i purchased a 4300 Gtb system and it has been a dog since i bought and haven't been able to figure out why sent it back to novak they said everything was ok guys say well its all about set up, well if you can hold a 4300 wide open around a mid to small track something is wrong ran it with a class of 13.5's just to see comparison they stayed dead even with me on the straight away then guys say its gearing so i guess what i'm askin is how in the world do you figure out how to gear these things gearing is the only thing left wanted to run some brl races with sonny b and the boys but no way this thing will keep up any ideas can't hurt thanks

is this a sintered rotor 4300/10.5 motor?

What size track?

FOAM Tires on Carpet?

Capped Tires on Asphalt?

I'm sure somebody will be able to help in the morning...

I am just getting into brushless but from what I have been reading, temp is probably the best way to "check" your gearing. The problem is I hear different temps as being "ideal". I have just ordered a temp gauge so I can start looking at motor tempas it comes off the track. Will shoot for the 170-180 degree range.

i purchased a 4300 Gtb system and it has been a dog since i bought and haven't been able to figure out why sent it back to novak they said everything was ok guys say well its all about set up, well if you can hold a 4300 wide open around a mid to small track something is wrong ran it with a class of 13.5's just to see comparison they stayed dead even with me on the straight away then guys say its gearing so i guess what i'm askin is how in the world do you figure out how to gear these things gearing is the only thing left wanted to run some brl races with sonny b and the boys but no way this thing will keep up any ideas can't hurt thanks

Along with the info swtour asked for, where are you rolled out now?

Will shoot for the 170-180 degree range.

That is kinda high, especially if you'll be running 13.5, which I assume you are since you have been looking for something a bit slower. My car has been the fastest with the motor in the 145 to 150 range in 13.5.

that is interesting, I was using information on the instruction sheet from NOVAK. Is anyone else out there using different temps? List motor size, track size, roll out, temp at the end of 4 min? thanks but again it is interesting how much different information there is out here on the web...AND.. how much is the temp affected by the track temps, Wisconsin 82 degrees, South Carolina 98 degrees, how much does that affect temp measurements/motor performance?

Ralf, 170-180 is a bit high for temps. sometimes that's ok but shoot for 150's-160's. I am in HOT AZ and doesn't matter from winter to summer rollout hasn't changed @ all.

that is interesting, I was using information on the instruction sheet from NOVAK. Is anyone else out there using different temps? List motor size, track size, roll out, temp at the end of 4 min? thanks but again it is interesting how much different information there is out here on the web...AND.. how much is the temp affected by the track temps, Wisconsin 82 degrees, South Carolina 98 degrees, how much does that affect temp measurements/motor performance?

I don't know that the Novak instruction sheet means much. Also, could it have been written with the old bonded rotor in mind?

The ambient temp effects things to some degree. How good your car is effects things to a much greater degree. If your car is right then expect a motor in the 150 range and if you car is off expect it to be higher.

I think the novak sheets were for the old bonded rotors...and for heavier 6 cell touring or offroad cars.

I think oval is finding it's own way of doing and checking things...

My bonded rotor 4300 pulled over 180 degrees last time I ran it, when I switched to the sintered motor I dropped about 25 degrees at a tooth taller....and motor wise felt I was in the speed range (of course the driver was on another planet, but that had NOTHING to do w/ the motor)

So you are saying about 155-160 degrees is about the right heat range? Is this the same for 13.5? How about the new 17.5 motor? Is this a good range for ALL brushless motors? This seems to be one easy, measurable, repeatable way to check your gearing at different tracks so am trying to get a handle on it. I have 13.5 motors now but have already ordered a 17.5.

Personally like I said before I would aim more in 150 territory with 13.5. Above 160 and I typically have an issue somewhere, either car is too tight, over geared or rarely an issue with the motor itself.

The easiest most repeatable way to check gearing is to keep going up until you stop going faster. I think temperature can be deceiving and actually tells you a lot more about your set-up then it does the gearing. With BL there is about a +/- 2 tooth range where the car will go about the same speed, so there is a pretty fat sweet spot.

We haven't done much with the 13.5 out here yet, there is a group trying to get it started, but so far I've too seen them run 10-15 degrees cooler than the 10.5's, not sure why yet - I would almost think since you are PULLING the RPM out of them it would be the other way around...

17.5 w/ LIPO, I'll get Josh to answer on - I don't think I got his temps , when I ran it w/ 4 cell - I didn't get to temp it - and by the time I got done marshalling it was too cool to tell anything (I had it propped up on my BLUE BLOWER FAN)

Ralf......Aim for 150 and you'll have a tooth either way to play with. A poor handling car can send the motor temp up by 20 degrees.

ralf running my 13.5 at lails i see about 160 to 170 but at greeneville it was about 130

4300 with cintered rotor don't know run line at tracks but my system won't go over 135 degrees no matter what gearing and i know another guys never been over 120 degrees also with temp when you gear you could make it run at the same temp and be under or over do i start by adding teeth with pinion or taking teeth off

If the motor is cool and the car seems slow then you'll probably want to add teeth. Can you give any information that might give us a clue as to where you should be geared?

What is the track surface?
What is a "fast" lap in 4300?
What is the highest you've tried rolling out?

Pat Where did you gear your 13.5 for Marshalltown Thanks Steve Lawson

I didn't write it down, but I think 4.20 to 4.30 rollout.

carpet is surface fast lap is 3.5 highest rollout 250

That sounds a little low. Give 2.75 a try and see if it helps.

ok thanks alot man definitely need the help

Where you're running, I was in the 2.20 - 2.30 range for rollout, ran 71 with the 4300...