would the evo2 liithium battery run a rx8?

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RickyG512
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Re: would the evo2 liithium battery run a rx8?

Post by RickyG512 » Fri Dec 11, 2015 12:04 pm

amazon seems to have 70% good and 30% bad reviews, those bad reviews are half cold weather issues and half the battery dieing after few months and ballistics not replacing under their industry leading warranty.

but might sound like a silly idea, but if you really want to keep your battery warm, you could take the battery out each time using their official quick disconnect product and keep it indoors, this would work for me as i only drive my rx8 every few weeks lol, either way, im gonna bite the bullet and buy one =), will keep you guys updated

http://www.racecarbattery.co.uk/bquick- ... b-28-p.asp
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Re: would the evo2 liithium battery run a rx8?

Post by mzivtins » Fri Dec 11, 2015 12:10 pm

It seems like a lot of pain to remove constantly.

It is a shame that Li batteries dont perform well in low temps.

I have a full battery conditioner i use on the motorbike. I also have the equivalent for the car. The are quick release which is good... i wonder if keeping these batteries on a conditioner would help keep the internal temperatures up?

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Re: would the evo2 liithium battery run a rx8?

Post by RickyG512 » Fri Dec 11, 2015 12:13 pm

Not sure but they do have their own official chargers on the same website, check it out

Just a thought when you remove a car battery you have to remove he negative and positive in a certain order, using a quick disconnect won't allow you to disconnect in a certain order, not sure if that would present an issue?
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Re: would the evo2 liithium battery run a rx8?

Post by mzivtins » Fri Dec 11, 2015 1:10 pm

I think it is more precaution than anything, so quick release should be fine.

The thing i would hate, would be things like the clock in the car resetting... the air con and the auto window mode having to be reprogrammed every day, urgh

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Re: would the evo2 liithium battery run a rx8?

Post by RickyG512 » Fri Dec 11, 2015 1:17 pm

we need to hear back from madder from his long term test really,

i know the clock and windows reset, what resets in the AC system i've never noticed anything resetting? you mean like the AC Fan modes or something more complex?

if your going to be using your car daily you probs wont have to take it out, you'll only really need to take it out if you wont use it for 1-2 weeks at a time as the battery would of died by then from things like the alarm, it will last longer if you dont alarm it and just manually lock the doors
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Re: would the evo2 liithium battery run a rx8?

Post by mzivtins » Fri Dec 11, 2015 1:19 pm

There is a reset procedure for the A/C in terms of temperature output, i just assumed the battery removal would reset this too as its controlled via the ECU, but dude... i could be wrong... it's friday, i miss the REX and all i want is some beeeeeerrsss hahaha

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Re: would the evo2 liithium battery run a rx8?

Post by Clive » Sat Dec 12, 2015 10:40 am

Hi Ricky,

Thank you for the call last week, however I did make it clear that this battery was NOT for you and as your main goal was to remove the battery for air flow and not weight saving.

I suggested instead that you either lift the back of the bonnet or invest the battery money in a vented bonnet if you just wanted to keep the engine cool.

As said these battery's will happily run cars such as the ones pictured using the EVO2 below and have become a favourite with custom bikes like the one below due to a lot of power in a small package being able to start high compression engines ,

However as I did say on the phone, they will drain if a car alarm is used and advised not buying one.

We have sold hundreds of these for over three years now, and if you look back through this thread you will see I used this for one winter in the snow on my 3litre 4x4, so yes they will start even a big engine cold.

As said the main reason for using this battery on a car is to save a huge amount of weight primarily on Race cars and bikes that are in use on the vehicles below including our own RX-8 .
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Re: would the evo2 liithium battery run a rx8?

Post by ChrisHolmes » Sat Dec 12, 2015 11:24 am

RickyG512 wrote:Not sure but they do have their own official chargers on the same website, check it out

Just a thought when you remove a car battery you have to remove he negative and positive in a certain order, using a quick disconnect won't allow you to disconnect in a certain order, not sure if that would present an issue?
You are mixing race car and road car setups Ricky. A race car will have a battery isolator switch which dies what it says so you simply pull the quick connector appart with no problem as the is no current being drawn from the battery. On a road car with the ignition off you still have a small current drain which can cause sparking when disconnecting. Not so much of a problem these days with sealed batteries but historically you could have hydrogen gas surrounding the battery an d the spark could ignite that which then ignites the gas in the battery cells and it explodes splattering sulphuric acid everywhere.

Take Clives advice and relocate your battery.
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Re: would the evo2 liithium battery run a rx8?

Post by warpc0il » Sun Mar 04, 2018 11:42 am

The main reason for removing the negative first and refitting it last is the risk of the other end of the spanner touching metal.

The negative terminal of the battery is already connected to the main car body earth, so if your spanner connects between the -ve and the body, then no harm done.

However, if your spanner were to connect between the battery +ve and the body then there would be a huge spark and the battery could explode or catch fire.

Removing the battery -ve first means that it doesn't matter if your spanner touches the body, since there's no circuit.

The simple rule to remember, when removing or refitting, is "Don't touch the +ve if the -ve is connected"

This is also why it's the -ve lead that you have to disconnect if you're doing any electrically sensitive work on the car (e.g. arc welding, starter motor, fuel pumps, airbags, etc) even though you'd think that the +ve is the source of power.

The quick-connector show above doesn't involve a spanner, so there's no risk in just unplugging
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Re: would the evo2 liithium battery run a rx8?

Post by StreetDragster » Sun Mar 04, 2018 6:49 pm

Which is the correct minimum battery for the rx8?

The line up appears to have changed since this thread ex started in 2012

Thanks
Matt

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