R/C Tech Forums

R/C Tech Forums (https://www.rctech.net/forum/)
-   Electric On-Road (https://www.rctech.net/forum/electric-road-2/)
-   -   1/12 forum (https://www.rctech.net/forum/electric-road/37-1-12-forum.html)

azmio 01-22-2006 04:26 AM

matt

thank god there is someone out there who I can talk to about Velocity brushless in a 1/12.

Here are few questions that I need to know: -
1) Do you run your GTB fan with 4 cells

2) Is the top end speed good on a large track?

3) What the gear ratio that you're running for large track?

I am now running my 1/12 with 5 cells and 5.5 BL. Unfortunately my L3 chassis is now damaged and I need to switch back to my L4 chassis. I am concern that with 4 cells, i wont be able to keep up with nitro cars.

mpetrich 01-22-2006 06:42 AM


Originally Posted by azmio
matt

thank god there is someone out there who I can talk to about Velocity brushless in a 1/12.

Here are few questions that I need to know: -
1) Do you run your GTB fan with 4 cells

2) Is the top end speed good on a large track?

3) What the gear ratio that you're running for large track?

I am now running my 1/12 with 5 cells and 5.5 BL. Unfortunately my L3 chassis is now damaged and I need to switch back to my L4 chassis. I am concern that with 4 cells, i wont be able to keep up with nitro cars.

1. Yep, works just fine. The only issue I had was that you need to make sure that the ESC is mounted RIGHT next to the center shock mount. You have to get the fan to fit right under the middle hump in your body. It is tight, but it works.
2 and 3. I am not sure of the MPH, but the car is really moving. I am running Fusion IB3800 cells and each is rated a little over 1.20v's. I think the cells really help. I have been working on the correct gearing over the last week or so. Right now, I am running a 96 spur, a 24 pinion with 45mm diameter rear tires. The roll out is really low but the car is working well but I could probably use some more tweaking here.

I am using the Nomadio radio so I can measure motor temps and battery volatge and both have been absolutely fine. No chance of thermalling at this point.

Finally, did you see that Novak just released the 4.5 Velociti. That must be sick!

Hope that helps. Let me know if you have other questions.
Thanks,
Matt

Still Bill 01-22-2006 08:24 AM


Originally Posted by {VIC_RDX}
hey all,

can anyone tell me where i can find a roll out guide

thanks

Go to www.gearchart.com created by Harsh. You can tailor charts to your make of car and gearing needs.

Use the second function for roll out.

Bill

JayBee 01-22-2006 09:35 AM

For the nut that's on the rear axle do I need a 11/32" nut driver?

B-B 01-22-2006 11:08 AM

Jay Bee, yes 11-32th on my L4, same on all I think.Bill

JayBee 01-22-2006 11:09 AM

Thanks Big Bill...

azmio 01-22-2006 05:25 PM

matt

here in malaysia, track temperature can be as high as 54 degree celcius. Thermal shutdown is common.

Even with fan and short gear ratio (100/19) for my pan car, the ESC still experience thermal shutdown.

The latest mod that i did to my car was in providing some opening above the GTB fan. I cut my bodyshell and flexed the cut portion up to make it works as a scoop.

mpetrich 01-22-2006 06:22 PM


Originally Posted by azmio
matt

here in malaysia, track temperature can be as high as 54 degree celcius. Thermal shutdown is common.

Even with fan and short gear ratio (100/19) for my pan car, the ESC still experience thermal shutdown.

The latest mod that i did to my car was in providing some opening above the GTB fan. I cut my bodyshell and flexed the cut portion up to make it works as a scoop.

Let me know if the scoop helps. It would be good to know. Most of our 1/12th scale racing here in the Midwest is indoors so even in the summer, outside temp is not an issue.

I wonder if you could put a bigger capicitor on the ESC? I don't know how much bigger you could go, but maybe that would help keeping the ESC temps down a bit.
Matt

mpetrich 01-22-2006 06:23 PM


Originally Posted by azmio
matt

here in malaysia, track temperature can be as high as 54 degree celcius. Thermal shutdown is common.

Even with fan and short gear ratio (100/19) for my pan car, the ESC still experience thermal shutdown.

The latest mod that i did to my car was in providing some opening above the GTB fan. I cut my bodyshell and flexed the cut portion up to make it works as a scoop.

Let me know if the scoop helps. It would be good to know. Most of our 1/12th scale racing here in the Midwest is indoors so even in the summer, outside temp is not an issue.

I wonder if you could put a bigger capacitor on the ESC? I don't know how much bigger you could go, but maybe that would help keeping the ESC temps down a bit.
Matt

Dustinkeys 01-22-2006 06:31 PM

I'm new to onroad and just picked up a yokomo 1/12. What is the best body for this car and where can I find a good setup. Thanks in advance.

gmintimidator 01-22-2006 07:07 PM

I picked up a used RC12L this afternoon for $40 and it included 2 speedos (410 MXC and a Jem) and a Futaba 132H servo, all in working condition. I am not sure how old it is though :D I have a box kicking around from an RC12LW. It looks similar except that the one I picked up has a shock like the newer cars, but still has the old front end.

Any ideas what this is? I can get a pic.

Also, what tires are guys running? I am hoping to get this thing race ready for next weekend, a fellow racer gave me a complete rear axle for an L3 so I have the hubs for the tires. Is Jaco the only way to go or?

Thanks

Scottrik 01-22-2006 08:46 PM

The "original" RC12L dates to the mid-eighties ('87?). The shock was the same big fat gold-bodied shock that was on the front of the gold tub RC10s. The "old" front is the same as you see used now on some cars almost 20 years later. Same for the dampener disks.

I've still got a 410MXc and Futaba 132SH servo from my RC10L pan car. Pretty sure they were ca: 1990, maybe 1989.

Scottrik

purpurite 01-22-2006 08:49 PM

I don't recall a gold full size shock on a 12L at any time. There was one on the 10L... the only shock I remember on the early cars were the length of fuel tubing on the threaded rod with the dampner plates.


I think the first actual shock on a 12L was a VCS. I'm sure there are people here with better memories than mine who can assist... Ike, you out there?


doug

gmintimidator 01-22-2006 09:10 PM

This shock is a VCS macro one.

Scottrik 01-22-2006 09:46 PM

My mistake--I'd forgotten all about the fuel tubing, wire and collars. MY RC12L has a humongous gold shock on it and I sure didn't recall "updating" it though I must have as I built it new. Just to be certain I grabbed the instruction manual(s) (glossy booklet w/pics, matte booklet with written instructions) and there's nary a mention of a "shock" in there.

Gotta love those "two pieces of wire and a collar" tie rods too. Ralphy Burch and Jay Halsey look like kids in their pics in the back of the book. Then again, they WERE kids. That RC500 is darn nearly as big as Ralph. What ever became of Tony Neisinger?

Scottrik


All times are GMT -7. It is currently 04:00 AM.

Powered By: vBulletin v3.9.3.9 Patch Level 3
Copyright © 2026 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.