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Old 03-09-2014, 08:50 PM   #12451
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I have a 104t 64 pitch spur and a choice between a 30t or 34t 64 pitch pinion gears. Are the in the ball park of should I look for different sizes?
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Old 03-09-2014, 09:29 PM   #12452
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I have a 104t 64 pitch spur and a choice between a 30t or 34t 64 pitch pinion gears. Are the in the ball park of should I look for different sizes?
you're going to need a much smaller spur.
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Old 03-09-2014, 09:50 PM   #12453
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Grab a 55 or 60 spur
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Old 03-09-2014, 10:39 PM   #12454
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The Novak ballistic 17.5t 12.5mm rotor was fast at 3.4375fdr and stock N timing... I was pulling other cars down the straight easily, and had good punch in the infield for an overweight(1448gram) tc4.... My Car's handling was Off though... No alarming heat coming Off the motor after six Minutes...
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Old 03-10-2014, 05:10 PM   #12455
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you definenetly need a smaller spur. 104/34 is a fdr of 7.64. The smallest 64p spur robinson makes is a 73 with a 45-47 pinion youd be in the ball park. but honestly unless your deadset on 64pitch id swap back to 48. Its little to no dremel work and atleast where i live i can get 48p at my lhs I have to special order 64
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Old 03-10-2014, 07:12 PM   #12456
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Originally Posted by MD View Post
I have a TC4 Club Racer with front and rear regular diffs.I am looking for a good vta setup for low grip carpet.
several are posted on the AE site...here is mine

http://www.teamassociated.com/pdf/ca...d_vta_2013.pdf
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Old 03-11-2014, 08:26 AM   #12457
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depending on track size you'll want to start with a 4.0 fdr and adjust from there. I believe my car runs 60spur 38pinion which nets a fdr of 3.94. You can also run a 55t spur and drop a few pinion teeth. robinson racing is the gears i use
does a FDR of around 4.0 apply to any 17.5 motor setup?

so suggestion is to start at 4 and go up in FDR ?

thanks!
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Old 03-11-2014, 09:03 AM   #12458
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It really depends on teh track more than the motor you use.

Most 17.5 Motors are pretty close in terms of power (as they should be)

For tight small tracks I would look to start about 4.5 and see what kind of lap times and temps you are getting but for larger and flowing tracks I have gone down to 3.7 again you still need to pay attention to heat and lap times to set your proper FDR

Timing of the motor also will help fine tune the car but I would start about half way in your timing settings and get optimal gearing before playing with timing.
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Old 03-11-2014, 09:25 AM   #12459
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It really depends on teh track more than the motor you use.

Most 17.5 Motors are pretty close in terms of power (as they should be)

For tight small tracks I would look to start about 4.5 and see what kind of lap times and temps you are getting but for larger and flowing tracks I have gone down to 3.7 again you still need to pay attention to heat and lap times to set your proper FDR

Timing of the motor also will help fine tune the car but I would start about half way in your timing settings and get optimal gearing before playing with timing.
thanks for the clarification, that helps!

I will mainly race on a small track and on occasion a fairly large track. I was thinking higher than 4.00 so your suggestion of 4.5 sounds good.
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Old 03-11-2014, 11:42 AM   #12460
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For 17.5t motors, the sweet spot will vary greatly on the timing of your motor & track size, but the limits of gearing are clear: 3.4fdr(high) to 4.2fdr(low) on carpet.....
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Old 03-12-2014, 08:14 AM   #12461
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For 17.5t motors, the sweet spot will vary greatly on the timing of your motor & track size, but the limits of gearing are clear: 3.4fdr(high) to 4.2fdr(low) on carpet.....
thanks! sounds good. Im going to try 4.55 to start and see how it is and then drop down and try again.
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Old 03-12-2014, 11:38 AM   #12462
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What i like to look for is 1) how hard the car pulls from the slowest corner. tune gearing for the best pull vs straight speed 2) Straight speed. Pay attention to where you hear the motor stop accelerating. Depending on the track anywhere from 2/3 to 7/8 of the straight.

Should get you into the realm. on a smaller track remember the straight is less of an importance as it's over fast. you need pull out of the corners. If you can stay tight a slightly slower car can be faster around the track
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Old 03-12-2014, 04:12 PM   #12463
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The way I gear is for competitive straightline speed first, and heat Check after six Minutes, since brushless motors have lots of torque at N(30) timing... I leave the timing alone, and that helps keep the heat down... So far 3.4375fdr allows my tc4 novak 17.5t(12.5mm rotor) to pull many cars down the straight, with good pull out of the corners, and no heat.... The Car is still accelerating at the End of the straight, but that's because I don't have good enough handling to power through the last turn before the short straight... I also have to deal with low rpms of the Novak motors vs the d3.5 motors.....
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Old 03-12-2014, 06:42 PM   #12464
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I don't think you have enough decimals in your stated gearing.
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Old 03-13-2014, 01:31 AM   #12465
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At this point my search for competitive Novak gearing is a success: I was catching d3.5 powered cars on the straight... All that's left is to increase rear traction, and I'll make the Amain... I did a 29 lapper with lots sliding around and crashes, while the TQ guy was on a 35 lap pace... I could not power through the corners, and had a 9.46 sec fast lap, while the record fast lap was 8.3 seconds, with most folks averaging in the 8.9's with top notch chassis... The future is looking very bright for the tc4....
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