R/C Tech Forums

R/C Tech Forums (https://www.rctech.net/forum/)
-   Electric On-Road (https://www.rctech.net/forum/electric-road-2/)
-   -   Tamiya mini cooper (https://www.rctech.net/forum/electric-road/20068-tamiya-mini-cooper.html)

jsinclair 09-23-2011 10:33 AM

I just put my m-05 together last night. The speed control has a low voltage cut off to protect "LF" batteries, what is a "LF" batt? And what voltage cut off is it set up for? Thanks

jcr 09-23-2011 10:46 AM


Originally Posted by jsinclair (Post 9694511)
I just put my m-05 together last night. The speed control has a low voltage cut off to protect "LF" batteries, what is a "LF" batt? And what voltage cut off is it set up for? Thanks

LF stands for LiFe batteries. Haven't figure out what the cut off voltage is at.

sosidge 09-23-2011 11:49 AM


Originally Posted by jcr (Post 9694460)
Are you sure it is 66.5mm? That seems kind of long.

I built up the Super Mini CVA with 3mm spacer and got 56mm total length.

Sorry, I meant 56.5.

jsinclair 09-23-2011 12:02 PM


Originally Posted by jcr (Post 9694558)
LF stands for LiFe batteries. Haven't figure out what the cut off voltage is at.

Ill figure it out tonight, and post my results here. My charger has a motor drive function, and ill just keep dropping the voltage until it cuts out.

monkeyracing 09-23-2011 03:41 PM

The lowest voltage recommended for LiFe is 2.4v per cell.

clayrace24 09-24-2011 09:12 PM

Mini Motors /esc question
 
I just put a stock Johnson motor in my M05 Pro after running it on a 17.5 and the dropoff in speed is significant. I'm running a really cheap futaba esc, but have a Sphere and a Cyclone I couild use if I choose to. Should it make any difference at all in punch to run a better controller? Been a while since I ran a brushed motor. Is it still recommended to do the water dip treatment on a new Johnson motor?

Clay

clayrace24 09-24-2011 09:23 PM

Is anyone using the rear sway bar on the long chassis setup? I can't figure out how to get it to work due to the position of the shocks in the long setup. Help is appreciated.

Clay

jcr 09-24-2011 10:18 PM


Originally Posted by clayrace24 (Post 9699748)
I just put a stock Johnson motor in my M05 Pro after running it on a 17.5 and the dropoff in speed is significant. I'm running a really cheap futaba esc, but have a Sphere and a Cyclone I couild use if I choose to. Should it make any difference at all in punch to run a better controller? Been a while since I ran a brushed motor. Is it still recommended to do the water dip treatment on a new Johnson motor?

Clay

On another note what Esc is good for silver can? Is the stock tamiya teu 104bk good enough?

monkeyracing 09-24-2011 10:28 PM

Unless you're running at a very competitive level - national or international - the stock ESC will do the job just fine. I've seen more than a few guys with the old stock 101BK easily win against others running Tekins, Novaks, LRPs, etc. You might find more adjustments in a higher end ESC, like drag brakes, but the stock one will do fine.

As for motors, we've just started running controlled 17.5T/2200kv motors at our club. They match the top speed of a good silver can quite well, but definitely pull harder out of the corners. Is this what you're experiencing, or is it an actual loss of top speed?

Jim

caltek1 09-25-2011 12:18 AM

Swaybar MO5L
 
3 Attachment(s)
See attached pictures for the rear swaybar on a MO5L. I do not use a front swaybar only on the rear. I also find at some tracks that it not useful, so I just disconnect one of the rear supports.

BTW,

Car setup has changed since these pictures.

Calvin.

clayrace24 09-25-2011 12:59 AM


As for motors, we've just started running controlled 17.5T/2200kv motors at our club. They match the top speed of a good silver can quite well, but definitely pull harder out of the corners. Is this what you're experiencing, or is it an actual loss of top speed?
Both punch and top speed are noticeably less. The motor I put in was previosly used and I know nothing of it's history. I have a brand new one that I'm going to put in next and see how that goes.

Thanks for the input .

Clay

caltek1 09-25-2011 02:17 AM

Latest Incarnation of my MO5L
 
5 Attachment(s)
A couple of dirty pictures of my MO5 LWB after racing. Certainly needs a clean. :nod::lol:

Mr_Gleeman 09-25-2011 02:44 AM

Cal, that's a disgustingly dirty car for a photo shoot :deathstar:D

Interesting Lipo pack you got there what is it?
I'm sick and tired of buying Lipo's that get pregnant and I have to throw away!

Question: What causes this swellage and is this one you have any better?

P.S I treat my Lipo's with the utmost respect, charge them at a sensible rate & don't short circuit them, what's going on is it just me?

caltek1 09-25-2011 03:06 AM

John,

It's like its owner, dirty.

The Lipo is a LRP 4600 30C. These are not cheap. I got one to try and have been happy with it, although the IP3800 is very popular and will be the next batteries I get for mini.

I don't balance my packs and I don't touch them after racing. Just leave them until the next week and top up when i get to the track.

My batteries get a workout as I practice normally once a week and race twice a week when I'm home. Other than that they get left for periods of up to a month were they stay in the Lipo sack.

I have only had problems with swelling packs in Touring Car and the old 4000 IP Lipo packs. I must add that I thoroughly abused those packs and still have a couple I use for practice. These I would run to cutoff, which I had set at 3.8 volts per cell. This certainly hurts the batteries as they do not last as long. They are soon destined for greenier pastures.

BTW,

I have cleaned the car, ready for tomorrow night, providing the rain disappears and the sun comes out.

Later,

Calvin.

YankeeFan123 09-25-2011 08:02 AM

If anyone has a body that will go on a m03 that has the longer wheelbase, already painted or not and they would sellit,as long as itdoesnt have any cracksplease PM me


All times are GMT -7. It is currently 10:20 PM.

Powered By: vBulletin v3.9.3.9 Patch Level 3
Copyright © 2026 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.