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-   -   ROAR Approved Chargers (https://www.rctech.net/forum/electric-road/435618-roar-approved-chargers.html)

HarryLeach 09-17-2010 10:09 PM

Definitely need to make sure the meter is reading correctly.

If everyone's battery is reading high, it should raise a red flag ;)

Bubblehead 09-18-2010 04:19 AM


Originally Posted by Ron Goetter (Post 7953763)
You can turn off competition mode to lower finish charge voltage back to 8.40.

I would defiantly check your battery voltage with another multimeter to. I've seen multimeter be off by more then .10 before.

Is competition mode (plus charge)? That's the only mode on my charger that has a on/off function.

miller tyme 09-18-2010 05:41 AM


Originally Posted by Bubblehead (Post 7954529)
Is competition mode (plus charge)? That's the only mode on my charger that has a on/off function.

Yes, comp mode is 100 percent +, meant to reach the extra .04 when allowed

Jeremy Otis 09-18-2010 07:52 AM


Originally Posted by CarbonJoe (Post 7953616)
Turn on your car and yank the throttle until you meet the rules. However, at some ROAR races, they may DQ you if you are over voltage when you come to the tech table. What I suggest is to have your own volt meter, and "calibrate" it to what the official meter reads. For example, if the official meter reads your pack at 8.42 volts, but your meter reads 8.40 volts, you better make sure before you go to tech your meter reads 8.38 volts (0.02v "offset" from the official meter).

At this years Carpet Nats I was DQ'd for battery voltage. My own fault because I didn't check before my first qualifier... If you are using a voltmeter I would suggest using the meter that tech is using. As long as you check BEFORE you go through your formal tech inspection and your voltage is to high you can do what you need to get it down with as many checks that you need. In my experience free revving your motor does very little to drop voltage not to mention the possibilty of blowing a rotor up.

slashman4x4 09-18-2010 08:45 AM

Dont give ROAR any ideas, I can see a Novak Roar Approved charger in the works..:(

EddieO 09-18-2010 10:24 AM


Originally Posted by slashman4x4 (Post 7954991)
Dont give ROAR any ideas, I can see a Novak Roar Approved charger in the works..:(

That right there is the funniest thing I have read in a while...

Later EddieO

odpurple 09-18-2010 12:30 PM


Originally Posted by EddieO (Post 7955205)
That right there is the funniest thing I have read in a while...

Later EddieO

Ya, I can see it now, "DQ'd and sent home for using a non-ROAR charger" :lol:

Bubblehead 09-18-2010 06:24 PM

Well I turned the Plus Charge mode off and my batteries came off the charger at 8.4V. I don't understand why they must be at 8.4V and no higher, 8.41V DQ'd.

odpurple 09-18-2010 07:04 PM


Originally Posted by Bubblehead (Post 7956428)
Well I turned the Plus Charge mode off and my batteries came off the charger at 8.4V. I don't understand why they must be at 8.4V and no higher, 8.41V DQ'd.

If you overcharge lipo batteries too much they can catch on fire and burn down your whole village. The rule is for safety. ROAR's rule is 4.20/8.40v, most others still use 4.22/8.44v. Most agree that either of those limits are well within safety concerns. Is a disqualification neccessary for .1v? Most people think not :cool:

slashman4x4 09-18-2010 07:14 PM


Originally Posted by odpurple (Post 7956529)
If you overcharge lipo batteries too much they can catch on fire and burn down your whole village. The rule is for safety. ROAR's rule is 4.20/8.40v, most others still use 4.22/8.44v. Most agree that either of those limits are well within safety concerns. Is a disqualification neccessary for .1v? Most people think not :cool:

Only in ROARs eyes..

nashrcracer 09-18-2010 07:27 PM

most GFX35 charge to 8.44 and 4.22 so if you run with that charger you got to watch out. I have a LRP pulsar 3 and you can adjust that. I saw sean cochran changing his at the IIC in 2009 so he was setting so that when he went to tech that he had it on the button. I know some of the cheaper ones don't have the greatest voltage control. I have seen them be all over the range. if your serious about running roar races then you probably need to get one that allows adjustment just incase you show up to a roar race that has a volt meter that's off. would be nice if roar did post a list of chargers that are SUGGESTED for roar racing. might be a selling point for a charger company.

Still Bill 09-18-2010 08:16 PM

Having been a past "victim" of the overcharging craze with NIMH packs, I say that ROAR had very good reason for taking a safe stance with lipos when they made their original call on maximum allowable voltages for events.

Besides OD (and at the really big events), I rarely see anyone charging their packs in an approved lipo sack. All the more reason for ROAR to be more so on the safe side.

And Bubblehead only having fifty-some posts on RCTech also gives me reason for additional concern. He may well be a newbie and likely should not be pushing lipo charging limits with such limited experience. BH should otherwise be working on his driving skills to obtain optimum results.

Bill

stiltskin 09-18-2010 08:31 PM


Originally Posted by Still Bill (Post 7956753)

And Bubblehead only having fifty-some posts on RCTech also gives me reason for additional concern. He may well be a newbie and likely should not be pushing lipo charging limits with such limited experience. BH should otherwise be working on his driving skills to obtain optimum results.

Bill

Ron's been around for awhile, just never got into the internet crap. :cool: He is new to lipo and trying to figure everything out. Since we don't normally tech for battery voltage (or anything else for that matter :rolleyes:) he had questions about voltage and charger abilities/defects.

Bubblehead 09-18-2010 08:43 PM


Originally Posted by Still Bill (Post 7956753)
Having been a past "victim" of the overcharging craze with NIMH packs, I say that ROAR had very good reason for taking a safe stance with lipos when they made their original call on maximum allowable voltages for events.

Besides OD (and at the really big events), I rarely see anyone charging their packs in an approved lipo sack. All the more reason for ROAR to be more so on the safe side.

And Bubblehead only having fifty-some posts on RCTech also gives me reason for additional concern. He may well be a newbie and likely should not be pushing lipo charging limits with such limited experience. BH should otherwise be working on his driving skills to obtain optimum results.

Bill

More of reader, NOT trying to over charge. That's why I ask the question maybe you should read it.

Still Bill 09-18-2010 08:45 PM

Looks like you just nominated yourself to be BH's lipo coach...LOL

And I do like your reference to OD in your signature. ;)


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