Novak Ballistic 6.5 running hot...

[blue_pinky]

Hi all,

I have a 6.5t Novak Ballistic in my B44, running vampire lipos via a spread spektrum GTB.

Another guy at my club runs roughly the same setup, same vampire lipo's, standard GTB and Novak Velociti 6.5....so very similar.

On our tranny's, he runs with his exp down by 30%, mine is down by 25%, his end point is 100%...mine is set at 85%

On our tracks, in the same heats with similar lap and race race times his motor temps come off in about the 120's (F) mark, whereas mine have been coming off in about the 150's-160's (F) mark.

We run in a small(ish) hall and are both geared on 21's on kit spur, which for me runs in the 160's. I've played around going to smaller pinions down to an 18 or 19 from memory, which reduced temps a little...down the the 150's.

Esc temps are fine as well by the way.

Transmission all spins freely and feels good as far as we can tell.

So, my question is this...could my driving style...throttle control inparticular cause such a dramatically different running temp? Could the EPA setting be having an effect? Or is there something else that could be causing it? Really want to get my temps down if I can.

Any suggestions gratefully received!!!

[Marvin]

My guess is that it is UNDERgeared. If the motor is hot, but the ESC and Lipo are both cool, then it is an indication of undergearing. I've had to use this before in brushless 1/8, and in fact, gearing up reduced motor temperatures.

[blue_pinky]

I've wondered this myself...but got put off a little by the temps going up 10 degrees+ when I changed from an 18/19 up to the 21...maybe I should try higher and that 10 degree change was actually just a different race thing then?!?!

Still unsure why it should vary so much in temps from another car that is very similar though???

[sosidge]

Why aren't you running 100% EPA Andy?

It seems to be the only difference in setup.

I know people say the brushless speedos aren't bothered by limited EPA in the way that brushed speedos were... even if that is the case, the limited EPA is probably tempting you to hammer the throttle more.

Full power and a softer finger on the trigger may be the answer.

[blue_pinky]

I only checked the epa after we'd finished last week, first thing on my list is to turn it back up this week.

The 4wd responds sooo much more directly than the 2wd that it was a bit of a shock when I first got it! I found it easier to run indoors with it turned down to begin with...just felt a bit safer

When we gonna see you over at Caldicot again by the way? It's been a while!

[sosidge]

Originally Posted by blue_pinky

I only checked the epa after we'd finished last week, first thing on my list is to turn it back up this week.

The 4wd responds sooo much more directly than the 2wd that it was a bit of a shock when I first got it! I found it easier to run indoors with it turned down to begin with...just felt a bit safer

When we gonna see you over at Caldicot again by the way? It's been a while!

Having a few electrics related issues. Need to upgrade to LiPo and brushless but haven't decided how to spend my money just yet... not that I have any money.

Also been doing a little *ahem* touring car *ahem* racing at Chippenham. But my touring electrics are dead also!