what's this voltage regulator?
and if i don't mod this cheap car,then which car should i modify?
how much will it cost..
is there  any car that can hit 40kmph,has great acceleration...if yes,then how much will it cost?

You will just waste time and money modding a cheap car.I also think that only batteries are an option.Try a used car.

what's a voltage regulator??
if i don't mod this cheap car then,which car should i mod?
is there any car that can hit 40 kmph and has gr8 acceleration?
if yes,then how much will it cost in india?
NOTE : - I'm running low on money

You have to be aware of a reality in RC, especially in the context of India.  Any decent quality RC equipment still comes with an entry barrier in terms of price (in India)... that is one big reason why this hobby is still not that widespread in our country.

You are right.
moreover,our parents think that rc cars are just toys that are meant for kids.
when we grow up and want to have fun with rc cars again.....pleople laugh at us....
i don't think that it will cost anything less than 2500 rupees

Very true.. But I managed to convince my dad to buy a kit because it teaches me about various parts of the car like the diff., gears and stuff... (Mainly because he's an engineer)

Try to convince your parents to get you a nicer car... Take them to the track once and have them talk to the  people there...
2500 is slim.. You may be able to get an 18th scale car or a Mini Z.. Not too sure about them though

sorry to say but its a common perception that small cars are very cheap.
an 18th scale car will not be anyting less than $100
in my case i can explain you with Losi Remunitor/Remunition
its priced at $150 being a 16th scale car

do we get traxxas under 15k if yes let me know where to buy. i want to buy one.

amit

Wrong thread to ask this question.

Still, the price depends.. check www.traxxas.in

Hai Friend,its too easy to improve the performance of a "cheap car"..for this you must need some good knowledge in Electronics and Mechanics.we all consider many toys as "cheap toys" but my experience shows mostly not.i always collect possible scraped toys from homes and scrapyards,and most of them are too good for their value.i made many proportional servos with many toy gear boxes,some are too powerful in working. i used many such servos in sail boats to operate the sail.
to increase, ( to alter, more clearly), the performance of a toy grade rc car, you must consider the motor at first.all toy grade motors will be, mostly, based on 6 volts,DC, and in to 700 or 800 mA maximum.the driving circuits also will be based on these calculations.for example, the motor driving circuit of a 6 volts based toy car will be, mostly  based on 8050 and 8550 transistors.so the chosen battery pack also will be within 500 mA range by the manufacturer.in some toys we can see a 1, or 4.5 Ohms high watt resistor in power lines, to reduce the current to the main circuit in a motor stall.
in some good performance cars we can see some moderately powerful transistors like 882 pairs.but anyhow these circuits are intended for lower performance. and most of the toy grade RCs are based on RX 2B to RX 6B MCPs.

the RX 2B MCP is very versatile, and if you use a transistorized network to it, you can get proportional control,but need thorough knowledge in applied Electronics. any how our point of view is to increase the performance in an inexpensive way.so, any how we must consider the motor. most of the toy based motors will be less powerful,and brushed with flimsy brushes.what you have to do is, first of all, altering the brush.you can do it simply, by collecting a pair of starter motor brush set, of a Kinetic Honda scooter, or Honda Activa, or from any motor bike based on 12 volts battery electrics. open the back cover of the motor. so we will see the brush panels, with two flimsy fingers.then cut two tiny pieces from the brush set, of the starter motor, by an hacksaw blade, and grind it off up to the size, that fits the fingers of the intended motor.make a thin ridge at the back of the grinded piece, so, you can simply insert the piece in between the gaps of the real brush. if not, you can simply drill a simple hole to the fingers, and can fix the brush in place.

after checking for smooth operation, you can go for the next step.if you are willing to get a high performance, you can simply alter the main windings with new winding wires, according to your voltage, but make sure the plastic insulators will with stand the excess heat generated by the new windings.you can add high grade panels to the armature walls, so it will absorb excess heat to a great extent.motor winding is a painstaking proses, and it will take time , precision, and patience.its not necessary to alter the brush or winding if you are looking for a moderate performance.after correcting the motor, you can make a simple speed controller, based on PWM, is simple, can operate by a pulse generated by the TX, or can generate itself, in a preset mode, as the input voltage energized by the TX, on RX, then the input voltage triggers the PW Modulator,giving an instant start to the motor.you can use N channel and P channel MOSFET s, for rev and ffd.

and can use a weightless battery, can make at home, or can buy from any shop, or hobby shop, now is cheaper, you can find many reputed suppliers here in our reputed Forum.
here i am adding my "cheap toy car", is got from one of my friend, who is running a duty paid shop, in Thalassery town,and he always collect, and shifts damaged toys and stuffs for me.this car was put in a corner with waste, as it's battery pack dead.i gave him nothing, but he told me its price as 400/-Rs.i dismantled it at home, reworked on motor, for 7.2 volt specs,replaced motor bearings with brass bushes from walkman capstan bearing,brushes from scooter starter motor.added a PWM based motor controller.at 7.2 volts she is a real drifter..i spend nothing as extra ordinary..working on same TX and RX, same wheels, same steering mechanism,same differential,same body..nothing is removed,and hand painted with ordinary enamel paint.i hide this car from my son, Kundoo,because he cries in big mouth whenever he see this car..i an not much interested to spoil it's finish..as i like this car much.

you can see the simple motor controller inside here, i added this because the actual circuit will not with stand the current rating of the reworked motor.a simple addition..done..

at beginning i made a battery pack, at home by 3A batteries, and later replaced with LiPoly, in to 7.2 volts,for added running time.when i was completed this rework, the LiPoly batteries were expensive, but now its inexpensive than a battery pack of Ni Mh, in same rating.6 NiMh cells from a reputed company will cost 600X3 (600Rs for two), 1800/-Rs,but a LiPoly will less than 900/-Rs.so will work well..i will add a good video by tomorrow, revealing all internals,and performance..so you can see how simple it is to increase the performance of a toy grade rc car..

i am already working on a big car 2 feet long, got from same shop, paid Rs 200/-,and motor is removed for rework, in the specs of EP 400,already rewound, and replaced brushes,but must work on this. i will finish this as i get mood..

Roopesh, I can see a classic book peeping out. It is by Bill Gunston. Which one is it?

you can see the quality of the gear wheels used in this car..all it are nice and well engineered.the RX contains 4 relays to cope with high current rating of the can type motor.ample of space to accommodate heavy battery pack and PWM, speed controller with reverse.

Good morning VC Sir..its the "FIGHTER", by Bill Gunston,from Parragon books.some of my collections..

Good morning! I have "Bomber", "Soviet Air Power" and a few more of the same publisher, Blandford and others. Fantastic Author.

oh my God..Sir, you have a nice valuable collection of books..happy..its all rare..

Sumi,increasing the supply voltage isnt an option to increase the performance of your car.instead you can go for a powerful motor,in to the same size,or can fix powerful motor to the same setup. how..? its simple.remove the motor. remove the armature.take a bicycle spoke, and cut it in to the size,longer than your real armature length.replace the driving gear on to the spoke. so, you will get a little long end at the opposite side of the motor. you can simply fix a gear or pulley to fix a powerful motor to your vehicle.you can use a BLD with ESC, only if you have a professional radio set. if not, can use can type motors, and can make ESC s your own with simple circuits. an ESC with MOSFET can take load up to 120 amps and 260 amps all within a size of a match box to a cigar box.its all reliable and proven.can operate with the same setup with your existing TX and RX.if so, you will get fwd,rev, left,right, and horn,if your Tx is based on RX 2B.

you can also add headlights, brake lights, reverse lights,direction indicators all according to your imagination.as modellers giving up is not our option..all we are RC Indians..think big..dream big..will succeed..

Good Said and nicely  said.

I am also working in the same kind of improvement, that that is sure we can only improve power (if we consider less money), but cannot improve reliability in low budget (like 4WD, break etc)
I am not so much electronics guy, so plz correct me.

I got this car @ 600 Rs and after few days I damanged its circuit so it stops turning left, then I tryed to replace its battry with Lipo battry and belive me it start drifting in floor,

and tonight I just order new Tx and RX 20$ and ESC 8$ and will let you result soon...

Friends see my postings..  http://www.rcindia.org/cars/high-performance-super-drift-car-from-toy-car/new/#top

and video..

so please dont throw away your "cheap rc cars"..at lease you can give it to me..

Krishna,

Generally Rx circuits works in on-off mode and there is provision of turbo option in Tx2B chip.


But in Cars, same battery is used for receiver as well as power. and receiver ckt may be.



The main driving transistor replacing with BD139 and 140 set, you can easily increase the operating power of the driver.

But the transmitter works in switching mode. As you have not worked in Tx, then you must use, (reverse to forward and)speed up insted of forward and speed down ( with forward to reverse ) insted of reverse, like earlier.

But using that technic, stopping would not be problem ? Of course that can be achieved by using high frictional loss in gear assembly that increase/widen the stop zone , but that simultaniously reduce the power.

You can smartly use turbo with Vmotor = 50% duty cycle voltage and turbo will increase duty cycle. But you need an additional switch in Tx.

Thanks

Yes Kalyan..the manufactures of RX 2 the Silan electronics devices giving some options for conversion. but here our option is inexpensive and easy. so you can see in my video, instant motor starts and stops. in my experience BD 139 and 140 pair will hated up as the motor drops a high amps in drifting mode. so i prefer the MOSFET configuration. no headaches..works flawlessly.and nowadays MOSFETS costs less than a power transistor.so, inexpensive but excellent. and we can also wire our own Tx and Rx with handy components. so it will work greater than RX 2B. but it will take lots of time and efforts..