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Old 02-23-2005, 03:41 PM   #1
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hi, i'm a fairley new to this website , but very experienced in the hobby. i raced, played, built , rebuilt many chassis for over 20 years, i notice many people give good advice like the "pro" drivers, but they are limited since they can only give advice surrounding their product they are representing. i'm not biased towards any product since these big companies do not pay me to give comments. i'm not selling you anything, just giving some good advice that doesnt influence in buying a particular product. so you can ask me anything that you are curious about, any chassis out in the market. i say it how it is. thats all
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Old 02-23-2005, 03:45 PM   #2
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Welcome to this forum and thanks for coming along! Finally a person who can give out honest opinions with out having a company dictating what he can say. So thank you!
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Old 02-23-2005, 03:47 PM   #3
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thanks newbee
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Old 02-23-2005, 03:50 PM   #4
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Default TRACK EQUIPMENT

I haven't really raced on any tracks as of yet. I've been advised by someone on this forum to do so instead of just racing in the streets. What you do recommend that I bring to the track inorder for me to win?
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Old 02-23-2005, 04:04 PM   #5
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Default Re: TRACK EQUIPMENT

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Originally posted by newbee_racer
I haven't really raced on any tracks as of yet. I've been advised by someone on this forum to do so instead of just racing in the streets. What you do recommend that I bring to the track inorder for me to win?
the first thing you should worry about before winning, is having fun, thats the whole idea of this hobby. the first thing you have to do, is take a pen and note pad, and study the track environment, ask the local racers and find the fast guys running, ask them as many questions about what you need to run at that particular track. every track is different , learn the one you are going to first.
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Old 02-23-2005, 04:22 PM   #6
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Default Battery charging

what do you recommend to charge my 3300 gp's. what amp rate?. i'm running stock and 19t. thanks
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Old 02-23-2005, 04:32 PM   #7
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Default Re: Battery charging

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Originally posted by tectron
what do you recommend to charge my 3300 gp's. what amp rate?. i'm running stock and 19t. thanks
charging batteries are more important than most people might think. it doesn't matter what application you are racing in. most people think that charging at a higher amperage is better, but it is not. don't be fooled by these small companies, such as smc, recommending charging batteries at a higher amperage and cutoff. i am not afraid to tell you the truth. your battery will feel faster, but it will only last that way for about one lap until they tapper off. they want you to destroy your batteries so that you will have to buy new batteries all the time. charging at a higher amperage is bad enough, plus having a higher peak detect is just crazy. heat is the batteries worst enemy. you don't have to be a rocket scientist to know how to destroy your packs. smc is showing you how and the other companies that do it similarly.

Last edited by patbrosnon; 02-23-2005 at 06:16 PM.
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Old 02-23-2005, 04:39 PM   #8
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So how do you charge batteries?
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Old 02-23-2005, 04:43 PM   #9
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what about shorting packs during storage?
I don't know anything but what I've read on the internet, doubt i'll ever try this but wanted to know more about this, plus how should I store my packs for 1 week and for months, right now I use them every week but this summer I will probably not be able to run but monthly. thanks
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Old 02-23-2005, 04:43 PM   #10
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Quote:
Originally posted by newbee_racer
So how do you charge batteries?
opps, it must be the age. but to answer your question i use charging methods that trinity and recommend. you what to charge your battery between 4.5amps-5amps with and .02 peak detect. this way your battery doesn't get too hot. if you can help it, you want your charger to stop charging as soon as they peak. then you let them sit for about 5-10 minutes before a repeak to insure a good charge.
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Old 02-23-2005, 04:53 PM   #11
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Quote:
Originally posted by jrdz28
what about shorting packs during storage?
I don't know anything but what I've read on the internet, doubt i'll ever try this but wanted to know more about this, plus how should I store my packs for 1 week and for months, right now I use them every week but this summer I will probably not be able to run but monthly. thanks
shorting packs has its advantages and disadvantages. everytime i've tested that method these were the results:

1) you get lower internal resistance
2) more voltage
3) lower runtime
4) depending on what charger you have, you might experience some false peaks during charging

Not using your batteries for a week should really make that big of a difference. idealy, after each run you want to discharge the battery pack to 5.40v or .90v per cell. before your charge your battery, you want to place them on a discharge board similar to the much more board. as soon as the lights go out, you want to remove them and begin charging your battery. you can also leave your battery on the discharge board longer but it might cause false peaks during charging.
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Old 02-23-2005, 04:58 PM   #12
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so you think the "much more" discharger is the way to go?
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Old 02-23-2005, 05:02 PM   #13
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Quote:
Originally posted by tectron
so you think the "much more" discharger is the way to go?
actually i was just using it as a point of reference. these discharge boards aare made out of resistors that you can purchase out of an electronics store. i made my own, but it's not always better since it gets hot. you can burn yourself if you are not careful while discharging.

so actually i recommend a discharge board such as the much more, integy, or tinity. they have lights that are used as indicators to let you know when to remove your battery.

Last edited by patbrosnon; 02-23-2005 at 05:08 PM.
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Old 02-23-2005, 05:07 PM   #14
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Isn't this thread a little narcissistic?
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Old 02-23-2005, 05:20 PM   #15
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Default Re: Re: Battery charging

Quote:
Originally posted by patbrosnon
charging batteries are more important than most people might think. it doesn't matter what application you are racing in. most people think that charging at a higher amperage is better, but it is not. don't be fooled by these small companies, such as smc, recommending charging batteries at a higher amperage and cutoff. i am not afraid to tell you the truth. your battery will feel faster, but that will only last that way for about one lap until they tapper off. they want you to destroy your batteries so that you will have to buy new batteries all the time. charging at a higher amperage is bad enough, plus having a higher peak detect is just crazy. heat is the batteries worst enemy. you don't have to be a rocket scientist to know how to destroy your packs. smc is showing you how and other companies telling you to do it their way.
patbrosnon - I saw your thread and thought to myself, "Who is Pat Brosnon and why would anybody want to ask him questions?" I changed my mind after reading your introduction in the fist post. I thought it was very admirable for somebody with a lot of RC experience willing to help others out and freely offer advice. Unfortunately I changed my mind again after reading some of your misinformed advice.

Why has track testing proved that charging a battery at 6 amps produces better lap times compared to a 4-5 amp charge in stock and 19T? Why do I have batteries that work well after 2 years of use charging at six amps? Apparently your 20 year experience hasn't helped you with recent battery technology.

Your information regarding dead shorting is also incomplete. The general trend is for IR to decrease, voltage to increase and runtime to drop. However, dead shorting will greatly help some packs, do nothing with respect to internal and voltage on other packs and degrade the performance on other packs. It is a hit or miss process and should only be done on freshly matched cells.

Maybe your advice will improve with motor building and suspension questions.
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