ok I have a 600 cca with 120 rc type 34 battery in this vehicle. I like to know if I could up size the cca? like 700 or 800 cca? also the rc from 120 to 130 if available. not sure if it make difference. seems that today it went dead and I had cleaned the terminals and jumped started the vehicle. now it starts but seems like its hesitant to turn over a bit before it runs.

 

Yes, upgrade all you like. The important thing is you want to get a battery with ratings no lower than the minimum CCA, RC listed in your owners manual. If you drive short distances or the van sits without running for longer periods the RC rating becomes even more important. http://knowhow.napaonline.com/car-ba...erve-capacity/

 

so having the higher cca and rc rating should not effect the vehicles electrical like alternator and system?

 

Correct. A starter will draw only the current it needs to turn the starter. The rest is a reserve stored in the battery needed for colder days when battery efficiency drops. Same for accessories. They only draw the current needed to operate. What damages electrical systems is low current/voltage. Buy the type 34 battery with the biggest CCA/RC rating available especially if you live in the northern states. The down side is meager. Added cost and weight due to extra plates in the battery. Then there's the situation where the car will crank but won't start. The higher CCA will allow you to crank it longer before killing the battery. That means you have better odds of overheating the starter. A rule of thumb? Don't crank it more than 15 seconds at a time and let it sit 1 minute before cranking again. A scenario you may never experience but keep it in mind if you do.

A simple way to think of it? Put 10 gallons of gas in your van and you drive as fast as you like for 2 hours. Put 20 gallons in and you can do the same for 4 hours. Same amount of power, twice the longevity.