MaxAmps Race Edition Lipos - Page 26 - RC-Monster Forums

josh9mille · 12.03.2010, 03:14 AM

Quote:

Originally Posted by molak

Nitrous in large quantities = low RC ..

Only NA engines need high RC...

That is sort of true, but not really. Nitrous Pro-Mod engines are almost all in the 14:1 range, with VERY few of them being as low as 12.3:1

josh9mille · 03:49 AM

Quote:

Originally Posted by thzero

Might want to take a look at the BigSquidRC 4S Shootout for a graph of the Turnigy's...

Where is that? All i could find were the Lipo tests 1 and 2
EDIT: found it

josh9mille · 03:48 AM

So i just scanned over the 4s shootout, and i have to say it was kind of lame. First off i will say i am a big fan of cheap, so to say i am a Turnigy fanboy is pretty accurate. Why did they choose the 4500 turnigy as opposed to one more comparable to the size of the others? Also the turnigy had the second to lowest C rating and that coupled with the least amount of capacity will give it less voltage under load than the others.....DUH. BUT....the voltage was only like, what, a fifth of a volt less than the highest rated pack? And it was probably due to the fact of the capacity and C rating.

Regardless I will still buy cheap, the price difference between the turnigy and the others was HUGE! Now we just need to see a test of the Nano-Tech's

MindThoughts · 06:02 AM

My thoughts exactly. And the fact that they say- just look at the charts- The charts show everything- was kinda funny because upon looking back at the charts I saw the same thing I saw the first time I read the entire review- That the Turnigy- taking into consideration the details you took into account- are actually totally awesome and right up there with the best of the best- Yet at a very small fraction of the cost. I will say this- for the past year- Hobby King batteries- and Specifically the Turnigy Line of LiPo cells- has become extreemly popular at the tracks. People want what the Pros have, but most will buy what they can afford. And many racers are buying the Turnigy cells to practice with and club race with as well- and often will race the big series races with the more expensive batteries- but one might begin to ask themselves- Why not always run the $40.oo dollar LiPo rather than the 200.oo dollar LiPo. I'm at the point in time where I'm ready to buy my first Turnigy cells- just out of curiosity.

Here is the link to the BigSquidRC LiPo Shootout:
http://www.bigsquidrc.com/lipo-batte...-3-4s-edition/

Quote:

Originally Posted by josh9mille

So i just scanned over the 4s shootout, and i have to say it was kind of lame. First off i will say i am a big fan of cheap, so to say i am a Turnigy fanboy is pretty accurate. Why did they choose the 4500 turnigy as opposed to one more comparable to the size of the others? Also the turnigy had the second to lowest C rating and that coupled with the least amount of capacity will give it less voltage under load than the others.....DUH. BUT....the voltage was only like, what, a fifth of a volt less than the highest rated pack? And it was probably due to the fact of the capacity and C rating.

Regardless I will still buy cheap, the price difference between the turnigy and the others was HUGE! Now we just need to see a test of the Nano-Tech's

E-Revonut · 12.03.2010, 10:47 AM

You'd be surprised how much current you can pull! In my truggy on 5s geared for about 38MPH I had peaks over 160Amps. These MA packs should do great at those current levels, according to the label!!! However I don't beleive their labels as I severely puffed a 5s 5000mah pack in that truck after I lowered the gearing

molak · 11:30 AM

Quote:

Originally Posted by josh9mille

That is sort of true, but not really. Nitrous Pro-Mod engines are almost all in the 14:1 range, with VERY few of them being as low as 12.3:1

Nice copy and paste!

Don't buy the info about racing engines that you find laying around.

I bet my head than several of those engines are close to 10:1... You make more power with lower Rc, since you can spray a lot more and use generous timing ...

josh9mille · 12.03.2010, 11:30 AM

The part of the test i found the most rediculous was the fact that they gave the turnigy pack a 5th place rating in the capacity test, when in fact it held 80mah more than it is rated for. The winner of the capacity test actually held 60mah LESS than it was rated for. Does that make ANY sense at all? In my eyes the Turnigy pack won that section of the shootout hands down! However the seat of the pants test the Turnigy came in dead last, but i would still attribute part of that to the low C rating and capacity size.

josh9mille · 12.03.2010, 11:34 AM

Quote:

Originally Posted by molak

Nice copy and paste!

Don't buy the info about racing engines that you find laying around.

I bet my head than several of those engines are close to 10:1... You make more power with lower Rc, since you can spray a lot more and use generous timing ...

It wasnt a copy and paste, but pretty much word for word what the 3 articles i found online said. I am a drag racer that uses nitrous (not at the pro-mod level), so i know a little bit on what im talking about. I just wanted to check online before i opened my mouth just in case lol

thzero · 12.03.2010, 11:40 AM

More than likely. However, they can only test what they are sent. Personally I think they need to in future shootouts set a specific # of cells, MaH, and C (even though this is subjective as we all know) rating so that its a more even playing field. Nonetheless, seat of the pants testing will always be subjective.

Quote:

Originally Posted by josh9mille

In my eyes the Turnigy pack won that section of the shootout hands down! However the seat of the pants test the Turnigy came in dead last, but i would still attribute part of that to the low C rating and capacity size.

josh9mille · 11:59 AM

Quote:

Originally Posted by thzero

More than likely. However, they can only test what they are sent.

True, but BigSquid chose that 4500mah pack to test, why didnt they choose to test a bigger pack? HK didnt send them a test pack, im sure it was bought off their website just like everyone else buys them. Turnigy do have 5800mah packs, but i dont know what the c rating is on those.

Something just occured to me, maybe since all the packs they tested were hardcase, that that is the biggest hardcase pack turnigy makes? That would make sense. Now im going to have to go look and see......
EDIT: ok so yes that must be the biggest hardcase turnigy makes.

thzero · 12.03.2010, 12:30 PM

Actually I don't know. In at least the first two tests I do believe they were supplied by the manf. with the batteries based on their test vehicle. I'm not sure if they purchased this round or not.

Ah, yes, that would be the reason. I think I was more interested to see the graphs than anything. I would have preferred them do at least 3 runs per battery for the graphs.

Quote:

Originally Posted by josh9mille

True, but BigSquid chose that 4500mah pack to test, why didnt they choose to test a bigger pack? HK didnt send them a test pack, im sure it was bought off their website just like everyone else buys them. Turnigy do have 5800mah packs, but i dont know what the c rating is on those.

Something just occured to me, maybe since all the packs they tested were hardcase, that that is the biggest hardcase pack turnigy makes? That would make sense. Now im going to have to go look and see......
EDIT: ok so yes that must be the biggest hardcase turnigy makes.

josh9mille · 12.03.2010, 12:44 PM

Quote:

Originally Posted by thzero

Ah, yes, that would be the reason. I think I was more interested to see the graphs than anything.

Same here, i didnt read much of it at all, i just scanned it real quick and looked at the graphs. Maybe i should read before i get all excited? lol. But honestly they should have taken the C rating and mah capacity into consideration before coming up with the results. OR they should have gotten packs that were much more comparable whether they were hardcase or not. What is the big deal with the hardcase packs anyway? I have never seen a hardcase lipo in person, but from the pictures i have seen of the case material it looks pretty thin and flimsy.

12.03.2010, 01:01 PM

Couple of you guys said that you would be more impressed if s standard LiPo for an RC car was used and not a larger brick pack. Well Big Squid RC actually did this back in June with one of our packs and it cranked over the car right away with ease:

http://www.youtube.com/watch?v=KfaryxeCNsI

Brandon

E-Revonut · 12.03.2010, 01:18 PM

Quote:

Originally Posted by brandonwilcox

Couple of you guys said that you would be more impressed if s standard LiPo for an RC car was used and not a larger brick pack. Well Big Squid RC actually did this back in June with one of our packs and it cranked over the car right away with ease:

http://www.youtube.com/watch?v=KfaryxeCNsI

Brandon

Although starting s real vehicle does take alot of amps it is only for a second or two and then it can rest for minutes or hours before being needed again. In an RC car or truck we may not be seeing the 200+Amp peaks but we see an average of about 30 amps for 15 minutes with regular spikes in the 150Amp range. The battery is getting a good draw on it for the duration of a run, right to the cut off. Lets see a Max Amp pack take that abuse. My last MA pack that puffed was rated at 100A continuous 200A burst, I was getting bursts of 167A and an average over the run of between 25 and 30Amps.

thzero · 12.03.2010, 01:30 PM

I have a bunch of 2S lipos that are hardcase... they are ok.

The "Deal" with hardcase is that all 2S and 4S lipo packs (only type used) have to be "hardcase" by ROAR specs for ROAR racing. SO might mean something to "racer" crowd (i'd be one but I can't make 5pm start times with being over hour away) but not for the more basher oriented crowd.

Quote:

Originally Posted by josh9mille

Same here, i didnt read much of it at all, i just scanned it real quick and looked at the graphs. Maybe i should read before i get all excited? lol. But honestly they should have taken the C rating and mah capacity into consideration before coming up with the results. OR they should have gotten packs that were much more comparable whether they were hardcase or not. What is the big deal with the hardcase packs anyway? I have never seen a hardcase lipo in person, but from the pictures i have seen of the case material it looks pretty thin and flimsy.