Bit Dra-G Mods

[tinyrc]

What mods have people done for drag racing? Has anyone done anything to reduce steering travel in the front wheels and improve the straight line? What about weight and friction reduction?

[payaso]

I have a Supra set up for drag racing. It's not totally modified, except for a 3.8 motor, tight gold plated springs(a must for dragging), super soft razor cut tires, and a stubb for a antenna. With 3 consecutive charges this car smokes. I race it in the tennis courts behind my apartments. It's too perfect, cause the pavement is perfectly smooth with a sandpaper finish, and the lines are already marked...

[TheFanMan]

very nice, what did you use for the grill on the front?

[payaso]

The grill is made from SS screen from the faucet. When I put in the water filter it hit me like a brick, that the screen is way more useful in my car than in some 'ol stupid faucet...LOL
Works great..

silla

[tinyrc]

Very nice! Could you describe what you did to the tires? What kind of times are you getting with it? What cell are you using?

[DrkRAM]

I with Tiny on the tires? What dod you use for "super soft razor cut tires"?

[payaso]

For the tires, first I found the softest tires, which came on a mini movers clone. I don't know why that is, but they are really flimsy. Second, I sanded the tires down with course sanpaper on a piece of wood. This leaves the tires with a very soft worn grippy feel, and last but not least, I put a series of small cuts in the tires. These cuts are done at an angle, and in the shape of an X. Making the cuts this way does make a difference in performance. The car will still peel out in reverse, which is the way I want it, but when you floor it, there is no slip at all. The cuts will flex and grip..

I still run a stock batt. for one reason, and that is I know if I upgrade all my batts before they're used I'll never downgrade to them later, and they'll never get used, so I might as well use em first. I still don't have any times yet, but I'm guessin that they are around 5.00-6.00 sec.

I'll keep you guys posted... The tire in this pic is very worn and grippy. You can see where the tires flex by the little pieces missing

silla

[tinyrc]

Cool mod. Has anyone tried soaking tires in traction compound or similar to create a softer tire?

[AleroStarfire]

Softening compound might work. In my race car we used a paint thinner called Tolluene (sp?). It does a nice job after a few hours of soaking but super soft ties shred fast.
My old RC 1/10 scale car had foam tires and they were amazing.

4 wheel drive would be the ultimate for drag traction though :)

[BaY oN AiM]

HMMM...........

i modded my bcg for drag but then i put it back to its original state.....

the only thing i did was make it so it couldnt turn.......

first u take out the sway bar.....

then add springs that are long so that they are very stiff.......

by doin so u make it so hard for the knucles to turn that it doesnt......

therefore your bcg can only go forward......

[BaY oN AiM]

one thing i have to say............i have gone back to DRAG........

i have a lowered front(springs) heightened rear(tires) 2.6 motor wit dual NiMH batts. wheelie bar and roll cage

rear tires - i went to the hardware store and saw some rubber washers for plumming or sumthing...they fitted on the axles but it touched the body....so i remove the rims and gear and made a longer axle.....so now i have a wide rear with wide tires.....o yeah they have really good traction and u can tread them n e way u want cuz theyre thick.....

roll cage - i took some paperclips and started to straighten them out.....then i bent them perfectly so that they fit onto the chassis snugly....the i bent some more to make like a dome cage and front bumper.......

[tinyrc]

Cool, got a pic of the tires?

[BaY oN AiM]

ill get some pics as soon as i get some batteries for the camera.........

[QFM Racing]

I always assumed that a lowered front end was better for dragging...

Someone mentioned using longer length springs in front to get stiff resistance to steering. What a great idea! I never thought of that, though I know it really does work, but doesnt it raise your front end? Wont that affect your performance? I guess you could lower your body up front to block air from rushing under, and create a pseudo-airdam.

My drag Bit has the lowered spring mod, because I always thought a lowered front end was the way to go. But this does nothing for my steering, and when my car drifts on a drag run, trying to correct the steering by tapping left or right will send it WAY OFF the straightaway line.

Hmmm... how to get the best of both worlds?



PS the wheelie bar is the best way to go if dragging with a 2.4v mod. Try to get it as low to the ground as possible, because popping off the start line with a 2.4v & a 3.8 Pink Slip Rotor will send the car wheelieing, and when the front end eventually touches again, you may not be aligned to the track anymore and its hard to correct steering from that point on. I am racing on a 12 inch wide lane (Official BitDra-G guidelines).

[BaY oN AiM]

http://www.picturetrail.com/gallery/view?p=999&gid=1187308&uid=706519&members=1

[tinyrc]

BaY oN AiM, love that rear wide stance! Cool!

[jets]

Originally posted by BaY oN AiM
i have a lowered front(springs) heightened rear(tires) 2.6 motor wit dual NiMH batts.

how long to you charge your batteries for? do you wheelie alot?

[BaY oN AiM]

i removed the second battery...the wheelies cause to lift the front wheels off the ground thus i cant turn...

Modified controller: 3-4 minutes

Home made Stand alone 3 cell charger: 3 minutes

Home made plug in charger 3V: 2-3 minutes

[QFM Racing]

Keep your wheelie bar low to solve the issue...

If your wheelie bar is low, once you wheelie, the bar will hit the ground, and bounce the car back onto its front tires quickly. This effectively solves the issue for straight line drags, BUT if you use the car on courses with many turns, or other than a standard oval and straight line, this will NOT fix your problems, because everytime you accelerate on turns and out of turns, the wheelie-ing will just send your car into the wall/barriers. The wheelie bar is really a BitDra-G mod.

FYI: ZipZaps fit 2 cells completely underneath the PCB, with only one modification (cutting out the latch area for charging port docking lock). The centered weight of the dual cells, negates the wheelie effect. There is a dual cell Bit mod that fits both cells beneath the PCB, but requires ALOT of chassis modification. The original cell is moved back and will actually sit over the rear axle well, allowing for more space for the second cell to fit (follow?). The finished product however hides the cells completely beneath the PCB with no cells exposed. Definitely advanced mod.

[JaMeZzZ122]

i'm workin on the dual battery mod now...whats the best gearing ad tire combo for bcg draging?

[BaY oN AiM]

i would say the teal gear and the softest tires u can find....

[blacksabbath070]

i believe the best gearing to use, that is if you are racing on 22 foot long track, would be 8.25:1 because although it doesnt accelerate as fast it reaches a higher top speed and to use soft tires

[BaY oN AiM]

hahhahaha...

i beat u at replyin by a split second....

lol....

that was funny......

[blacksabbath070]

DANG IT!!! hahahha oh well same reply you could have jsut siad that i thoguht of this too this would have saved me time

[BabyKiller]

k i have my 3:43:1 gears,r-spec,duel(mabey tri)cells on the way mabey if i can get 4 blue leds with a on/off switch(save power)i will mount each led in a corner or close to 1 under the body for a bottom and window glow effect its gonna kick ass and if i figer out how im gonna drop my car 2

[met-sb]

a nice mod would probably be to replace the magnet with a circle of metal that way when u try to steer back in it goes slow and it doesnt get sent right of the track also i think it would work cuz the electromagnets atract metal to

[dustn]

I use kit racer front plastic whees/tires on the front spindles. I believe that they came from the RPM, MPH/KPH, and, I think, the ENERGI versions of KIT racers. They reduce rolling friction and steering. The steering is just enough to make the car easy to keep on line. By the way KIT racers are 3.88 clearance at my local Target.

[MythosGR]

One useful and easy mod is to use the pullback rear wheels!
They are wider and slightly smaller,for better acceleration and for 6-7 bucks you get another cool body and even front wheels if you want!
Plus some rims designs are kick ass!
just my 2 cents

[RC_EVERYTHING]

Heres my drag car. I did the 2-cell mod and made the chassie about 1/2" longer so wheelies aren't a problem.The best part is now I can use slot car bodies on it with a little modifying.

[RC_EVERYTHING]

here's one with the body off

[~Bit+Racer+3~]

A 2 engine, 4wd, Quad Cell mod would kick @$$ for BitDra-G. No steering, no wheelies. Perfecto!