location of the posts and terminals depending on which brand you buy. bAsed on Cory's experience, the fit is great. It seems like a group 24F is what gets pushed most often as an upgrade from the 56 or 65. From what I can tell, the 34, 78 and 34/78 are smaller, lighter and have a higher CCA. Plus the 34/78 is "expandable" for accessory power so if it fits that's what I'm buying. Link to comment Share on other sites More sharing options...
Gary Lewis Posted November 3, 2021 Share Posted November 3, 2021 Thanks Gary. That link was what I needed to know. FWIW: Group 34 and Group 78 are essentially the same dimensions. The only difference is that 34 has standard posts on the top and 78 has screw in posts on the side. There is also group 3478 (or 34/78 or 78DT) which is basically the combination of the two, so it has posts on top and terminals on the side, but is the same size as a 34 and a 78. Also, there is a group 34R, which is a 34 with the terminals reversed (I think that was the problem Cory discovered). There also seems to be a lot of variation in the location of the posts and terminals depending on which brand you buy. bAsed on Cory's experience, the fit is great. It seems like a group 24F is what gets pushed most often as an upgrade from the 56 or 65. From what I can tell, the 34, 78 and 34/78 are smaller, lighter and have a higher CCA. Plus the 34/78 is "expandable" for accessory power so if it fits that's what I'm buying. Glad it helped. Please let us know how it fits. And glad to have that explanation to refer to later. Link to comment Share on other sites More sharing options...
Gsmblue Posted December 10, 2021 Share Posted December 10, 2021 Glad it helped. Please let us know how it fits. And glad to have that explanation to refer to later. I just had to replace the battery in Eunice. A Group 24 fit real nice. I should get a pic of it in the truck shouldn’t I.. Fyi: the group 56 AZ suggested didnt fit, was too short and terminals on the wrong side.. Link to comment Share on other sites More sharing options...
Machspeed Posted December 10, 2021 Share Posted December 10, 2021 Just put this in last weekend. Just slightly bigger than the OEM size battery but fit perfectly. Link to comment Share on other sites More sharing options...
kramttocs Posted December 11, 2021 Share Posted December 11, 2021 I am running two Group 34 odysseys. One 34 and one 34R to keep the ground post near the fender. Fit great although I did 3D print some spacers so the factory hold downs would be snug. That may just be needed due to how Odyssey formed their tops though. Link to comment Share on other sites More sharing options...
Gary Lewis Posted December 11, 2021 Share Posted December 11, 2021 I am running two Group 34 odysseys. One 34 and one 34R to keep the ground post near the fender. Fit great although I did 3D print some spacers so the factory hold downs would be snug. That may just be needed due to how Odyssey formed their tops though. Yes, the Odyssey tops are strange. Had you done the spacers before I machined the hold-downs... Link to comment Share on other sites More sharing options...
Machspeed Posted December 11, 2021 Share Posted December 11, 2021 Yes, the Odyssey tops are strange. Had you done the spacers before I machined the hold-downs... BTW, my recent battery purchase at our local AZ was $60 off! This is their top of the line battery. I'm well known in this store and they call me by my name when I enter. Obviously, I go there a lot. And, the store manager wants my truck! He had a couple Bullnose's in his youth. Off topic but want to share. On the same day that I purchased this battery, took my truck by Gatorhyde, the outfit that sprayed in the bedliner on my truck more than ten years ago. Wanted to get it looking new with a few small changes. After explaining to the owner what I wanted, I asked him what the cost might be. His response, "nothing". My response, "What!" Much dialogue transpired after that, but he insisted that it was under warranty and thus would cost me nothing. I'll be purchasing a window decal! I shared this with the colleague that I work with and he said I must be living right. Maybe so, but there are huge benefits in living in a small town. Sorry, this is a battery thread that I jacked.... Link to comment Share on other sites More sharing options...
Gary Lewis Posted December 11, 2021 Share Posted December 11, 2021 BTW, my recent battery purchase at our local AZ was $60 off! This is their top of the line battery. I'm well known in this store and they call me by my name when I enter. Obviously, I go there a lot. And, the store manager wants my truck! He had a couple Bullnose's in his youth. Off topic but want to share. On the same day that I purchased this battery, took my truck by Gatorhyde, the outfit that sprayed in the bedliner on my truck more than ten years ago. Wanted to get it looking new with a few small changes. After explaining to the owner what I wanted, I asked him what the cost might be. His response, "nothing". My response, "What!" Much dialogue transpired after that, but he insisted that it was under warranty and thus would cost me nothing. I'll be purchasing a window decal! I shared this with the colleague that I work with and he said I must be living right. Maybe so, but there are huge benefits in living in a small town. Sorry, this is a battery thread that I jacked.... We don't have an Autozone in our little town, but do have an O'Reilly's. I initially started dealing with them, but their personnel don't stay for more than a few months. Ron, the manager when I started, is now the assistant manager at Bumper To Bumper and couldn't be happier. So I give him some business, but most of it has gone to Skiatook Auto Parts, which is locally-run and has two employees - David, the owner, and DeWayne, who is also member 93F3507.3 here on the forum. But none of those places carry the Odyssey batteries, and since that's what was in Big Blue for a starting battery when I got him I wanted to get another for the aux battery. Turns out 4 Wheel Parts in Tulsa is a dealer, so I bought from them. The starting battery is an Odyssey Extreme 31M PC2150, and the aux battery is an Odyssey Extreme 34-PC1500. So a Group 31 fits in the starting slot, but it won't clear in the aux slot as it is too tall so I went with the Group 34. Link to comment Share on other sites More sharing options...
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