What CCA do I need?

[Cobber]

Looking at buying a battery for the cobra project, only thing is I don't have a lot of room to put a battery.

How much power do I need to start a 1uz? ie what CCA do I need. I am not running any other accesoiers other than normal lights.

 

[Jake Breyck]

I have a 500cca battery in my supra works fine.

 

[spf_lexus]

850cca optima here, but thats powering supercharger, 6k stereo, battery relocation and I live in Colorado. My LS400 stock had a 650CCA battery, if nothing but lights maybe 400-500? Do you need to start it in cold weather?

 

[stevechumo]

I wouldn't go any lower than 500 cca. The 1UZ is a V8 so it takes the starter a good strong current to turn it. I'm running a 1000 cca battery for my stereo and 3 electric fans plus 145 amp alternator anyway. :silly:

 

[spf_lexus]

3 electric fans?? sheesh thats some cooling lol.

 

[Cobber]

Thanks guys, no cold starting problems here in Western Australia. I only have a very small area for the battery so I will see what is available with around 4 - 500 CCA. I still have the big lexus alt to top the battery back up after starting anyway.

cheers

 

[Jake Breyck]

Somthing like this would work well. http://www.braillebattery.com/

there are quite a few other high powered small battery brands as well. just cant think of any others at the moment.

 

[spf_lexus]

Yeah Braille makes some powerful little units if space is prime concern, also I believe they are the lightest batteries for their output.

 

[stevechumo]

3 electric fans?? sheesh thats some cooling lol.

They're all 14" fans. I used to have 2 12" and 2 10" fans..LOL. The turbo system really heats up the engine so a dual 14" fans is good, but when I turn on the A/C, it gets overheated. The 3rd fan is only for the A/C condenser.

There's another place that sells small and powerful batteries here: http://www.jegs.com/p/Powermaster/795651/10002/-1

 

[Muzza_NZ]

Hi Cobber,
We've been using a vertex battery (see link) in the RX7 for the last 6 months, and it has been perfect. I think 4000GT has used two of these in parallel in his supra as well. CCA is about 400A, which is fine on the standard engine. Best of all they're cheap at about $110NZD.
http://lextreme.com/forums/showthread.php?t=9868&highlight=battery

 

[Cobber]

Ahh batteries ain't batteries anymore I think I one of those vertex style batteries should do the trick for me. nice and small too.

The enine starts on the first flick after all it's a 1uz.

 

[3barboost]

for what its worth the std battery in a Mazda MX 5 cranks the 1UZFE just fine

 

[Cobber]

Found a 850 cca dry cell battery about 6" cube. I think it was for a jet ski application 7kg and it spins over the engine real quick.

 

[stevechumo]

Found a 850 cca dry cell battery about 6" cube. I think it was for a jet ski application 7kg and it spins over the engine real quick.

I like dry cell batteries. You can store your car for awhile and it'll still start. I read some articles about the battery, and they say 1 of the reasons the liquid battery loses its charge if being stored is because the acid is accumulated at the bottom. This causes the top portion to have open circuit. The liquid battery needs to be shaken in order for the acid to spread out evenly.