How important is CCA to a 'healthy' engine starting?

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Dr. FrankenRex
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How important is CCA to a 'healthy' engine starting?

Post by Dr. FrankenRex »

I did a real short (less than 3 min) vid comparing the Varta N72 and the Yuasa HSB030 batteries on the PZ to demonstrate the importance (or lack of) CCA in relation to starter speed on a normal day. This does not take in to account really low temps which is when CCA really plays a factor, but I can't do that right now as it's not jaffing cold.

In short, a higher CCA does not impact normal starter speed :)

But for those interested in watching anyway:

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Re: How important is CCA to a 'healthy' engine starting?

Post by Milos_Balunovic »

Ref test, did you charge the batteries before you did the test ? :) as voltage drop will impact the RPM. There a higher CCA would drop less than the lower and show higher RPM (not that you need it, but its where you could see it)

What is much more important that people learn that the car is unable to fully charge a battery.
Also a new battery should be charged before it is used. They sit on shelves for unknown time and will discharge by them selves from internal resistance. Same if car is sitting for long (even disconnected battery.
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Re: How important is CCA to a 'healthy' engine starting?

Post by Dr. FrankenRex »

Both batteries had been on a trickle charger before the test, yes. Whilst I don't normally I actually ended up with them sat on the bench charging until a day or so before which was another reason for doing the test :thumleft:
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Re: How important is CCA to a 'healthy' engine starting?

Post by Milos_Balunovic »

Than you have very similar performance batteries :) (notice I didn't write "spec" :) )

I have motorcycle batteries spec'd 220CCA and tested before delivery at 240-260A (yuasa) and also some spec'd 240 but tested 200-220 CCA (charged and "rested" for 24h). Both of the ones you have are premium brands that I would recommend to anyone :) (I have a yuasa for spare and varta silver in the Rexy now). but lesser quality batteries will show the difference very early in their life.
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Re: How important is CCA to a 'healthy' engine starting?

Post by Dr. FrankenRex »

True, but the other main difference is that these tests were done on a warm-ish day and the RX-8 starter isn't horrific in its current pull generally.
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