Can anyone tell me how the 13.5 motors stack up head to head against hot brushed stock motors.Been thinking about going bl next year with these,but not if the expense doesent justify me gettin my butt kicked against brushed motors.I don't believe my hometrack(Hot Rod Hobbies,Saugus,Ca)will be offering any kind of seperate class for these motors.Thanks
Dave Werner

From what I have heard and seen they are faster than any stock motor out there. They have beating stock track records at every track around me so far.

The 13.5 motors are AWESOME !!!

At our track, the 13.5 motors are only about 0.3 sec difference from the 4300 motors.

Of course, we really didn't have much choice around here -- brushless is all there is left now, so the decision to go brushless was kind of made for us guys that were still trying to "hold on" to brushed stock class.

went to stateline for a trophy race with a 13.5 and ran. the tq in the 13.5 was 8 laps better than the fastest stocker. the slowest in the 13.5 was 4 laps faster. you must remember though that the setup has alot to do with how fast a stock or 13.5 are and i can't comment on how well those stockers were setup or what kind of batteries they were using i do know that all of the 13.5's were using the new 4200 batteries

Dave, 4300....We may even have a few for Dec.

Dave, 4300....We may even have a few for Dec.
Talkin about next year,sport.You know me,i allways do something diffrent from the other sheep.baa baa baa.Have a great holiday bro & i'll see you in a week at Rods.

The 13.5's are really that fast? Maybe Novak should have gone to 15.5 to better match brushed motors.

The 13.5's are really that fast? Maybe Novak should have gone to 15.5 to better match brushed motors.
Only raced one once but they are pretty quick faster than I was expecting. They seem to be have more torgue like the 4300s do

At BRL #2 in Vinton this past weekend there was 7 laps difference between the 13.5 TQ and the Pro 4300 TQ. Laps times showed about .3 -.4 difference on average.

Also, Since Vinton is my only real reference, Brushed stock record was 70 5:00 with 3800's, new 13.5 record is 74 5:03 with 4200wc's If you factor in the batteries, I'd say the 13.5 isn't remarkably faster than a really good stock motor, but BL motors don't fall off nearly as bad as brushed motors.

Heck, I was running a couple 3.3 is Open BL and finishing with 3.4 and 3.5's, i think only in one run did it fall to 3.6's and that was only the last 2 or 3 laps.

were you freezing the motors or starting @ ambient temperature?

I did not see anyone using freeze spray however I did see some of the guys using the Much More type coolers. I don’t think it really helps because the 13.5 motor does not seem to generate much heat during the run.

The 4300 motors with sintered rotor run 30 to 40 degrees cooler then before. Most come off the track with temps in the 130 range after 5 minutes.

what advantage are the sentered rotors ?

They are a little more reliable and run cooler george. Unfortunately, you have to show ID that you are under 50 to buy one......

Take Care...

The Sintered rotor use a different magnet and some of its advantages are really geared at the Touring car guys. For example it has a stronger magnet which helps with braking and it can withstand higher temperatures without losing strength over time.

In an oval car it runs at a cooler temperature which eliminates the possibility of thermeling the ESC. It’s also more efficient. Allowing you to carry lap times deeper into the run.
The cost (under $30) is a likely a one time investment that should 2-3 years or even longer.

Not sure on the under 50 rule. Sully proved that could be beat last week.

I'm sure you all know, but just to be sure and since this is a 13.5 thread. For the BRL the sintered rotors are not allowed in the 13.5 motors, but are allowed in the 4300.

Good rule!

Man Law??? :thumbsup:

No Sintered in the 13.5..........Man Law!

At my local track we run a spec class. Spec motor, Spec battery, spec tires. For the sake of experimentation we allowed the 13.5 motor for one race in October. The guys that had good spec batteries and a good spec motor were competitive for about 2/3's of the race. When the spec motors started to fall off, the 13.5's kept on running consistent lap times.
I know this doesn't answer the comparability question to a good stocker. But, I think the results would be similar.

The 13.5 class is as competitive as the 4300 class. Just a few laps slower.

you have to undrstand that Peter.Cole (aka Al Spina Fan) is a part time racer,and is more prone to making jokes these days.................. :tongue:

Thanks for the info so far.I still havent made up my mind about going with the 13.5 next year.Seems some places the 13.5 is ballistic,and some other places it doesent fall off & thats the diffrence.I guess head to head is difficult to guage.

Heh the coming of the 13.5 motor was a huge benefit to me. I am not one of the GREAT 4300 racers in my area, and they were all just blowing me away.

Now with this 13.5 motor out I can actually drive the car decently along with the other guys who switched over, and actually have a great time in the process instead of getting out of the other guys way, as they are screaming past me in the 4300 class.