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Old 01-15-2010, 01:21 PM   #7801
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Mr. Kennedy FTW!

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Old 01-15-2010, 01:50 PM   #7802
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Originally Posted by Solara View Post

I didn't know the driver had to have a HANS Device also.
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Old 01-15-2010, 02:44 PM   #7803
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I didn't know the driver had to have a HANS Device also.
Safety is USVTA #1 concern...apparently.
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Old 01-16-2010, 11:24 AM   #7804
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For those VTA guys looking for a great race next weekend, try the VTA class at the Hurricain series race held at Trackside in Brookfield, WI, a suburb of Milwaukee.

http://www.rctech.net/forum/wisconsi...et-series.html

I pretty certain RobK will be in attendance. Come and see if you can run with him after his Novak win last weekend.
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and I guess the TA-05 IFS-R is pretty good too.....
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Old 01-16-2010, 06:08 PM   #7805
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I have looked and can't seem to find the info
How do I find out what FDR is for a JRXS and a TC3
I found the excell link but I can't get it to open
I just need the drive ratio for the cars and the formula to figure our FDR
I will have 21.5 lipo in almost all my cars
Thanks
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Old 01-16-2010, 06:42 PM   #7806
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Quote:
Originally Posted by promatchracer View Post
I have looked and can't seem to find the info
How do I find out what FDR is for a JRXS and a TC3
I found the excell link but I can't get it to open
I just need the drive ratio for the cars and the formula to figure our FDR
I will have 21.5 lipo in almost all my cars
Thanks
JRXS internal ratio 1.83 : 1
With a min gear ratio spec of 4.2, you may run with a spur/pinion ratio of 2.295 or higher.

TC3 internal ratio 2.50 : 1
With a min gear ratio spec of 4.2, you may run with a spur/pinion ratio of 1.680 or higher.

Thanks Scott, fixed it.....
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and I guess the TA-05 IFS-R is pretty good too.....

Last edited by 414MPH; 01-17-2010 at 06:11 PM.
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Old 01-16-2010, 06:54 PM   #7807
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Quote:
Originally Posted by promatchracer View Post
I have looked and can't seem to find the info
How do I find out what FDR is for a JRXS and a TC3
I found the excell link but I can't get it to open
I just need the drive ratio for the cars and the formula to figure our FDR
I will have 21.5 lipo in almost all my cars
Thanks
The TC3 has an internal ratio of 2.5:1

Your formula is FDR = (spur divided by pinion) times internal ratio.

an easy way to figure is to take your known spur gear and your known max FDR. If, for example, you have a 100T spur in your TC3 (what mine always seem to have) and you enter the max FDR as 4.2:

4.2 = (100 / pinion) X 2.5 = 100 X 2.5 / pinion

4.2 X pinion = 100 X 2.5

pinion = 100 X 2.5 / 4.2

Which gives a whopping 59.52 tooth pinion. As with any of these, the 60 tooth pinion would not be legal (too low net FDR), the 59 tooth would be the largest legal. Not that it would actually fit the TC3. Strikes me I installed a 78-ish tooth spur in my TC4 when I was testing the 1s / 13.5 combo. To get anything down to 4.2 in the TC3 will require you to do a little gentle Dremel work on the webbing in the chassis below the pinion. Only takes a couple minutes.

Gearchart.com says the Losi JRXS has an internal ratio of 1.83. Figure this the same way, but your selection of spur sizes is limited on the Losi cars.
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Old 01-16-2010, 06:56 PM   #7808
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Quote:
Originally Posted by 414MPH View Post
JRXS internal ratio 1.83 : 1
With a min gear ratio spec of 4.2, you may run with a spur/pinion ratio of 1.680 or higher.

TC3 internal ratio 2.50 : 1
With a min gear ratio spec of 4.2, you may run with a spur/pinion ratio of 2.295 or higher.
Thanks So if I have a 128 spur I am going to have to change it
I am running on carpet oval with about 125' drive line 66X33 is the deminsions
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Old 01-16-2010, 06:59 PM   #7809
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Originally Posted by promatchracer View Post
Thanks So if I have a 128 spur I am going to have to change it
I am running on carpet oval with about 125' drive line 66X33 is the deminsions
Depends, can you get a 51 tooth (51.41) pinion matched up with that big spur. What happens is you start running into max teeth problems which gets solved going to smaller spurs and pinions to net the same ratio.
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Old 01-16-2010, 07:09 PM   #7810
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I have the PRS spur gear adapter so I can go real low I just don't have my gears with me right know So I think I am good on the JRXS
Now I just have to try and come close on the TC3
This will be the first time we are running them
I just want to get them up and going because I have a Big race coming upi in April called the Spring Fling and it will be the 10th Annual one and I wan tot make it Big and am Hoping to get a good group of VTA cars up here for it
It is on April 24th and 25th
here is a Link http://www.hobbytalk.com/bbs1/showthread.php?p=3126704

Thanks for the help too guys
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Old 01-16-2010, 07:10 PM   #7811
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Quote:
Originally Posted by 414MPH View Post
JRXS internal ratio 1.83 : 1
With a min gear ratio spec of 4.2, you may run with a spur/pinion ratio of 1.680 or higher.

TC3 internal ratio 2.50 : 1
With a min gear ratio spec of 4.2, you may run with a spur/pinion ratio of 2.295 or higher.
Marty has inadvertanly transposed the numbers when he typed out what he had calculated.

The JRX can run a minimum 2.295 spur/pinion ratio.

The TC3 can run a minimum 1.680 spur/pinion ratio.
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Old 01-16-2010, 07:12 PM   #7812
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Got it
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Old 01-16-2010, 08:00 PM   #7813
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Thumbs up In need of AE TC5 vta set up

Hi All
Can anyone post a vta setup for a AE TC5 ,Im running 21.5/lipo or even a thread to one.track is med to large ,changes almost every week were I race and has med to high bit carpet.
Thanks in advance`
Matt
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Old 01-16-2010, 08:15 PM   #7814
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Quote:
Originally Posted by Scottrik View Post
The TC3 has an internal ratio of 2.5:1

Your formula is FDR = (spur divided by pinion) times internal ratio.

an easy way to figure is to take your known spur gear and your known max FDR. If, for example, you have a 100T spur in your TC3 (what mine always seem to have) and you enter the max FDR as 4.2:

4.2 = (100 / pinion) X 2.5 = 100 X 2.5 / pinion

4.2 X pinion = 100 X 2.5

pinion = 100 X 2.5 / 4.2

Which gives a whopping 59.52 tooth pinion. As with any of these, the 60 tooth pinion would not be legal (too low net FDR), the 59 tooth would be the largest legal. Not that it would actually fit the TC3. Strikes me I installed a 78-ish tooth spur in my TC4 when I was testing the 1s / 13.5 combo. To get anything down to 4.2 in the TC3 will require you to do a little gentle Dremel work on the webbing in the chassis below the pinion. Only takes a couple minutes.

Gearchart.com says the Losi JRXS has an internal ratio of 1.83. Figure this the same way, but your selection of spur sizes is limited on the Losi cars.
I just wanted to know if all of that was in your head or if you had to refer to your notes. Thats scary if you knew all of that without even looking at your notes.
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Old 01-16-2010, 08:27 PM   #7815
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Quote:
Originally Posted by blackdog View Post
Hi All
Can anyone post a vta setup for a AE TC5 ,Im running 21.5/lipo or even a thread to one.track is med to large ,changes almost every week were I race and has med to high bit carpet.
Thanks in advance`
Matt
Go to Associated's site and the setups should be under "downloads". I use one of Josh Hoenstein's rubber tire setups which was VERY close out of the box. A few very small adjustments and I like it very much.

We change our track most races too (historically) which means you want a car that's got a GREAT base setup that can take a couple minor tweaks. If you change that regularly you won't find the "set to kill" setup.
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