optima batteries

[balljoint]

Looking at running an optima with the CTEK but have a couple questions.

First off, the car is a LM with no alt. Running 50-150 lap mains. Pretty bare electically. Shouldnt be much drain.

I dont want to have battery problems.

My questions are 1) should I run two batteries? Currently set up for it. 2) which one? (I already have a D27M bluetop)
http://www.summitracing.com/parts/ul...-127/overview/

Looking at buying one of these two:
http://www.summitracing.com/parts/ul...-021/overview/
http://www.summitracing.com/parts/ul...-006/overview/

Leaning towards the yellow top because it has a 1 year longer warranty.

Also, would running two bats vs one effect which CTEK charger I select? Two would put me at 260 AH. Would the smaller 7002 work or would I be forced to go with the 2500?

Would that yellow top be enough? Dont want to try the 1 battery with the smaller charger only to find I need to add my other battery and buy another charger.

thankyou

[racinjj]

I ran the red top in my asphalt late model with no alternator and electric fans and long 50 - 100 lap races with no issues. I replaced the battery every three years for piece of mind. Now I switched to yellow top on my dirt cars after reading the Optima website. I have never had any battery related issues, I throw a smart charger on between every race.

[silver6sp7]

I ran a red top with no issues,but was just givin a new Interstate MT7 AGM ,it's their new AGM battery, looks good,well see.....