>B-Mecha,
Hello. I do not think the sliding damper set will improve cornering speed, 'cause it will absorb impact in fact will slow down during cornering.

thanks for reply.

if want to improve cornering speed, should i maximize the front roller width and minimize the back roller width? i'm also thinking about what roller to use since there are a lot of options. which one are your favourite? (17mm, 19mm aluminium roller vs 9mm, 11mm, 13mm ball bearing roller?)

Nono, Sliding damper works by changing the direction of the car during cornering, thus improving speed. I have been using this part since I started competitively back in 97.

We know that if front roller width> rear roller width the car will be faster during cornering because the direction of the car is shifted away from the track wall and more towards the direction of the turn. This means the tendency for the car to push against the track wall during cornering is less, and energy is more efficiently used for turning.

Using sliding damper has 3 advantages:
1. Faster cornering speed: Sliding damper works on the above principle during cornering. In fact it helps in wave sections as well since it smoothens the rapid change in direction.

2. Best of both worlds: Because sliding damper only changes direction during a turn, you can maintain an equal roller width for front and rear on straights---> good for jumps and straight speed

3. Absorption: It can help absorb centrifugal force experience in a turn, making the car more stable.

Do note though for effect 1 it only works if you install the sliding damper at the rear. Putting it in front will have an opposite effect.

Do a small test and you'll see 

@B-mecha: The new part has a wider width so when you install 13mm rollers the roller width will be the maximum of 105mm. Also the material used is reinforced ABS so it is less prone to bending compared to the old sliding dampers.

my fav for speed will be a pair of 9mm at the front and 2 pairs of 19mm rollers with plastic ring

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Added on February 15, 2009, 1:13 am
bring your car to my track next week then we do test then we show the result here for other guys to understand and i will test my setup also to see how it compared to yours

Surething! Looking forward to it 

Now modding my chassis for tmr's race

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Added on February 15, 2009, 1:29 amBtw David, do you think it's good if we set a car that can be used for testing various effects next time? In this case we can have 2 cars, 1 car used as a control whilst the other is used to test various mods and effects.

no prob can be done i have many cars to test         

lol ok. I think stock is gd then we can limit the variables and get individual results of our testing more accurately. 

Surething! Looking forward to it 

Now modding my chassis for tmr's race

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Added on February 15, 2009, 1:29 amBtw David, do you think it's good if we set a car that can be used for testing various effects next time? In this case we can have 2 cars, 1 car used as a control whilst the other is used to test various mods and effects.

I hate mini-humps, I hate mini-humps. Hyper-dash took my SF to the moon, and torque tune showed us how to somersault a mini4wd (Yes, somersault). 

Even till the very last minute and the very last ticket, the scorching sun did not dampen our will to clear it. So close yet so far away. When we thought we'd be getting a new record, the 360 degrees loop+ hump hammered the very last nail to our determined but futile efforts. 

But what falls will rise again. As the night beckons our racing spirit resurrected and we fathomed the unthinkable---> using hyper-dash pro on fresh batteries to conquer the dreaded bridge lane change. 

And succeed we did.

After a day of scarred cover (yes, the mini-hump gave my SF a nice long souvenir), flying wheels and tyres, I have to say, it was a glorious day indeed. 

this is racing so where is the pics

Chill la boss, the pics are with Eelen. Give some time la 

Btw I am keeping the setting when I tested the hyper-dash so when we are at TU this week we can test again. 

I hate mini-humps, I hate mini-humps. Hyper-dash took my SF to the moon, and torque tune showed us how to somersault a mini4wd (Yes, somersault). 

Even till the very last minute and the very last ticket, the scorching sun did not dampen our will to clear it. So close yet so far away. When we thought we'd be getting a new record, the 360 degrees loop+ hump hammered the very last nail to our determined but futile efforts. 

But what falls will rise again. As the night beckons our racing spirit resurrected and we fathomed the unthinkable---> using hyper-dash pro on fresh batteries to conquer the dreaded bridge lane change. 

And succeed we did.

After a day of scarred cover (yes, the mini-hump gave my SF a nice long souvenir), flying wheels and tyres, I have to say, it was a glorious day indeed. 

Hello all, this my first post here.. Started playing tamiya 4 months ago and find it very interesting as it involves physics   . I know I have lots and lots to learn, hope you guys can help me   
Here's some qns Im pondering, maybe some pros can help answer and discuss too ^^

1) Rollers     -     Suppose you have the same car width regardless of which roller you use, which type of roller will be faster when turning?
    (5mm,7,9,11,13mm ball bearing rollers, 17,19mm aluminium rollers)

for me will 9mm at the front 19mm at the back but cornering speed will also be determined by the length of the car condition of the motor batteries condition of the rollers bearings and such roller placement also important.

2) Tires     -     For the tire width, why is it that most stock tires front width is smaller than the back? Will it be better if I were to use all tires of the same width?

yes it will be better for speed track but as for thechnical track tire width choise will differ depending on track layout car setup and type of car


3) Length of Car     -     What are both the pros and cons for having a longer or shorter car?

too long will slow down your car in the corner while too short will make your car unstable but give u better cornering speed so depend on u how u want to set the length

   
4) Track with jump after a corner     -     (Thought of this question in response to 13lack.12ose's guide few pages back)
Suppose the track is a turn, followed by a jump. My car did the tilt cornering for the corner, and enters the jump. As a result, the car enters the jump with a tilt and flies with a little tilt. (Any secret to help me achieve tilt cornering and yet achieve a straighter jump?  )

for this u will need to really observe the car while it is jumping then try diferent rollers or weight to control the car this will need quite a lot of track time for research . if u frequent tu u can just look for me and we see what can be done

Hope you all can    ar ^^ TIA.

long straight roads + mini humps + sharp cornering + 360 loop.... last night's race was a madness jumping track. with 6 tries i cant even finish half lap

all other racer's parts make me  i'll get more parts someday.

btw where is TU? ops.. nvm i found out it is tamiya underground in one utama

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Added on February 16, 2009, 11:39 am
ohh still waiting for the photos to be posted for yesterdays race , just by hearing this track i cant wait to go over to race maybe some guys here is interested can join also
u can get your parts from stargek in paya leber

Woow... Happy to hear that from u, david. When r u going there? I able to join in March. Need to ready some $$$$   .....

currently some parts at TU are insufficient....

now doing orders so no worries , so we wait for race date in march then we plan hahahaha my hand very itchy now

Thank you very much participation on yesterday race. Hot weather really, after in the sun for few hours I got sunburned. Thank you for my good friend queing on behalf for me, ppl who spare me some tickets at the last min. After the race, It was fun playing car at night, some cars body cover with the LED on.