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Mini 4wd racing has been a hobby of mine just recently (August 2000).  I find it very absorbing with all the small tweaking on these miniature cars.  Consider it, my Lego.
 

~~ The Bastard Blade ~~

This is the first of them cars i bought in Filbars Megamall.  It is equipped with wide small-diameter wheels as you can see in the kit.  During the latest moments of its life, it lost its top fin because of the nasty crashes.  It never seen real competition because i had fun just running it on the tracks.  But I do take pride that it had great potentials.  Perhaps i'll re-set up this one for the hi-speed circuits only ...
 

modified Phantom Blade body
Super X-Chassis

1 Aluminum down-thrust
1 Aluminum rear plate
1 Rear brake set

2 9mm ball bearings for the front
2 13mm gold double rollers at the back

2 Narrow small-diameter one-way with narrow rubber wheels for the front
2 Narrow large-diameter one-way with narrow rubber wheels for the rear

2 Hollow axles
1 Hollow shaft
4 Hexagonal-hole bearings for the axles

4:1 Gear Ratio
Atomic Tuned Motor /
Hyper Dash 2 Motor
1.2v 1000mA Ni-Cd Batteries (National) /
1.2v 1600mA Ni-MH Batteries (Sanyo Twicell)

 

Mods.  The large diameter wheels on the back actually doesn't fit the Phantom Blade body.  So what happened is that i had to cut some portions off and then smoothen it with sandpaper.  And when the fin on top lost its hook, i made a vertical slit on top just so it won't look ugly without the fin.
     I placed the double ball race rollers on the middle hole at the rear plate and extended the screw on the outermost hole of the  brake set.

Performance.  I think it is light for its weight and did pretty well in a complex race track.  However, i have problems adjusting the breaks because the screw adjustment is covered by the rear plate.  It seems ok in zigzags because of the small over-all width with the front and rear rollers on the same level.  Power loss ain't noticeable in curves because the acceleration is handled well by the one-ways.  When i used the large-diameter lock nut wheels, it tends to really slow down in zigzags.  So i think it would be better if i use small diameter lock nuts instead.  
     This set-up had problems when landing from leaps as the tires on the rear really bounces half the time.  So one alternative was to use reston sponge.  But since there ain't any, i had to use those gray sponge tires that had low grip.  It also has problems dealing with long curves unless i place stabilizers.
     This set-up i think, could only do a little above average to poor in hi-speed and in technical.  If you don't have something to stick the one-ways to the axles, it might come off in hi-speeds.

 

~~ The Synchro Ravster ~~

This is my latest car.  I've been test running it and it will be using non-Tamiya parts.  This I will plan to run in competitions.  It has a funny looking set-up if you read on.  This one i plan to use in the complex and techinical circuits.
 
Synchro Master Z9 body
VS Chassis


4 Aluminum side extension for the front
1 Sliding damper (hard spring) with break set for the rear

2 19mm ball race rollers for the front
4 13mm ball bearings for the rear

2 Very wide small-diameter one-way with wide rubber wheels for the front
2 Wide small-diameter one-way with narrow rubber wheels for the rear

4 Hexagonal-hole bearings for the axles

5:1 gear ratio
Atomic Tuned Motor /
Hyper Dash 2 Motor
1.2v 1000mA Ni-Cd Batteries (National) /
1.2v 1600mA Ni-MH Batteries (Sanyo Twicell)
 

Mods.  I modified two of the front side extensions by bending it forward.  That way, it will function as my 'down-thrust'.
     Placed in front also are the other two side extensions under the modified side ex and will act as supporters.  I was thinking if i should use the frp plate instead, but the complexity of the bent side ex forced me to use such.  Note however, i didn't use the normal set-up holes for side extensions.  Instead, i used the two middle holes in front for mounting and used the third hole from the outer edge of the side ex for the other.  Last time when i used spacers to raise the front rollers, the side extensions bent badly from a crash.  So this set-up should be more durable.

Performance .  As you can see from the set up, my car looks like a tadpole with the VERy wide one ways in front.  At first i used that at the rear and it didn't do very well with the evil leaps.  The reason i had the wide tires is because there ain't no good supply of narrow ones here.  I took my chances with other brands last time and i found out that at times it's not functioning as one way because the pinion gears inside gets stuck.  Figure it out with those imitation brands.  Anyway, it had some advantage.  When landing from nasty leaps, the extra width that wasn't covered by the tires spares the front rollers from pain.  And because it is rotating, the car moves back to the course that much faster.  It seems to have more balance too.  Combined with the 5:1 gear, acceleration is no problem.
     But like i said, it looks really funny.

 
Quick Links
The Horde.net
Tamiya Mini4wd Catalog
Tamiya Manila

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Who is Quentin Montejo ?? © copyright 1999 by Francis del Mundo.  Some materials here are not of the author's property and therefore rightfully belonging to their respective owners.  Now quit reading this line and surf !