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-   -   brushless questions.. (https://www.rc-monster.com/forum/showthread.php?t=4085)

rcsammy 09.18.2006 04:18 AM

brushless questions..
 
i have decided im going to get a B4 and put a mamba maxx in it, will hopefully get the B4 soon but will run brushed while im saving for a mamba maxx

im kinda stuck between the 5700 and the 7700, i obviously want as much speed as possible which would be the 5700 if i ran on 12 cells or 3s lipo
but the 7700 would give me more speed for just general use which i would probably run 6, 7 or 8 cells on
im leaning towards the 5700 then i have the option to go insanely fast if i wanted

can someone tell em what runtimes would be like with 6 cells? 8 cells?12 cells? 3s lipo?

say i normaly ran 8 cells or somthing if i wanted to go out for some speed runs with 12 cells or 3s lipo would i have to change the gearing?

im not sure if i want to go lipo or not, what are the advntages of them?
60 mph with a 3s lipo sounds very tempting, although i have heard they are quite dangerous if overcharged or treated wrong?
how much am i looking at for a decent lipo and charger?


i think thats all the questions i have for now

thanks

Serum 09.18.2006 06:32 AM

Take the 5700, i can guarantee you won't be dissapointed. It's a blast on proper 2S lipo's already.. You can get 1400-1500 watts from a good 2S pack. Go figure.. :)

captain harlock 09.18.2006 07:04 AM

Lipos are no longer as dangerous as they were in the past.
What you really need is a good lipo charger( Do NOT use any lipo charger), good lipo cells ( MaxApms, Evo20, Kokam,etc), LVC device( I guess Graupner and Schulze have some) and a good balancing system ( Hyperion and FlightPower's V-Balance are said to be very good).

7700 motor would take you to the 50s easily with 6 cells and you really should not go over 6 cells or 2s with that thing as it already been working like crazy with 6/2s cells.
5700 is the most popular among the people who run 1/10th 2wd, 4wd off road.
Its speed is very nice at 7.2V, but its scary fast at 12-15V. You do need to pay close attention to your differential and you should remember that the B4 becomes very fragile with super powerful brushless setups.

I do have some other setups for you to take your car to a new level of speed you really dont want to experience, but you should not try it, since your buggy wont bear it at all.:cool:

rcsammy 09.18.2006 09:26 AM

i havnt actualy bought the car yet, whqat one would you recommend?

rcsammy 09.18.2006 11:50 AM

iv been thinking...would T4 shock towers, tyres and shell fit on a B4?
because the chassis of the B4 looks stronger but the T4 has the truck body which would protect it more and biger tyres to help keep the front down

glassdoctor 09.18.2006 12:06 PM

I have both T4 and B4.... I'll have to look to see about the towers swapping, I have no idea.

But.... I'd just get a T4 if I were you.

The chassis are the same, truck is just longer/wider arms. Why do you think it's weaker than the buggy?

rcsammy 09.18.2006 12:54 PM

Quote:

Originally Posted by glassdoctor
. Why do you think it's weaker than the buggy?

looking at the pictures on the team associated website the B4 arms look stronger
maybe a T4 would be better, they are hard to find over here in the UK though

glassdoctor 09.18.2006 01:11 PM

In racing, I've never seen more breakage in the trucks than the buggies. The only time I broke my T4... I clipped a brick wall when I pushed wide coming out of a corner full throttle. Snapped the arm. Any vehicle I think would have. ;)

The arms are longer... hang out there a ways... but they are built a little thicker than the buggy's.

rcsammy 09.18.2006 01:34 PM

ok, well i think im going to have to get whatever one pops up on ebay first
im watching a B4 FT that ends in a day so will see what happens

rcsammy 09.18.2006 01:49 PM

what are T3s like? i found one on ebay
are spares still available? do they share many parts with the T4s?

glassdoctor 09.18.2006 02:08 PM

The T4/B4 are a completely new platform, so the B3/T3 won't share many parts at all. Some things can be swapped, but it will change the geometry etc. if they do "fit".

I have a B3 still laying around to compare, but never had a truck before the T4.

I don't know any reason to think the T3 is less durable... in fact I seem to recall others saying the T2/T3 are probably more durable than the T4. But his stuff is subjective... kinda like my dads smarter than your dad.... chevy vs. ford etc...

In the U.S. parts for the "3" cars are still easy to find. Tower has them... LHS probably are hit and miss since the T3 hasn't been sold for what, 3 years now?

rcsammy 09.18.2006 02:14 PM

hmm i will stick to a B4/T4 then

rcsammy 09.18.2006 05:08 PM

i just missed a losi MF 2 go on ebay for £40 they are £270 new :eek: :035: :019:
but i have pretty much sold my stampede now and a motor for £67

squeeforever 09.18.2006 05:22 PM

Don't get a Losi if you want durability...They are awesome racing machines, but bashing, they just can't take it. I have a XXX BK and there not really that durable.

rcsammy 09.18.2006 05:47 PM

thats good to hear then as i didnt win it
the guy who bought my stampede is paying by cheque though so i wont have the money to get one by next weel:026:


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