Hey dont know if i sound weird asking this question but why is 13.5 still considered a stock motor for 27t... I gess this would be a question for Novak but from our local track standings there is no comperison to 13.5 on a 120ft runline track the 13.5 puts more laps on the 10.5 guys and it is very close only by 1 or 2 laps..

Has you track seen diffrence from 10.5 to 13.5 and does anyone run the 13.5 cars with the 17.5 cars or 27t class??

Why is 13.5 considered stock for 27t motors i think it is amazingly more faster..

how about you.....:thumbsup:

I dont think anyone thinks it it the same speed. It was originally thought that it would be about the same as a stock motor. The info you are reading may be old. 13.5 is about 3 laps or more faster than stock. 10.5 should be about 3 to 5 laps faster than 13.5. So with all things being equal if you run all these classes this is what you will see for speed.

Stock
17.5 (1 lap faster than stock on most tracks)
13.5 (as stated above)
19 turn (a lap faster than 13.5)
10.5 (as stated above)

3 years ago 10.5 (4300) was advertised to be the same as stock. But that was also with the SS speedo and bonded rotor. Speedo, rotor, and learning the gearing along with setups, have all made the 10.5 what it is today. Same thing happened with the 13.5. 17.5 is right now truely stock speed. I do see it getting alittle faster in the future but so have stock motors over the years(decades).

Hey Z you going to michiana this weekend....
Ill be down with the new LE chassie..

TB

Yeah Big Show... Derek hit it on the head. 13.5's, when they were first out, were running with stock motors. My buddy at the Oval Madness race last year won stock over some 13.5's. With the sintered rotors, and guys figuring out the 13.5, they're nowhere near stock.

The first 13.5 was a little slower than a stock motor but now that it has a sintered rotor it is definitely faster than a 27t.

13.5 is about what 19 turn was 3 yrs ago for speeds.

I also think as you tweek a little with the car setups and other little things the 17.5's will be picking up the pace, also. I think they may are becoming a tad bit quicker than stock. I like it. My $.02...

-Brad

that and most rc's run 6 cell. so the speeds might be closer? I'm not sure just throwing it out there

There is more to the speed with BL compared to brushed. I really think the efficiency of the motor is what makes the BL faster in the long haul of the race. When tuning the old stockers (27T) efficiency was the last thing (if at all) we looked at. Raw power (Watts) and torque and definitely RPM. Now the power,torque in BL are really close but it seems that RPM varies with each motor due to mfg tolerances and/or timing that we tend to mess with.

I remember when the 4300(10.5) first arrived and was sold as a stock 27T motor. Gearing and handling has shown that a really good setup and driver can be as fast as the next higher power motor with a not so good setup.

Why 13.5? Because it just about the right speed in off-road/touring and when put into 4-cell oval it is just about the right speed. And many people are just tired of having to change motor classes as the upgrades make their "stocker" faster.

Any slower, people may get board, any faster people may get scared.

I'm not sure how some of you geared your 13.5, but all versions of the 13.5 (including bonded rotors) are faster than a 27T brushed. Many people never really "asked" their 13.5 to work for them. On average, you'd need to gear 10-20 teeth higher than a brushed motor. I guess some people didn't believe you really had to gear that much higher. Either that, or they couldn't properly lay down the extra power due to the track or car setup.

Anyway... here is how much power these motors generate at 7.2V:
A perfectly tuned 27T brushed: 130 Watts of power
17.5 brushless with sintered rotor: 130 Watts of power
13.5 brushless with bonded rotor: 165 Watts of power
13.5 brushless with sintered rotor: 195 Watts of power

The 13.5 may be the new replacement for the 19T class. Most likely the 10.5 popularity will die off a bit. It's looking like it will shape up like this:
Stock: 17.5 brushless or 27T brushed
Super Stock: 13.5 brushless
Modified: Any motor

21.5 and Lipos is a tick faster then 4 cell and 13.5.

Lipos IS the NEW electric!!"

James35,
what do you mean gear higher? are you going closer to 1-1 or going away from1-1?
some say lower some say higher. are you saying go to say a 200 from a 300 or to a 400 just as an example.
thanks, willis.

He means closer to 1:1.

jdearhart,
thanks, that is what i thought.
later, willis.