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Associated TC4 Questions

Associated TC4 Questions

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Old 07-01-2016, 02:00 PM
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So, I bought a TC4 a few days ago and it should be here soon. I have an RC10B4.2 with a Reedy Brushless system that I planned on moving to the TC4.

The motor is a Reedy 540-SL 3300kv
The ESC is a SC600-BL (2S/3S Support)

Here are my questions:

Does anyone by chance have an idea what the top speed would be with a 7.4 Li-Po and 11.1 Li-Po?

Is it good to have a locked front diff?

Will I have a lot of torque using this motor, causing a lot of wheel spin?

If the motor does throw a lot of torque into all 4s, what would be good tires to enhance grip/traction?
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Old 07-01-2016, 02:44 PM
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Originally Posted by Vyevchevski View Post
So, I bought a TC4 a few days ago and it should be here soon. I have an RC10B4.2 with a Reedy Brushless system that I planned on moving to the TC4.

The motor is a Reedy 540-SL 3300kv
The ESC is a SC600-BL (2S/3S Support)

Here are my questions:

Does anyone by chance have an idea what the top speed would be with a 7.4 Li-Po and 11.1 Li-Po?

Is it good to have a locked front diff?

Will I have a lot of torque using this motor, causing a lot of wheel spin?

If the motor does throw a lot of torque into all 4s, what would be good tires to enhance grip/traction?
If geared super tall to the moon I would say top speed would be around 70 on 2s and maybe 90 mph on 3s with good batteries.

The TC4 club racer comes with a front spool and a rear diff. You will probably get some wheelspin if you are not easy on the throttle.

Contact foam tires are good. Pretty cheap too.

Last edited by tc4basher; 07-01-2016 at 04:02 PM.
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Old 07-01-2016, 03:00 PM
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Originally Posted by tc4basher View Post
If geared super tall to the moon I would say top speed would be around 70 on 2s and maybe 90 mph on 3s with good batteries.

The TC4 club racer comes with a front spool and a rear diff. You will probably get some wheelspin if you are not easy on the throttle.

Context foam tires are good. Pretty cheap too.
Well I will be running a 48P/21T Pinion and the Stock Spur Gear, but unsure of how many teeth it has. But this will be temp until I can fine tune it.

What is the difference between having a locked diff to having a standard diff? Which is better for performance?
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Old 07-01-2016, 04:05 PM
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Originally Posted by Vyevchevski View Post
Well I will be running a 48P/21T Pinion and the Stock Spur Gear, but unsure of how many teeth it has. But this will be temp until I can fine tune it.

What is the difference between having a locked diff to having a standard diff? Which is better for performance?
With a 21 tooth pinion and the stock spur the speed will be probably half of what I said.

Not sure exact differences in locked or non locked diffs but a locked diff should act like a spool. Wheels on both sides will spin the same time. Should be more power to the ground. I run front and rear spools.

Last edited by tc4basher; 07-02-2016 at 05:49 PM.
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Old 07-01-2016, 08:08 PM
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You'll probably get a lot of torque and wheel spin with a pinion as small as 21T. Gearing and tires will depend on what you're using the car for and on what type of surface.
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Old 07-01-2016, 09:08 PM
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I'll run mostly pavement. The parking lot near by is good smooth pavement, no rough spots.
So, it may be a good idea to use a bigger pinion then? I want to maybe start racing again, although it's been many years, so I'm rusty. Lol
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Old 07-01-2016, 09:11 PM
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Hi Vyevchevski, My TC4 came with diff's front and rear. some say front spool is better. I haven't tried it yet. Also, mine came with a 72 tooth spur and 23 tooth pinion. Great for brushed motor (17T). I'm running a 60t spur, 44t pinion 17.5t motor set up. Seems to work well for bashing. Sounds like that's what you intend to do. Hope this helps.
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Old 07-02-2016, 08:14 AM
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Originally Posted by 1spunspur View Post
Hi Vyevchevski, My TC4 came with diff's front and rear. some say front spool is better. I haven't tried it yet. Also, mine came with a 72 tooth spur and 23 tooth pinion. Great for brushed motor (17T). I'm running a 60t spur, 44t pinion 17.5t motor set up. Seems to work well for bashing. Sounds like that's what you intend to do. Hope this helps.
Great thanks, good to know. I couldn't seem to find how many teeth the spur has. I will be running a brushless rather than brushed.
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Old 07-04-2016, 02:12 AM
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The tc4 is perfect with the 3300kv motor installed, not too much stress on the drivetrain... Good luck, and make sure you read all the info on the tc4 thread as much as you can....
By the way guys, I finally installed the last remaining parts of my Mods, and my tc4 tub chassis weighed in at 1332grams ready to race, down from 1448grams when I started it all... The only steel parts left are the rear axles, the shock shafts, and the front lcd drives...
I know I have 50grams or so to add to balance the car while making the 1380gram minimum weight....

Last edited by bertrandsv87; 07-04-2016 at 01:35 PM.
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Old 07-04-2016, 08:24 AM
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Originally Posted by bertrandsv87 View Post
The tc4 is perfect with the 3300kv motor installed, not too much stress on the drivetrain... Good luck, and make sure you read all the info on the tc4 thread as much as you can....
By the way guys, I finally installed the last remaining parts of my Mods, and my tc4 tub chassis weighed in at 1332grams ready to race, down from 1448grams when I started it all... The only steel parts left are the rear axles and the front lcd drives...
I know I have 50grams or so to add to balance the car while making the 1380gram minimum weight....
So in other words I may not need to gear it down?
I'll do that if I can find it. Lol
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Old 07-04-2016, 10:52 AM
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You will need to gear it down between 4.0 fdr to 5.0fdr.... You will need a smaller 60T 48p Robinson spur gear, and pinions to match(30T to 37T).... Good luck......
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Old 07-04-2016, 12:09 PM
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Originally Posted by Vyevchevski View Post
Great thanks, good to know. I couldn't seem to find how many teeth the spur has. I will be running a brushless rather than brushed.
I just mark one tooth with a sharpie and count them. That is if I can't find the markings on them.
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Old 07-04-2016, 03:57 PM
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Originally Posted by bertrandsv87 View Post
You will need to gear it down between 4.0 fdr to 5.0fdr.... You will need a smaller 60T 48p Robinson spur gear, and pinions to match(30T to 37T).... Good luck......
You'll probably need to grind some of the webbing on the chassis to get the larger pinions to fit.
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Old 07-04-2016, 04:18 PM
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It takes time to get the tc4 running fast and handling good... Like another racer adviced, you'll need to get rid of that chassis web under the pinion gear first before fitting bigger than 30T pinions ....Post a video of the car in the near future. I got to go get some aluminum 7075 axles and lcd drives made ASAP to lose the last 12grams off my drivetrain....lol....
STEEL IS BERT'S #1 ENEMY !!!
Originally Posted by Vyevchevski View Post
So in other words I may not need to gear it down?
I'll do that if I can find it. Lol
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Old 07-04-2016, 04:56 PM
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Originally Posted by bertrandsv87 View Post
It takes time to get the tc4 running fast and handling good... Like another racer adviced, you'll need to get rid of that chassis web under the pinion gear first before fitting bigger than 30T pinions ....Post a video of the car in the near future. I got to go get some aluminum 7075 axles and lcd drives made ASAP to lose the last 12grams off my drivetrain....lol....
STEEL IS BERT'S #1 ENEMY !!!
Get multiple sets done, aluminium is pretty soft and will wear very fast if used as a cardan joint.
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