questions re: 3800 and 4200 for stock or 19t motor
#1
questions re: 3800 and 4200 for stock or 19t motor
Maybe this question has been ask already or may have been existing somewhere in this forum, but just for the sake of argument let me give a scenario.
Same car
Same motor
same numbers on the batteries,just different Capacity.
?????
would the only difference between 3800 and 4200 be just the run time?
because right now most battery matchers or dealers are phasing out the 3800's and stocking 4200/4300's.
will the extra $10 be worth it?
4200/4300 are heavier too, isn't it one of the factors needed to be considered?
Same car
Same motor
same numbers on the batteries,just different Capacity.
?????
would the only difference between 3800 and 4200 be just the run time?
because right now most battery matchers or dealers are phasing out the 3800's and stocking 4200/4300's.
will the extra $10 be worth it?
4200/4300 are heavier too, isn't it one of the factors needed to be considered?
#2
Tech Elite
iTrader: (75)
Right now the voltage and internal resistance on the average IB4200 packs is considerably better than my "team" IB3800 packs. Runtime hasn't made a difference in stock or 19T since we had 3300s. In 4- or 6-cell, the punch and consistency they offer should be a LOT of difference in stock.
IMHO, I think that they will make every other battery a practice pack once they are legal everywhere.
IMHO, I think that they will make every other battery a practice pack once they are legal everywhere.
#3
Tech Master
Join Date: May 2005
Location: Under that rock you just kicked over!!!!
Posts: 1,040
Originally Posted by ApexSpeed
Right now the voltage and internal resistance on the average IB4200 packs is considerably better than my "team" IB3800 packs. Runtime hasn't made a difference in stock or 19T since we had 3300s. In 4- or 6-cell, the punch and consistency they offer should be a LOT of difference in stock.
IMHO, I think that they will make every other battery a practice pack once they are legal everywhere.
IMHO, I think that they will make every other battery a practice pack once they are legal everywhere.
my suggestion is that if u get any ( matched or unmatched is to not charge over 6 amps as its not worth it.
secondly drop the pinion on the motor a tooth or too ( ie go smaller) as with the extra voltage you get more rpm.......
#4
Tech Addict
Time for the new battery debate again. Seems these new 4200 SHV cells are touted to have a significant advantage over the last generation of 3800s.
#6
Tech Addict
Thats not the debate Im talking about..Its the cost of staying competitive one. But yeah I keep hearing that about the cells..however I havent gotten to use them or see them in action myself. My personel debate is weither I should just run my 3800s for the rest of the year or take the plunge now. I guess I would only upgrade if the difference was very significant.
#7
Tech Elite
iTrader: (13)
That would depend on how competitive you are/want to be. If you cant drive clean for 5 mins they wouldnt help. If your a A main type driver then they will be a little faster. I personally dont worry about the latest cells.... before a big race I buy a few new packs and then move them to club packs after the race.... just part of racing. The packs I rotate out I then give to the "sportsman" class racers.
Last edited by ottoman; 07-25-2006 at 11:22 AM.
#8
Tech Elite
iTrader: (6)
Well one thing, even though you probably won't have a runtime issue with 3800's I would imagine that you would have more voltage at the end of 5 minutes with 4200's than with 3800's ..that is actually how I "rate" my packs to decide which ones to use for racing i.e. what is left at the 5 minute mark Look here:
http://www.arroyoc.com/rcracing/harshbatcharts.pdf
And you'll see that even though all the packs I charted have plenty of runtime, the newer packs I have picked up have more voltage left at the 5 minute mark, which I wouls suspect that the 4200's have even more so.
http://www.arroyoc.com/rcracing/harshbatcharts.pdf
And you'll see that even though all the packs I charted have plenty of runtime, the newer packs I have picked up have more voltage left at the 5 minute mark, which I wouls suspect that the 4200's have even more so.
#9
Good ? but the answer is the same voltage rules .
A 4200 shv cell will run all over a 3800 cell a low 4200 cell will have a 1.22 average at 35 amps where a great 3800 would maybe be 1.215 There are 1.227 s out there at 35 amps and higher! + much more runtime .Dont want people thinking the 3800 s wont run but if any pro driver had there choice they would grap a 42 over a 38 anyday! hope this helps!
A 4200 shv cell will run all over a 3800 cell a low 4200 cell will have a 1.22 average at 35 amps where a great 3800 would maybe be 1.215 There are 1.227 s out there at 35 amps and higher! + much more runtime .Dont want people thinking the 3800 s wont run but if any pro driver had there choice they would grap a 42 over a 38 anyday! hope this helps!
#10
Super Moderator
iTrader: (2)
Right, though there is one other factor that makes a BIG difference in whether it's a good idea to go with 4200's or not, & that's the driver. It doesn't matter how much of an edge you have in battery voltage, if you have even ONE bad hit on the boards during a race, you just wasted that edge, because every bad impact makes the motor draw a LOT of amps for a few milliseconds(& that takes the edge off the battery's voltage for that discharge cycle). However, if you can keep it clean & smooth for a complete run, time after time, then you may see the benefit of the better pack(but I know of few "mortal" racers who can do that regularly, myself included, I know I'm FAR from perfect). Now, all that being said, from what I've seen from the major matchers, the price difference(for packs of the same performance level, going from 3800's to 4200's) is what, five bucks? To me, that's NOT a significant difference, so it seems like a no-brainer to me, but you certainly don't have to buy any NOW, if you till have good 3800's, keep racing them until it's tme for fresh packs, & THEN get some 4200's(which is what I plan to do).....
#11
well said grizzbob!
#12
Tech Elite
iTrader: (75)
Originally Posted by Grizzbob
Right, though there is one other factor that makes a BIG difference in whether it's a good idea to go with 4200's or not, & that's the driver. It doesn't matter how much of an edge you have in battery voltage, if you have even ONE bad hit on the boards during a race, you just wasted that edge, because every bad impact makes the motor draw a LOT of amps for a few milliseconds(& that takes the edge off the battery's voltage for that discharge cycle).
Very true, but if you really think that way, then I have a box of 1700s in the shop that should still work fine for like 80% of racers who can't run a perfectly clean race.
The fact is, in the always changing battery & motor game with electric R/C racing, bigger is better. While I might not be able to make a perfect 5 or 8 minute run, the extra speed and power from a stronger motor or battery will also help to compensate for imperfect driving. I don't know any racer who thinks that slower motors or batteries are better for them—regardless of whether it is true or not.
And we as racers, regardless of costs, will always throw more power at the car in hopes of making up for any talent shortcomings. I'm not perfect, and at this point, I'm not an A-main racer anymore, but I'll take the 4200/4300s just to make up for what I lack in skill. I'm guessing most everyone else will, too.
Look, the battery complaint has been raging for 30 years in R/C. It won't ever stop, really. Don't bother bickering over it because it is a part of electric racing. By the time we all have 4200s in our pit boxes this winter, there will be one of the battery players ready to release a 4500 or a 4600. You know they are coming, so why worry about how fast everything you own obsoletes and just consider it a cost of racing electric cars?
#14
Super Moderator
iTrader: (2)
Originally Posted by ApexSpeed
Very true, but if you really think that way, then I have a box of 1700s in the shop that should still work fine for like 80% of racers who can't run a perfectly clean race.
The fact is, in the always changing battery & motor game with electric R/C racing, bigger is better. While I might not be able to make a perfect 5 or 8 minute run, the extra speed and power from a stronger motor or battery will also help to compensate for imperfect driving. I don't know any racer who thinks that slower motors or batteries are better for them—regardless of whether it is true or not.
And we as racers, regardless of costs, will always throw more power at the car in hopes of making up for any talent shortcomings. I'm not perfect, and at this point, I'm not an A-main racer anymore, but I'll take the 4200/4300s just to make up for what I lack in skill. I'm guessing most everyone else will, too.
Look, the battery complaint has been raging for 30 years in R/C. It won't ever stop, really. Don't bother bickering over it because it is a part of electric racing. By the time we all have 4200s in our pit boxes this winter, there will be one of the battery players ready to release a 4500 or a 4600. You know they are coming, so why worry about how fast everything you own obsoletes and just consider it a cost of racing electric cars?
The fact is, in the always changing battery & motor game with electric R/C racing, bigger is better. While I might not be able to make a perfect 5 or 8 minute run, the extra speed and power from a stronger motor or battery will also help to compensate for imperfect driving. I don't know any racer who thinks that slower motors or batteries are better for them—regardless of whether it is true or not.
And we as racers, regardless of costs, will always throw more power at the car in hopes of making up for any talent shortcomings. I'm not perfect, and at this point, I'm not an A-main racer anymore, but I'll take the 4200/4300s just to make up for what I lack in skill. I'm guessing most everyone else will, too.
Look, the battery complaint has been raging for 30 years in R/C. It won't ever stop, really. Don't bother bickering over it because it is a part of electric racing. By the time we all have 4200s in our pit boxes this winter, there will be one of the battery players ready to release a 4500 or a 4600. You know they are coming, so why worry about how fast everything you own obsoletes and just consider it a cost of racing electric cars?