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-   -   17.5t (https://www.rctech.net/forum/radio-electronics/962242-17-5t.html)

andrewd 09-18-2016 01:33 PM

17.5t
 
I know this has probably been asked so many times but just can't seem to find the post.

i run mainly indoor now and on a good sized track at a FDR of 3.8

what make is a good 17.5t motor for indoor racing

bertrandsv87 09-18-2016 02:13 PM

Fantom FR-1 type M 17.5t, properly matched with the esc... There are others, but not as good ....

jlfx car audio 09-18-2016 02:45 PM

If you want a fantom I'll sell you 3 for the price of one ... Wasn't impressed .
R-1 v11,reedy M3 1s(w/273 rotor),motiv
Only options on carpet

Joe Maxey 09-18-2016 04:08 PM


Originally Posted by jlfx car audio (Post 14674797)
If you want a fantom I'll sell you 3 for the price of one ... Wasn't impressed .
R-1 v11,reedy M3 1s(w/273 rotor),motiv
Only options on carpet

Sorry to steal the thread but I have found with the Fanton 17.5 you may need to adjust the drive frequency(avaliable on some esc) to get the most of the motor.

All the top 17.5 are very capable of winning. Once you find the right timing(power band for your gearing & track), final drive & esc settings. Esc's have become a very big part of going fast in spec classes.

nwagner 09-18-2016 05:07 PM

You know what they say about opinions... and you're going to get a lot of them with that loaded question, haha.

Juan Aveytia 09-18-2016 05:29 PM

Team scream "the one" motors have been excellent for everyone that has bought that motor. R1 their more expensive motor is always fast. Team powers with the end bell that has timing number to 6 is excellent. Can't go wrong with any of those. But there are other brands that work well

bertrandsv87 09-18-2016 05:42 PM

That is exactly why I said " properly matched to the esc" . When you get the correct radio setting, drive frequency, gearing, timing , and lower the car's rotational mass a bit (under 58grams Without tires, 48grams on the tc4.2 ), then it's over for the non fantom competitors....
You will know you have reached the optimum settings when your motor sounds like a Honda engine when the Vtech kicks in : do not go too far in the gearing after that, instead look for innovative ways to reduce your car's rotational mass(aluminum/plastic, etc,)...

Originally Posted by Joe Maxey (Post 14674906)
Sorry to steal the thread but I have found with the Fanton 17.5 you may need to adjust the drive frequency(avaliable on some esc) to get the most of the motor.

All the top 17.5 are very capable of winning. Once you find the right timing(power band for your gearing & track), final drive & esc settings. Esc's have become a very big part of going fast in spec classes.


tobyzhang 09-18-2016 06:03 PM

Many people as the question which 17.5 is the best but I found that is asking the wrong question. The right question should be which spec is going to work for the track you are at. Most of the ROAR motors have about the same overall potential but are good at very different power bands. Short stack seems to be all we talk about these days and for good reason. The cars are so much lighter now with LiPo that motor can afford to sacrifice low end torque and heat capacity for more top end power. I can't think of a track small enough for modern touring car or 2wd buggy to benefit form a standard stack design anymore. With that said, the rotor is important. If you run on small track, go with the strongest rotor, at around 1600 range. For bigger track with more speed most of the time, go with 1500 to 1550 range rotor. If the track is really really big, go with a weaker rotor 1450 to 1500 range. Timing is also related to where you want the motor to perform, lower timing= better performance at lower range and higher = better performance at higher rpm. Gearing is also about the same for most motors in similar conditions. You can ask a local fast guy and where he is geared at and usually it will only be a tooth or 2 off + or -.

With these basics you can pretty much make any top brand motor perform to a competitive level. Of course different motors will feel different and have different edge at different conditions, but overall most top shelve motors will perform if you tune it correctly and choose the right rotor.

Uncle Rico 10-12-2016 04:46 PM

Looking for some input regarding this issue. I am running dirt mod oval in a spec 17.5 motor class. I have the following motor:

17.5 Turn FR-1 Works Edition PLUS Brushless Racing Motor


Regarding a ESC to match this up with I am considering either of the following:

HobbyWing JUSTOCK Club Spec Stock ESC (1/10 Car) (1/10Th Scale)

or

Tekin RS GEN 2 SPEC Sensored Brushless ESC


I have heard many good things about the Hobbywing, but then others mentioned concerns about being only 60 amps. As such the Spec Tekin would seemingly alleviate those concerns. Any thoughts on which is the better way to go.

Thanks,

awtwac 10-17-2016 07:34 AM

Short stacks are def flavor of the moment. Then again, fast guys at my track are winning with a wide variety of motors. Seems like a good bet to just get a reputable brand's motor (Trinity, Fantom, Maclan, etc.), match to a good ESC, and find proper gearing.


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