im looking for speed

[bernyberns]

ok i have a 10 scale exceed on road car with a gtb 5.5t brushless system. i got the stock gearing. 58t spur gear and a 26t pinion. i dont know what pitch but its either 32 or a 48.

i got a crappy 6s 2000 nimh battery. i punch the charge up to 1.4v per sell. and it gets the job done. don't know actual mph. car is shaft driven to

i want to get really fast. like 70 mph. what do i need to reach that speed. i mean everything i need. motor, esc, battery, gears, whatever. also why these 200+ 10 scale esc so limited. like only being able to use 2s lipos. but a plane or boat esc for 70+ plus dollars handles 6s lipos

[bernyberns]

guess no one likes to go fast

[Jackster]

Frankly, that gear ratio sounds like a melted system waiting to happen.

[bernyberns]

Originally Posted by Jackster

Frankly, that gear ratio sounds like a melted system waiting to happen.

y is that? thats to much for the gtb?. also my gtb never ever get hot. barley even warm

[bernyberns]

anyone?? no one goin even 60 mph in here??

[Danny-b23]

Get a ESC with timing advance, like the Speed Passion GT2.0, a good durable servo like the Futaba 9551, a 3.5 Brushless motor, and get a high mAh pack.

Car, you might want to go with a 10th scale pan car, like the BMI DB10RR. With that you can then get a Can-Am body for really good downforce. Mon-Tech makes a GHIBLI that would be perfect for high speed.

[abailey21]

Originally Posted by bernyberns

anyone?? no one goin even 60 mph in here??

Your best bet is look at the ISTC website and forums, these are racers in here for the most part, not bashers or speed runners.

The ISTC is ALL speed runners!

[PaPeRo]

You'll probably need a motor that could handle 3S LiPo minimum. From there it's just getting the appropriate ESC, gearing and battery. Battery should be able to output 70A+ so probably a 30C rated pack.

Mamba 5700kv + 3S 5000mah 30C LiPo should get you beyond 70mph if your car is able to stay on the ground. The Traxxas Bandit VXL is capable of 70mph out of the box and it's only using a 3500kv motor.

[bernyberns]

thank you guys. i will check out that other forum also. guess ill be selling some of the stuff i got now

[bernyberns]

Originally Posted by PaPeRo

You'll probably need a motor that could handle 3S LiPo minimum. From there it's just getting the appropriate ESC, gearing and battery. Battery should be able to output 70A+ so probably a 30C rated pack.

Mamba 5700kv + 3S 5000mah 30C LiPo should get you beyond 70mph if your car is able to stay on the ground. The Traxxas Bandit VXL is capable of 70mph out of the box and it's only using a 3500kv motor.

now thats what im talking about lol. thankx for the basic guideline. my car came stock with a 75a brushless esc and a 3300kv motor. its can handle 3s lipos. i think im very limited when it comes to gearing though. for the exceed cause they only have one size spur gear. least that i could find. looking for a new car now

[b4maz]

Take a look at this calculator I wrote. It will help you figure out what kind of power you will need:

http://www.scriptasylum.com/rc_speed/_speed_amp.html

Vehicle Weight (lbs): 5
Vehicle Width (in): 8
Vehicle Height (in): 4
Pinion Tooth Count: 26
Spur Tooth Count: 58
Transmission Ratio: 2.3
Differential Ratio: 1
Other Ratio: 1
Tire Diameter (inches): 2.5
Tire Ballooning (in): 0
Drag Coefficient: 0.35
Total Voltage: 6
Electrical Efficiency: 85
Target Top Speed (mph): 70
Time to Get to Top Speed: 7
Usable Output Power: 452.91 watts (0.61 HP)
Input Power Required: 710.44 watts (0.95 HP)
Input Current Required: 118.41 amps
Motor Torque: 0.1 ft-lbs
Axle Torque: 0.53 ft-lbs
Average Acceleration: 4.47 inches/sec
Acceleration Force: 10.14 meters/sec^2
Acceleration Gs: 0.46 G
Required Motor RPM: 48290 rpm
Required Motor KV: 8048
KT constant: 0.17 oz-in/A

The ISC website is here. Make sure your car isnt ugly, or they wont accept it in their "speed database".