14.2 second 1/3 mile? (oval)

[squeeforever]

You might want to look into a Xtrema. It charges 10S. And no, you can't balance them together but charge them seperated I don't think.

[glassdoctor]

I think you will be fine on those batts. You aren't drag racing so the current spikes won't be that bad I don't think. Once you are up to speed I think you will be well within the limits of the batts... wild guess would be 50-60A.

[MetalMan]

I also think that battery setup should be fine.

You can use the Smart Guard 505 with it connected only to the battery. I'm using that balancer with my batteries now, and since you can only charge up to 3amps with it between the battery and charger, I am charging with it separated so I can charge at higher rates.

You could use two LBA10s networked together, but as has been stated you can't charge them on two different chargers.
What you could do is get two SM505s and charge each battery separately on your 109s. That would end up being the least expensive balancer setup.

[squeeforever]

Or you could just use the 2 LBA10s seperate of each other for charging and then simply network them together after the batteries are charged to balance them further.

thanks for all your help w/ this guys.. the more answers i get, the more questions i think up :eek:

Originally Posted by squeeforever

Or you could just use the 2 LBA10s seperate of each other for charging and then simply network them together after the batteries are charged to balance them further.

new question, do you think that'd be needed? if I'm discharging the packs parralelled, and am charging with the same setups, off the same power supply, how much do you think the two packs would differ after a run? after 20 runs? this is all foreign to me =\

[BrianG]

Instead of getting two LBA10's, why not just get one ThunderPower 10s balancer (can't recall the model number)?

[MetalMan]

The TP balancer is the TP-210V. It's $100, so it costs more than the other balancing ideas mentioned. It would only be worth it to use the TP balancer if you also have the TP-1010C charger, so the two can be linked together to help keep the packs in the best shape (and to have the safest charging station).

squee's idea would work, but two SM505s would be cheaper. I guess it just comes down to cost.

[Serum]

Okay, now you did it!

i was thinking about a project like this too, i was looking for a nice chassis. the serpent 960 is just a bit too expensive to use imo.. Nice, but for the few times i want to ride it, or can ride it this xr8 is perfect.

I personally would make the battery-mounts from carbon fibre. Lighter and stiffer. the 7XL is awesome on 5S, i use it too, on 5S 1P maxamps, the current draw is a tad too high, so i thought about getting another 5s1p pack to support the others a bit..

Originally Posted by Serum

Okay, now you did it!

i was thinking about a project like this too, i was looking for a nice chassis. the serpent 960 is just a bit too expensive to use imo.. Nice, but for the few times i want to ride it, or can ride it this xr8 is perfect.

I personally would make the battery-mounts from carbon fibre. Lighter and stiffer. the 7XL is awesome on 5S, i use it too, on 5S 1P maxamps, the current draw is a tad too high, so i thought about getting another 5s1p pack to support the others a bit..

carbon fiber's could happen, if I want to spend that much money on this.. I don't have all that much to spend right now, that's why this is such a slow progressing thread =\

I just read about the neu motors, and I'm very curious about them... the 1515s will fit, but what rpm am i looking for? the 1515/1.5D is 2700kv, which seems like it's the best motor for my voltage.. does the fact that these are four pole motors instead of two change my rpm range? ideas?

[glassdoctor]

No rpm is rpm... so you want to still match the kv to your speed goals. These motors are very nice. The batteries and speedos like them better than the chinese motors...

[Serum]

4 pole motors are normally know for their higher torque. So power/rpm wise..

I took the Neu 1515 that does 2200rpm/v. which should be more than okay on 5S lipo..

ok, so I got the controller and motor..
went with a neu 1512/2.5d smooth canned motor.
i also got 16, 18, and 20 toothed pinions. the 20tooth doesn't fit on the shaft.. just a hair too small, so I'll have to file it out a little bit. but.. with the 20tooth on, it just BARELY will work w/ the stock 49t spur (1st gear). rather then get even bigger pinions, I'd like to try different spurs. they make a 50t spur, but I'd like to find larger than that.. say 52-54 tooth spurs? needs to be nylon/plastic, and needs to be M1. the mounting configuration doesn't really matter, because it will be very easy to adapt to the car. the quark controller is fairly big. I can set it down right where the tank used to be, but it doesn't sit flat then because of a plastic mounting piece.. so i've got it laying across the chassis, but it's VERY close to the brake servo and the center belt.. I may make a quick shim so it will fit lengthwise. I'm hoping to get this running sometime this week.. I still need a steering servo, and ubec.. as well as the lipos.. I got a good deal on a laptop, so the lipo's will have to wait another 2 weeks or so. I'll run my 2400's until then.. and for right now, it only looks fast :) I'll get pictures once I get the servos, and ubec, and have it all ready to go.

eh.. so anyone want to point out some larger M1 spur gears for me?

[glassdoctor]

HPI makes a 52T plastic gear... I don't recall what type gears fit your car..

[Serum]

Yes, there are 52 spurs for the savage. GPM makes them from delrin (cnc'ed)