dangerwr

iTrader: (5)

Hey guys,

I just wanted to chime and & ask why fans? Believe me, i have 2 in a package from Evercool--ball bearings and everything. I have just never found the reason to need them--even in very hot August temps. What gives?

X God

iTrader: (3)

No tone if the speedo doesn't see the motor

Galeleo

iTrader: (3)

The fan is rather important, it serves three purposes:

1. Allows the ESC to give the audio tones when turned on

2. Cools the ESC,

3. Blows out the dust accumulated on the heatsink. If you don't have the fan, there could be enough dust build up to create a dust-blanket on the heatsink and impair its ability to dissipate heat.

If the fan wasn't needed, then Tekin engineers would not have included it. Running without the fan would be suicide for the ESC, unless your running in december on an ice track

Integra

iTrader: (8)

I run a 1900 set-up and gear at either 44/15 or 45/15

run the stock C1 setting's and try it....Try C2 and see if you get any improvements.




I dont run a fan Nor does Ty and Randy...so Suicide i think not .....layer of dust I dont think so....The ESC will chime with or without the fan plugged in.

Randy_Pike

iTrader: (6)

The fan has NOTHING to do with the audible chime. The chime is actually created by the motor! No motor contact, no chime.

The fan is also NOT required to run the Rx8. I rarely run one at all. As long as you've got some airflow through the body you'll likely be fine. Gearing and setup are key to good temps on the esc and motor.

If you're Rx8 has no chime but arms try this first: Unplug the sensor harness from the esc, see if it now chimes and runs.

For Rx8 setups with gearing info:

http://www.teamtekin.com/hotwire/ESC...up-sheets.html

BOLISARIO

iTrader: (57)

Randy,

I tried unplugging the sensor harness from the esc and still no chime or throttle. The motor checked out fine because I used a friend's MMP and throttle works so all that's left is the esc.

All the solder posts have a good solder connection and there's continuity between the wires with a voltmeter.

Does that mean I have to send this one to Tekin again?

rock3ralex

iTrader: (28)

something you should try is looking at the low voltage cutoff. if you have it set for the wrong pack config, it won't arm. I had it set to 4s while running a 2 and the esc wouldnt arm until I fixed it and changed it to 2s.

BOLISARIO

iTrader: (57)

Like I said it arms and does the whole start up sequence but no chime or throttle. I even took out LVC at one time and still no luck.

pascalfd

iTrader: (5)

My experience shows it's the other way around : running the ESC with the fan is suicide for the fan. The last one I put on came back with not one blade left at the end of the day lol.

Galeleo

iTrader: (3)

Ya, i noticed that today. I went out for some practice at my local track and noticed that I am missing 2 blades!!

I do stand corrected on my last post btw. Anyhow, I run the fan since it adds little weight and it provides some feedback in regards to temps, when I hear the fan running, I know the ESC is warm and gives me a cue to check the temps. I am rather cautious with temps and would rather over check than under check. The last thing I need is for my ESC to thermal or worse yet, my batteries to get too hot/puff and burn my car to the ground.

Looks like I am on the hunt for a new fan too...

I have to say I have run my newly converted brushless buggy about a dozen times with my RX8/1900 combo and I have to say it is a total pleasure to drive! I don't know why I waited so long to run electric, but I know my nitro is not going to get run any time soon!!

X God

iTrader: (3)

Just wanted to give a update. Ran a Tekin RX8/T8 1700 on 4s geared 46/21, software 208 at the Missouri State Offroad Championships yesterday for the first time. The car was faster on better handling then the 2050 system I had run for the past 2 seasons. 90+ degree day and the motor never got hotter then 150. Ended up winning the A over some pretty fast nitros.

Bman's 3XNT

iTrader: (71)

Congrats man, My Tekin systems ran awesome as well yesterday. Making Tekin the 5th Annual "Rc Monster Bash" Champions in 1/8th Buggy and Truggy @ Station 2 Raceway in Ny. I also Tq'd over Monster Mike himself by 1 second in Buggy and his team driver Ben White, by 6-7 seconds in Truggy! Tekin faired well at a Castle sponsored event! Second week in a row my new style Tekins outperformed the competition. I am so happy that it seems the bugs have been worked out. These things are crazy fast and crazy smoooth! RC Driver also sponsored/covered the event and is going to be in their up coming issue. Thanks a ton Tekin...........Boomer

godzila

iTrader: (4)

Cool, Thanks for the info guys.

hairdog

iTrader: (33)

I ran my RX8 / 1550kv yesterday and had a miserble day. I was previously running it on 5s 5000mah lipos and moved up to a 6s 5800kv yesterday. The first issue I had was when I gave it full throttle it acted like the ESC was cutting off and would hit the brakes for a split second giving the popping noise from the center diff jumping the gears. I had the current turned down to 70. I figured the ESC wasn't getting enough juice so I bumped it up to
90. That seemed to fix that.

Next due to the torque of the motor with the added voltage I destroyed 2 rear diffs.

Then to finish it off the ESC started acting up . I don't know if it was from over heating but it acted like it was hitting thermal cut out. I was so ill at it I didn't get it out to check it today.

I am very pleased with the RX8 . I just think changing the battery threw the set up off and caused the over heating issue. I'm running the same gearing as I had with the 5s. Should I have went down in pinion to compensate for the added voltage ? Would that help the over heating issue? I'm currently running 15/45 in my Losi truggy. I'm not giving up on it. Just looking for some guidance.

jhautz

iTrader: (86)

Almost all of the problems you described could be attributed to over gearing. You need to gear down to compensate for the additional voltage. Should fix almost all of the problems you described. Dropping down to 12 or 13T pinion should be about right.