12-31-1969, 04:00 PM

R/C Tech Forums Expert How-Tos and Guides

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USGT

12-31-1969, 04:00 PM

R/C Tech Forums Expert How-Tos and Guides

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05-13-2022 | 11:18 PM

#11221

Xrayray

Tech Regular

Joined: Apr 2019

Posts: 472

Quote:

Originally Posted by Robio

What is a good starting FDR for the Gravity Spec motor. Running it for the first time on Parking Lot Asphalt. Fairly open track layout with 80-90' Backstraight.
Rob...

Rob, is it for Santee? Try gearing up a half point and maybe keep going up. Topher may have a better answer for you tho...

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05-14-2022 | 06:58 AM

#11222

bertrandsv87

Tech Champion

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Joined: Feb 2011

Posts: 8,404

2.9fdr to 3.10 fdr on 100ft straight tracks, depending on infield smoothness....

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05-14-2022 | 09:13 AM

#11223

Robio

Tech Regular

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Posts: 496

From: San Diego, CA

Prefect. Thanks. I searched the thread and couldn't find much info. I know gearing is subjective but ballpark helps. I'm new to 21.5
Yes Ray, for Santee. Will you make it down?

05-15-2022 | 09:24 AM

#11224

Xrayray

Tech Regular

Joined: Apr 2019

Posts: 472

Quote:

Originally Posted by Robio

Prefect. Thanks. I searched the thread and couldn't find much info. I know gearing is subjective but ballpark helps. I'm new to 21.5
Yes Ray, for Santee. Will you make it down?

I am currently in 2 builds, might be a little bit before I can. I will be in 17.5 soon.

05-15-2022 | 11:53 AM

#11225

Sabin

Tech Master

iTrader: (1)

Joined: Jun 2007

Posts: 1,627

Quote:

Originally Posted by theproffesor

Sent a message to Paul to get the lowdown on the new rims. The old wheel is 7mm from face of wheel to hex, new wheel is 6.7. That’s it’s. It is only .3mm difference.

When can we expect to see the new rims/tyres?

05-15-2022 | 09:06 PM

#11226

theproffesor

Tech Elite

iTrader: (74)

Joined: Feb 2005

Posts: 3,864

From: Lugoff SC

Quote:

Originally Posted by Sabin

When can we expect to see the new rims/tyres?

They are already out and what is available on his site. They are the 6 spoke rims.

05-16-2022 | 08:12 AM

#11227

glennhl

Tech Elite

iTrader: (16)

Joined: Sep 2013

Posts: 2,351

From: Arizona

Quote:

Originally Posted by theproffesor

They are already out and what is available on his site. They are the 6 spoke rims.

Yes, the last 4 sets of USGT tires I've bought have been the new 6 spoke rims. However, even though the new belted tires showed up at a national race recently they are not available to the public. I'm guessing Paul wants to use up his supply of non belted tires first to keep the hobby shops from having to eat a bunch of inventory.

Last edited by glennhl; 05-16-2022 at 12:09 PM.

05-16-2022 | 08:34 AM

#11228

Dan

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Posts: 6,961

Will the non belted tires be completely phased out?

05-16-2022 | 09:42 AM

#11229

mrreet2001

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iTrader: (9)

Joined: Apr 2009

Posts: 2,044

From: NW Ohio

Quote:

Originally Posted by glennhl

Yes, the last 4 sets of USGT tires I've bought have been the new 6 spoke rims. However, even thought the new belted tires showed up at a national race recently they are not available to the public. I'm guessing Paul wants to use up his supply of non belted tires first to keep the hobby shops from having to eat a bunch of inventory.

Quote:

Originally Posted by Dan

Will the non belted tires be completely phased out?

I could be wrong, but as I understand it there were supply chain issues and Paul couldn't get enough of the regular tires for the event.

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05-16-2022 | 10:40 AM

#11230

Sabin

Tech Master

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Posts: 1,627

Quote:

Originally Posted by theproffesor

They are already out and what is available on his site. They are the 6 spoke rims.

What's the website? There's a lot going on here so it's hard to keep up.

05-16-2022 | 11:03 AM

#11231

mrreet2001

R/C Tech Elite Member

iTrader: (9)

Joined: Apr 2009

Posts: 2,044

From: NW Ohio

Quote:

Originally Posted by Sabin

What's the website? There's a lot going on here so it's hard to keep up.

https://www.teamgravityrc.com

05-16-2022 | 11:20 AM

#11232

Sabin

Tech Master

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Joined: Jun 2007

Posts: 1,627

Quote:

Originally Posted by mrreet2001

https://www.teamgravityrc.com

Ah! okay. I suspected that was the one but I wasn't sure.

05-20-2022 | 05:29 PM

#11233

Robio

Tech Regular

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Posts: 496

From: San Diego, CA

Went with the gearing advice I was given this past weekend. Started at 3.8, went down to 3.4. Temps were fine considering ambient was high 80's. Track temp around 120*ish. Couldn't get out of everyone's way fast enough! It wasn't horrible in the infield, but down the straight, which was shortened to about 50-60', it was laughable. Guess I could've gone lower on the fdr, but didn't seem worth the time to swap out the spur, as the pinion I used was large as I could go.
Am I missing something, or is that about all I'm gonna get out of the Spec motor?
On a positive note, the new chassis was fantastic!

05-20-2022 | 07:17 PM

#11234

Xrayray

Tech Regular

Joined: Apr 2019

Posts: 472

Quote:

Originally Posted by Robio

Rob, I could a told you it's weak and only good against other spec motors. I have a Motiv MC4 21.5 Dyno tuned if you want to try it out.

05-20-2022 | 08:09 PM

#11235

Robio

Tech Regular

iTrader: (6)

Joined: Jul 2009

Posts: 496

From: San Diego, CA

Quote:

Originally Posted by Xrayray

Rob, I could a told you it's weak and only good against other spec motors. I have a Motiv MC4 21.5 Dyno tuned if you want to try it out.

Haha! Thats what I figured. No worries. the motor came with the car I got, so no great loss.
I appreciate the offer Ray. I have a new TCR 21.5 coming...