RE: TC4 11.25:1 final Drive Ratio and Mamba 7700, to hot.  
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All Forums >> RC Cars, Buggies, Trucks, Tanks and more >> RC Electric On-Road vehicles, race cars and more >> RE: TC4 11.25:1 final Drive Ratio and Mamba 7700, to hot.
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RE: TC4 11.25:1 final Drive Ratio and Mamba 7700, to hot. - 9/21/2007 10:04:05 PM   
speedracer1129


 

Posts: 153
Joined: 1/11/2006
From: Miami, FL, USA
Status: offline
quote:

ORIGINAL: cheech4

mamba 6900 cannot be run with a 3S LIPO, sorry


Actually, yes you can!! You can run any number of cells to any of the motors AS LONG AS YOU DO NOT SURPASS THE RPM SAFE LIMIT.

Remember, theoretically you can not because when you do the math, you exceed the RPM SAFE LIMIT. However, when you factor gear ratio, wind resistance, drag, weight, etc, etc, you will find that you do not reach those numbers and it is possible to stay within the RPM SAFE LIMIT.

A prime example is actually advertised directly by Castle. The next time you see in the mags the ad of Castle showing Jim Schauer's 1/10 Top Fuel electric dragster that did 104mph in 132 feet, know that he used a Mamba Max 7700 with a 4S lipo.

Now, in LICO's case, that would not work as he is running the car over a great distance which would allow the motor to rev beyond the RPM SAFE LIMIT and cause plenty of damage. But this is to show that it is possible provided you have the adequate knowledge to set it up SAFELY!!!

(in reply to cheech4)
       Post #: 26

RE: TC4 11.25:1 final Drive Ratio and Mamba 7700, to hot. - 9/22/2007 12:41:39 AM   
Lico Miami


 

Posts: 16
Joined: 4/23/2006
From: Miami, FL, USA
Status: offline 		Ok Speedracer, I will look for your address online.
I probably will go to your shop tomorrow on the afternoon.
Thank you,
Lico


_____________________________

Blassed people fly helicopters!

(in reply to speedracer1129)
       Post #: 27

RE: TC4 11.25:1 final Drive Ratio and Mamba 7700, to hot. - 9/22/2007 6:53:09 AM   
myae86rolla


 

Posts: 116
Joined: 11/7/2006
From: san jose, CA, USA
Status: offline 		i have a 7700 setup on my tc3 geared 17/72 and the temps dont go beyond 150 degrees on my motor and 130 degrees on my esc.
note: i also have a fan on my esc and a fan on my motor. i also installed the optional fan ducting kit....

(in reply to speedracer1129)
       Post #: 28

RE: TC4 11.25:1 final Drive Ratio and Mamba 7700, to hot. - 9/22/2007 8:30:16 PM   
Lico Miami


 

Posts: 16
Joined: 4/23/2006
From: Miami, FL, USA
Status: offline 		SO, you have 4 fans? I just came back with my TC4 with new gears.
I am using now 18/75, the temps. got lower, 150 Esc. (with fan) 165 motor (7700MM).
How do you like the optional ducted fans? Do they help?
What is yor final speed? I haven’t timed my car yet.
Since I was able to bring the temps down, we have to agree with Access
about biger pinion helping to bring temps down, I had to much RPM…
Thanks Access for the help.



_____________________________

Blassed people fly helicopters!

(in reply to Access)
       Post #: 29

RE: TC4 11.25:1 final Drive Ratio and Mamba 7700, to hot. - 9/23/2007 3:09:21 AM   
myae86rolla


 

Posts: 116
Joined: 11/7/2006
From: san jose, CA, USA
Status: offline 		i only have 1 fan on my motor and 1 on my esc. i clocked my 17/72 setup with my bushnell radar gun at 50mph with a 7cell 3500 pack. here are some pics.. i like the ducted fans. helps a lot with heat

Attachments
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(in reply to Lico Miami)
       Post #: 30

RE: TC4 11.25:1 final Drive Ratio and Mamba 7700, to hot. - 9/24/2007 12:36:34 AM   
Lico Miami


 

Posts: 16
Joined: 4/23/2006
From: Miami, FL, USA
Status: offline 		Thanks, I will show you mine.

_____________________________

Blassed people fly helicopters!

(in reply to myae86rolla)
       Post #: 31

RE: TC4 11.25:1 final Drive Ratio and Mamba 7700, to hot. - 9/24/2007 11:13:38 PM   
myae86rolla


 

Posts: 116
Joined: 11/7/2006
From: san jose, CA, USA
Status: offline 		let me see those pics..

(in reply to Lico Miami)
       Post #: 32

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All Forums >> RC Cars, Buggies, Trucks, Tanks and more >> RC Electric On-Road vehicles, race cars and more >> RE: TC4 11.25:1 final Drive Ratio and Mamba 7700, to hot.
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