Run time?

[crazy1]

Which would be better for stock stadium truck offroad and why? 400+ runtime 1.165-1.169 voltage or 370-389 runtime 1.175+ voltage Both packs have IR of 2.5 to 2.8 and have been cycled at charge of 5.0, discharge of 30, and cutoff of .90. They are from the same macther. They are all the newest generation GP 3300. From what I have seen and understand for stock the higher voltage pack would be the best. Dose the runtime mean anything to stock offroad or should it just be looked at for MOD? Dose the lower runtime show a problem with the cell? After we started going to the 2400's and no longer had to worry about lasting the whole race I stoped worrying about runtime and have lost track of what it means.

[redheat8]

Ive got the Gp 3300mah cells from SMC @1.174 and there great , ran them today using a PK2 Pro motor, RED

[highroller]

Runtime is not as big a problem with stock and 19turn racing as it is in modified racing - especially oval where we can still dump in a 4min race with the highest runtime/voltage packs available.
Usually it depends on traction or how surface stays together and just how much power you can put down. If track is loomy, loose or tends to breakup as racing goes on then high voltage cells, coupled with a high rpm producing motor may make to much punch to make it beneifical. In some cases a 1.15 to 1.16 voltage may be better and 400 runtime more than enough for stock. Why pay extra for a 420+/1.175+ cell when a 400/1.15 produces the ideal results and is cheaper.
The higher the number the longer it should last. Higher runtime, higher voltage and lower internal resistance are ideal for certain racing while middle level to lower runtime is sufficient. Also be aware of what each matcher is using in the terms of cutoff voltage and runout. The normal runout is 5000, at .90 volts some matchers are using 360 runout others are using .95 or .85 voltage cutoff - all this may do is make voltage seem higher or in the case of voltage cutoff may increase the actual voltage or runtime.

[boborc]

go for highest voltage with a stock motor & 3300 capacity on batteries on an off road course where your not full throttle all the time run time should not be an issue for 5 minute heats.higher voltage more rpm faster

[crazy1]

Thank you for your replies. High roller is right about differnt battery macthers using very differnt settings. I was looking at getting a new pack. The one with the higher voltage/lower runtime was quite a bit cheaper than the lower voltage/longer runtime at the same battery matcher. I was just woundering why runtime cost so much more than voltage. Was thinking am I missing something? :confused: But I guess I am not missing anything. :cool:

To quote Highroller "it depends on traction or how surface stays together and just how much power you can put down. If track is loomy, loose or tends to breakup as racing goes on then high voltage cells, coupled with a high rpm producing motor may make to much punch to make it beneifical." When the track conditions are so that a punch is a bad thing I bring out my old packs and charge them at 4 amp instead of the 6 amp and newer packs that I use when I can get good traction.