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Old 11-26-2008, 04:09 PM   #1
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I am currently running a novak 13.5 ss and an LRP AI I was running laps today and I was coming off of the track with my esc at 160 and motor at 125-130 do i neet to go up in pinion is is winding up to fast? I have now 66sp/32p some of my friends are running the same motor and esc but there pinion is 34 35
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Old 11-26-2008, 05:53 PM   #2
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anyone?
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Old 11-26-2008, 05:55 PM   #3
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the best thing to do is go to the novak website and look at what they recommend for the FDR on the 13.5t motor in what ever your using it in then go to www.gearchart.com and enter in a spur and pinion size select your car and go to the screen where it shows you all the options but make sure the spur size will fit in your car.

Hope that helps.
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Old 11-26-2008, 05:56 PM   #4
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also put a fan and heat sink on your esc if you havent already.
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Old 11-26-2008, 06:28 PM   #5
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the FDR from novak is 4.5 that is wicked fast, so if i go up in teeth i should technically run cooler? motor already has a heatsink and fan will be tomorrow
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Old 11-26-2008, 06:38 PM   #6
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4.5 is about right for a starting point FDR on a 13.5. Small track size and technical layouts require smaller pinions. A motor running over 170 will cause the GTB to thermal and shutdown. So you don't want to overgear. But if you undergear a motor it can also run hot. When you have excessive tire spin the motore runs hot.
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Old 11-26-2008, 06:40 PM   #7
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Quote:
Originally Posted by Tulsa TC3 View Post
the FDR from novak is 4.5 that is wicked fast, so if i go up in teeth i should technically run cooler? motor already has a heatsink and fan will be tomorrow
Yes, generally speaking when a motor is geared with a low FDR and its getting hotter than recommened then moving to a higher FDR should allow the motor to run cooler.

Less teeth on pinion = higher FDR
More teeth on spur = higher FDR

One thing to be mindful of however is that going too high in FDR can also have the motor come off the track too hot. The motor revving itself at high rpms will also heat up.

-Mark

Ps.

I have run a 13.5 LRP (original x11 w/ bonded rotor) for the last few weeks and run an FDR of 5.8.
The track is indoor/carpet/rubber and fits on a basketball court and is about 80m to complete a full lap, very technical layout.

Just be careful of manufacturer recommendations, track size/layout/surface play a part in selecting the appropriate gear ratio for your motor.
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Old 11-26-2008, 06:46 PM   #8
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Its my esc heating up, so something is working to hard somewhere right I have changed all the bearings on the car and it by the way is a TC3 as far as i know everything is free. The speed controler is an LRP AI I have two friends that are running the same set-up just two teeth larger on the pinion I am at 66 32 would that be two small and cause it to rev to much and that is why my speed control is getting to 160
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Old 11-26-2008, 06:51 PM   #9
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The track I run on is Adams creek raceway in Broken Arrow,OK about 3/4 of a basketball court and about 3/4 as wide one long straight lots of 4 or 5 tight turns, who know maybe its my driving style
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Old 11-26-2008, 06:54 PM   #10
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That could be the case, where an undergeared motor causing the ECS to always be wide open (techniclly speaking)..
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Old 11-26-2008, 06:55 PM   #11
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I wouldnt overlook the ESC as being the problem itself....

I have used an LRP AI ESC and noted that even for a 27T brushed, when on the performance end of things, is possibly too much for the ESC.

-Mark
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Old 11-26-2008, 07:05 PM   #12
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I have thought about that a few times beleive me, I just dont understand why my friends run cooler the motor is not even really gettiin over 130. When I was using a 27t the esc ran at 108 consistently and motor never got over 90
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Old 11-26-2008, 07:10 PM   #13
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I have used a 35t pinion and it was screaming fast the fdr was like a 4.71 4 min into the heat it shut off found I was dragging some screws on the track and might of overloaded the esc from the drag, I went brushless and everything is weird, what do your esc's usally run at (those of you that dont have a fan and what is your FDR) just a Q
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Old 11-26-2008, 07:16 PM   #14
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I personally think that a fan is required only for the fast motors (10.5 and lower windings). A 13.5 and higher windings, I don't use the fan.
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Old 11-26-2008, 07:23 PM   #15
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but for my speed controller? My motor tempseems to be ok but know that I think about it my motor did hit 160. I dont know what is going on or maybe its geared just right and I just need a fan on my SPEED CONTROLLER( I am going to wear that word out) the car is fast I have been running decsent lap times for just starting out 9.6 lol and it took me a couple of week to get there. I AM PARANOID
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