Li vs AGM Batteries
#1
Rotodeus
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Li vs AGM Batteries
I'm on the market for a new battery for my FD. This will be for a track day car that occasionally is driven on the street and I will be running E85 (it's a build in progress: I'm not sure if it's going to add a lot of start issues). I see a lot of the AGM batteries on here but only a few Li. Has anyone tried running a battery like the Shorai LFX18? The cold cranking amps are better than the Oddessy PC680 and they are so light it seems like you could get most of the benefits of the battery relocation without moving it. Has anyone else gone this route? Are there other considerations I'm missing?
#2
BRAAAAAP pssh BRAAAAAP
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I am very impressed by lithium batteries, I have not upgraded one on either of my rx7's but I did on my motorcycle and it is amazing, super small and light and cranks the motor like a madman compared to regular batteries
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Rotodeus
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I am willing to give up some performance (750 CCA is great but evidently people are getting by with ~200CCA batteries) but don't want to find that the total amp hours is critical or that they don't handle the current from a car alternator well and destroy themselves or that it has the capacity for 3 good cranks before it is toast.
If no one has done it, I may very well be back on here in the near future saying why you shouldn't...
#5
Mazzei Formula
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I have a shorai lithium, I cannot remember the amount of amps, Ill look at it and report later.
You will NOT be disappointed. Super small, super lightweight, and cranks the car amazingly.
The downside is that you only get a few seconds of high speed cranking so hopefully your car starts up during that period. Otherwise you must wait a few seconds between cranks.
Lithium is by far the best. I've used the small AGM dry cells, large batteries, etc.
Pic attached showing the size of this Shorai. Thing is so lightweight its unbelievable.
I've let this battery sit for about 8 weeks now during my motor swap without charging. Lets see how well it jumps back on the charger
You will NOT be disappointed. Super small, super lightweight, and cranks the car amazingly.
The downside is that you only get a few seconds of high speed cranking so hopefully your car starts up during that period. Otherwise you must wait a few seconds between cranks.
Lithium is by far the best. I've used the small AGM dry cells, large batteries, etc.
Pic attached showing the size of this Shorai. Thing is so lightweight its unbelievable.
I've let this battery sit for about 8 weeks now during my motor swap without charging. Lets see how well it jumps back on the charger
#6
Rotary Motoring
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I have the largest Shorai (4lbs) and love it.
If its in a toy car that doesn't get driven every day get the charger and keep it on storage mode.
I too have tried other dry cells and Optima batteries and the Shoria is my favorite so far.
However, it does have a fairly small capacity so you can't leave your radiator fan on and engine off after a really hot track session and walk away expecting the fan to run until the engine is cool and have enough left to start the car.
Best if you have a turbo timer to cool everything down to where the fan would shut off instead. Well, I do, but didn't think to use it.
If its in a toy car that doesn't get driven every day get the charger and keep it on storage mode.
I too have tried other dry cells and Optima batteries and the Shoria is my favorite so far.
However, it does have a fairly small capacity so you can't leave your radiator fan on and engine off after a really hot track session and walk away expecting the fan to run until the engine is cool and have enough left to start the car.
Best if you have a turbo timer to cool everything down to where the fan would shut off instead. Well, I do, but didn't think to use it.
#7
Rotodeus
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This is what I was looking to hear, thank you both.
Blue TII, did you do a battery relocation on yours as well? Given the weight/size, I am not sure if there is even much benefit. I'm not sure if under hood temps are going to make a big issue.
Blue TII, did you do a battery relocation on yours as well? Given the weight/size, I am not sure if there is even much benefit. I'm not sure if under hood temps are going to make a big issue.
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