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Schumacher Mi7

Old 11-21-2019, 10:05 AM
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What is a good starting spur for 17.5 on a medium size black carpet track?
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Old 11-21-2019, 11:07 AM
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Im using a 100t
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Old 11-21-2019, 12:20 PM
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Originally Posted by ChadoSan
What is a good starting spur for 17.5 on a medium size black carpet track?
I guess I should actually say what is a good final drive ratio to start with?
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Old 11-21-2019, 01:49 PM
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That depends on the motor you are using. Start with 4:1 and work your self up or down to get the laptimes you need. Some guys in my club run 4.21:1 while I use a Team Powers Actinium V3 with a super strong rotor and I run 3.8:1
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Old 11-21-2019, 09:44 PM
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Really curious to see this car on asphalt more. Due to winter approaching I'm sure everyone is all carpet.

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Old 11-22-2019, 04:03 AM
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Originally Posted by STLNLST
Really curious to see this car on asphalt more. Due to winter approaching I'm sure everyone is all carpet.
my friend is racing it locally and it looks really good
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Old 11-22-2019, 05:14 AM
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Originally Posted by Marcos.J

my friend is racing it locally and it looks really good
what class is he running?

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Old 11-22-2019, 07:34 AM
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Originally Posted by STLNLST

what class is he running?

17.5
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Old 11-22-2019, 11:52 AM
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Originally Posted by ChadoSan
What is a good starting spur for 17.5 on a medium size black carpet track?

Depends on how you have timing set on your motor, as power generated changes the torque curve when you adjust it.

Essentially you don't want to run out of RPM at the end of a straight, and gearing accordingly is necessary..

With the Mi7, the amount of window space for changing pinions is relatively small, as you can't move the motor as much as you could on an Xray for example.

This is because we can easily change the spur to any size if necessary, which is what I really like about this car. Nothing worse than having to take over 20 mins to change a broken spur, which I hated doing on an xray.


As for spur gear I am currently using 104T 64 pitch.


Watch the video here

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Old 11-22-2019, 12:36 PM
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Originally Posted by MaxRain
Depends on how you have timing set on your motor, as power generated changes the torque curve when you adjust it.

Essentially you don't want to run out of RPM at the end of a straight, and gearing accordingly is necessary..

With the Mi7, the amount of window space for changing pinions is relatively small, as you can't move the motor as much as you could on an Xray for example.

This is because we can easily change the spur to any size if necessary, which is what I really like about this car. Nothing worse than having to take over 20 mins to change a broken spur, which I hated doing on an xray.


As for spur gear I am currently using 104T 64 pitch.


Watch the video here

Schumacher Mi7 testing
glad you moved that chair out of the way then your car wouldnt have flown off the track jk
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Old 11-23-2019, 07:42 AM
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Originally Posted by Marcos.J
glad you moved that chair out of the way then your car wouldnt have flown off the track jk
Lol, hahahaha, glad you noticed that...

For those who are interested, went head to head last night in TC stock. Ran the mid motor setup, against mid motor Amx car, Gizmo, VBC, T4's, and AE 7.2.
The first two rounds of qualifying, I ran a 21.5, then switched to 17.5 .
With the 21.5 I qualified 5th, but then switching to 17.5, I qualified 2nd.
Guys at the track were impressed, and I am back at the track tomorrow for more testing to see if I can gain a tenth or two.

If you have any questions, send away....

Q1 Schumacher Mi7 TC stock 21.5
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Old 11-23-2019, 08:10 AM
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Originally Posted by MaxRain
Depends on how you have timing set on your motor, as power generated changes the torque curve when you adjust it.

Essentially you don't want to run out of RPM at the end of a straight, and gearing accordingly is necessary..

With the Mi7, the amount of window space for changing pinions is relatively small, as you can't move the motor as much as you could on an Xray for example.

This is because we can easily change the spur to any size if necessary, which is what I really like about this car. Nothing worse than having to take over 20 mins to change a broken spur, which I hated doing on an xray.


As for spur gear I am currently using 104T 64 pitch.


Watch the video here

Schumacher Mi7 testing
on my Yokomo I also found that the space for shifting the motor was limited compared to running the car in rear motor form. However....changing the Spurs on the Medius kit is quicker than in rear motor form. Still love the features the MI7 has and I still have all my springs so staying with a traditional shock car would be better than switching to Awesomatix. Keep up the good work and have fun.

Robert K likes this.
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Old 12-01-2019, 02:23 AM
  #163  
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Since there are just five setup sheets on petitrc,can everyone share there set-ups. Not much info out there.
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Old 12-02-2019, 11:03 AM
  #164  
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Old 12-03-2019, 08:07 PM
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