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Originally posted by AMGRacer I am new to 12th scale racing and I wonder if the experts could answer some questions for me. It seems to me that under acceleration in a 12th scale there is little weight transfer to the rear unlike in a touring car. Am I right? It does appear that the rear pod will flex downwards some, but the middle shock (I have a rc12l3) appears to control the rear wheels contact with the ground due to bumps in the track more so than affecting rearwards weight transfer under acceleration? Also what is an "average" ride height setting for a 1/12th scale? In gas sedan racing you usually want your foam tires to be as low profile (side wall) as possible. Is it similar in 12th scale where you use smaller sidewall tires on higher grip surfaces? Lastly, is there any good online reference material for 1/12th scale tuning? 1/12th scale car setup depends on the surface you are racing on. General rule of thumb is that the less traction the racing surface is providing, the higher the center of gravity (CG) and or the roll center (RC) needs to be. If you are racing on carpet, which provides the optimum in traction, the lower the CR and RC needs to be. This prevents traction rolling. As you move to racing outdoors or on asphalt, then you need to start raising your CG and RC to provide better traction on less than optimum surfaces. The RC can be and most often should be, different from the front of the car to the rear of the car. Changing the RC on a pan car can be difficult due to a lack of adjustability of the suspension but there are ways to improve mechanical grip. EXAMPLE: If you have an over steer condition under acceleration, which is most often the case on 1/12th cars, you need to increase the RC on the rear of the car or decrease the RC on the front of the car. As I mentioned, due to the minimal ability to adjust the suspension on the rear of a pan car, there are several things you can do. 1. Use a softer compound (durometer) rear tire. 2. Increase the diameter of the rear tire. This in effect raises the rear CG. 3. Use a firmer compound front tire. 4. Decrease the diameter of the front tire. This lowers the front CG. 5. Decrease the thickness of the T bar if you are running a T bar style car. 6. Add cut outs or holes in the T bar to increase flexibility. (Be careful! The T bar is the most fragile part of the pan car suspension.) 7. Remove the center bolt from the middle of the T bar where it attaches to the motor plate. 8. Use lighter weight oil in the center shock. 9. Use a lighter spring on the center shock. 10. Use a stiffer spring on the front kingpins. 11. Increase the toe in on the front of the car. 12. Apply a traction additive to the rear tires but not the front tires. All of these things or a combination of these things will increase the mechanical grip on the rear of a pan car which will help to eliminate an over steer condition. Joel Johnson grew up racing at our local tracks in the San Francisco Bay Area. I remember one time when the track conditions were so bad that after trying just about everything to increase the traction on the rear of his 1/12th car, he ended up putting layers of tape over the battery slots so the batteries would not set down in the slots. This raised the CG on his car providing more weight transfer which increased his rear grip! Battery slots in pan car chassis were added to lower the CG for carpet racing. As it turns out, there are many options to increase the grip on a pan car. Not like there is on a touring car, but enough to make a pan car a most enjoyable and satisfying class. Go over and talk to the person who is putting in the fasted lap times and ask him or her what set up they are using remembering that their set up may only get you close. The same holds true for any setup you get off of the internet. Understanding your driving style/abilities and the track conditions is paramount in setting up your any car, scale racing or 1:1 racing. The key thing to remember is – it must be fun!! Thanks heaps guys. |
i get loads of oversteer.
I am running pruple front, grey rear. Front tires are worn and thge grey rears are huge (new tires untrued) I also put compund just on the rear tires. What front toe in, out do you guys run? I have like 2 or 3 degree to in on both sides because i can't shorten the turnbuckles any more. Any ideas? |
desslok,
Who are you calling for parts? Talked with the Team CRC guys Friday.... I mentioned I saw this on the Tech board.... they have all the parts you listed in stock. Give them a ring or e-mail. Also, someone mentioned that the CRC wheels weigh to much.... hhhmmm, CRC tires and wheels can't be too heavy to win at the most competitive stock races in the world. The results speak for themselves; 1-2 in stock at the Indoor Champs in Cleveland and 1-2 at the 2004 ROAR Nats. |
Originally posted by Super Steve i get loads of oversteer. I am running pruple front, grey rear. Front tires are worn and thge grey rears are huge (new tires untrued) I also put compund just on the rear tires. What front toe in, out do you guys run? I have like 2 or 3 degree to in on both sides because i can't shorten the turnbuckles any more. Any ideas? |
parts.
I just tryed to order over the web all the parts were listed as unavailable.
I will try again it's been a few days.. ok just checked on there website.. they still show that the parts are un available. I am useing there web order page and when I look at the cart with my requested items the web form states that there not available. should I order by phone ? |
im acquiring a 12l3 in a trade soon and i plan on racing it-ive ran tc3 a couple times on the track is there anything i should kno before racing the L3?? what foam combination should i use, running on a med/hi grip carpet, pretty technical? and also where can i find set-ups? should i ask guys at the track?
-thanks -ryaN- |
Originally posted by rdub202 im acquiring a 12l3 in a trade soon and i plan on racing it-ive ran tc3 a couple times on the track is there anything i should kno before racing the L3?? what foam combination should i use, running on a med/hi grip carpet, pretty technical? and also where can i find set-ups? should i ask guys at the track? -thanks -ryaN- Just remember to take it real slow at first as a 1/12 is a lot less forgiving than a TC. I should be there this Thursday doing some testing. Just look for the guy in the PRC shirt. I will be there from 11 am til close. |
ya i will be running it at larrys
-im getting greens with the kit but i will pick up purples and grays --also what about servo? not expensive but not cheap ---ESC also? same as above i will not be there thursday it wont be ready by then i might not even have it then but ill keep in touch-do u race fridays? -r |
I race only in the winter. I just like to test new stuff during the summer.
For a good servo thats cheap I love the Airtronics 94145. I have been using the same one for a long time without a problem. As far as the ecs goes the LRP quantum Sport without reverse is good for the price but I would spend a little extra and get a Quantum 2 or a VFS2000. I prefer the VFS myself, but The Q2 is just as fast and much easier to use. |
well that was a little more than i expected to pay but ya gotaa do what u gotta do right?
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desslok,
I just went to their site to check out the situation.... The "none available" shown in the list under the heading "Image" means that there is no picture or image available of the part, NOT that the part is not available. This simply means that there is no picture for the part on the site. Give them a call or e-mail, or just send in the web order. I bet they have your stuff and you'll get your order quick. |
I feel so silly.
oh man I cant believe that I did that..:weird: I dont know why I just did not read the screen better.
I think this qualifies as a Doh.. moment. |
Cobra
Get some PINK rears. You will love them in low traction asphault. Greys are for carpet.
Larger tire diamater makes for better traction due to more flex in the side walls. Try em you will see. David Root |
Cobra--If you still slide with pink rears get blue. They will wear faster but the car will stick.
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anybody trading 1/12?
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