***__ The 1/8 Onroad Think-tank __***

[myndseye]

I have since changed the car over to 5s1p, but you can imagine what I was talking about. Sorry about the cell phone pics.

Originally Posted by myndseye

I had considered that when making my suggestion of the A123s. The first thing you need to address would be the power output match of a typical 8th in the small space that you are afforded for your conversion. I was looking around at the various batteries currently out, with your dimensions in mind, and nothing to meet your needs exists. The only hope you have would seem to be something you can quick change, akin to a fuel stop for a typical 8th. I don't really have accurate figures to go from, but it would seem that battery sizes (physically), are about 1 to 1 in runtime with the size of a gas tank when power output is that high. A typical 8th doesn't run that long without needing to be refilled, but I'd bet that if the tank was as large as a 6s high capacity battery, it could run that long.

Sorry myndseye, I made an error in my measurement of available battery space. It should of read like this.

H 27 mm
W 100 mm
L 160 mm

This is the available space under the radio tray. I still haven't decided where to locate the batteries. I'm also thinking if I use 3 seperate 2s1p 5000 mAh packs to get my 6s I can also use these packs individually for racing my 1/10 on-road. Mounting 3 seperate packs on the car wont be fun but at-least I will still be able to use the packs after the nitro 1/8 drivers ban me from racing, because I'm overtaking them down the straights.

myndseye, What speed control are you using?

Anyone out there that can comment on the MGM Compro 160 amp speed controls? My biggest fear is that I end up with a car that is undriveable because the throttle is like an on/off switch.

[myndseye]

I was running a Mamba Max on this one. The two white strips behind the battery are double sided tape where the speed control goes.

Slightly off topic but here are a couple of photos of my 1/10 car.

[myndseye]

These are about the most versatile lipos other than the A123s. With some creative wiring, you may be able to come up with something useful.

http://www.maxamps.com/Lipo-5500-74-Saddle.htm

I did have a look at those but I think the thickness is going to be the issue "34mm X 66mm X 31mm" just a little to thick.
I think I'm just going to work out a way to get 3 seperate 2s 5000 packs mounted on this thing (even if it does look untidy).

[squeeforever]

I think you should be ok for 15 minutes if you use the 5000mah Flightpowers.

[nl12]

I would run 4s on a 1/8th onroad, these cars RTR can weigh less than the wheels and tires on some MTs. If you could fit 4s2p or 4s3p of smaller packs that may be ideal

Here is the best layout I can come up with with 3 separate 2s packs (Dummy packs are 10mm longer than actual packs). I think this would keep the left to right balance fairly close. The dummy motor appears to fit perfectly. I'm having a friend machine up the pinion carrier which as you can see will have to be extra long. The electronics (receiver,speed control and brake servo) will be mounted on the top plate.
I would really like to mount the motor using some sort of "band clamp" type mount. So far I haven't found anything any link/suggestions?

Originally Posted by Countryhick

Sorry myndseye, I made an error in my measurement of available battery space. It should of read like this.

H 27 mm
W 100 mm
L 160 mm

This is the available space under the radio tray. I still haven't decided where to locate the batteries. I'm also thinking if I use 3 seperate 2s1p 5000 mAh packs to get my 6s I can also use these packs individually for racing my 1/10 on-road. Mounting 3 seperate packs on the car wont be fun but at-least I will still be able to use the packs after the nitro 1/8 drivers ban me from racing, because I'm overtaking them down the straights.

Uhm, why don't you use 2 3s1p maxamps 5Ah lipos?
http://www.maxamps.com/Lipo-5000-111-Pack.htm
They are 45mm X 138mm X 26mm so no need for 3 separate packs, only two...

Bye

I race 1/10 electric on-road usually and the 2s packs are the only ones I can use under the current rules. So if I use 3 x 2s packs I can use them in my 1/10 and 1/8 (just better bang for my buck). Looks like I'm going to run these. http://www.trakpower.com/

I now have a good idea of the hardware I need. Now I need to look at chargers and balancers. I have one of these already (only good for 4s I believe) http://www.robitronic.eu/elements/ap...erloader_e.pdf
1. What is going to be my best option for charging 3 separate "Trakpower" 2s packs at the same time?

2. I would like to get a balancer at the same time.

Recommendations please

Cheers Andrew

OK, I have been given a better donor car than the old Vector. I now have a Serpent 950R, not a huge deal of difference but it is more refined and a little more current.

I want to get started on my custom motor mount but I need to know the exact outside diameter of a NEU1512 motor (1.5y to be specific) but I will take any information I can get (I know the NEU website says 40mm but would like to see if there are any slight tolerances). I would measure my own but I don't have it yet I'm still waiting for Mike to reply to an email.

If you have a 1512 could you please measure the outside diameter and post or pm your results (.00mm resolution would be nice). I'm interested to know if there are any lips where the end plates are as I'm making a band type clamp and this will effect how well it will hold the motor.

I'm catching up with a guy this weekend who has a vacume former and works with CF. We are working on a CF battery tray and side intrusion protection for the packs. I have attached a couple of pics of his work, all custom made by him, it's very nice.

[BrianG]

Originally Posted by Countryhick

I now have a good idea of the hardware I need. Now I need to look at chargers and balancers. I have one of these already (only good for 4s I believe) http://www.robitronic.eu/elements/ap...erloader_e.pdf
1. What is going to be my best option for charging 3 separate "Trakpower" 2s packs at the same time?

2. I would like to get a balancer at the same time.

Recommendations please

Cheers Andrew

The charger in your link is good for up to 4s. Are you wanting to charge all three packs in series, or seperately? If in series, a single 6s capable charger and a balancer like the LBA10 will work fine. You'll just have to make a special type of Y charge and balance adaptor.

Sorry, can't help on the 1512 dimensions...