New hi-speed project - Page 4 - RC-Monster Forums

BrianG · 12.27.2007, 07:25 PM

Well, I'll just have to tighten up the steering and set the radio for exponential steering to maintain fine control. How heavy is it right now with the 1512 and 5s?

lutach · 12.27.2007, 08:14 PM

You can use the 2200mAh packs from KongPower. I have used them as high as 120A bursts. I have 2 2200mAh packs that had a max burst of 128A and they are lighter then the higher capacity packs.

BrianG · 12.27.2007, 08:35 PM

I'm thinking about setting it up so it can run in two modes:
- High V/low capacity/high C rate cells and gear very high for the top speed runs. I won't need long runtimes for this.
- Lower V/high capacity/fair C rate cells and gear more conservative for playing around in lots/streets and such.

gimpygolden · 12.27.2007, 08:53 PM

The car ready to go with my PolyQuest 5000mah 5s pack in it weighs in at 8.012lbs.
That doesn't include the body and it's with foams.

BrianG · 12.27.2007, 10:22 PM

That's about what I was figuring. Pretty hefty for a high speed vehicle, but it should help with traction and to keep the front end from flipping.

Speaking of which, did you bias the weight front/back at all? I was thinking of trying to have the weight distribution set to something like 60% front, 40% rear, and then use a rear spoiler to help rear traction...

gimpygolden · 12.27.2007, 10:28 PM

i have the batt on one side motor and servo on the other with a mount across the rear diff holding the esc.

p.s there is no traction on this lead sled,thats why I'm going such a huge pinion

BrianG · 12.27.2007, 10:35 PM

Hmm, I hope I can find a tire that will give me some sort of traction. Burnouts are cool at first, but tires can get expensive. Whatever ESC I use, I'll probably turn the start power really low to help with that instant torque...

gimpygolden · 12.27.2007, 10:38 PM

i've yet too run the foams,but i think they'll be less grip on asphalt but at least they'll stay togethet

myndseye · 03:00 AM

Seems we all have the same idea. IGT on 6S of TP V2, geared 44/25 thanks to Mike. Powered by a 224 MGM and a Neu 1527 1D. I dont have the motor pictured in this one, but it just dropped right in. Had to make sure the motor wires were at the top though.

BrianG · 12.28.2007, 10:45 AM

So, what motor mount did you use?

myndseye · 12:13 PM

I used the Kyosho mount from Mike. I will have you guys know that when I ran the 1527 1D on 6s, it was serious overkill. This chassis did not present enough load to generate any heat in the motor, and contrary to what most may think, and in my experience, I feared hurting the motor that way. I have seen what wide open throttle does to a brushless setup without a load. I now have a 1512 1D on the way for a 4s setup, and will reserve the 1527 for another project. Can anyone say 5th scale brushless.

BrianG · 12.28.2007, 12:15 PM

I think maybe you misread my question: What motor mount did you use? lol, still nice to know about your motor experience though.

If you underload or unload a motor, the motor usually gets quite warm. If your motor temp was cool, it was probably a good match. I think I'll stick to at least a 1515 since I'll be gearing VERY high. The 1527 is too big IMO.

myndseye · 12.28.2007, 12:23 PM

I think it was just interesting timing. I loaded the page early this morning to post the second listing and didn't get around to it until just a little while ago. When I loaded the posting, I noticed it wasn't the last one anymore, so I edited it. You just posted a reply in the time of my edit. It's all out of sync.

BrianG · 12.28.2007, 12:45 PM

lol, that's funny.

So, it's the Kyosho mount. I assume no modifications were necessary to use it? I like the fact that the mount still allows the use of mechanical brakes...

myndseye · 12.28.2007, 04:35 PM

No modifications that involved anything worth mentioning. As you can see, I opted for the single speed setup. I had a Kanai 2 buggy lying around to rob parts from, so I just used the center diff from it. I replaced the steel 46 tooth gear that was on it with a 44 plastic one I got from Monster as well, and it all just bolted right up. Maybe there was a difference in length for the front center shaft, but as I was getting the CVD's from the K2, so there were no problems. The slots for the screws in the mount had to be dremeled out a bit to accomodate the thicker mounting screws that the 1527 needed, but that was nothing major.