azrhcp84

I am thinking about selling my electric tc3 project that was for speed, and trying out a nitro... I have not been in nitro for 6-7 years now.... anwyays... what would it take for a Ntc3 to reach 80MPH could it be done with really steep gearing, and a decent motor?

GYNAIKAS

Probably a big block engine with long gearing...it's heavy so .12 engines won't be able to push it to 80mph..

azrhcp84

do they make big block conversions? Right now I have a brushless tc3 and was hoping for the speeds, but everything to me cost alot more money with my expensive 5s lipo than a nitro would...

ttoks

weight has no bearing on top speed, only torque to the wheels, aerodynamic and mechanical drag have any bearing on top speed, weight just dictates how long it takes to get there.

Foxy

Indeed. With an 18tz engine (most powerful small block engine you can get), and the largest pinions and smallest spur gears you can get for that car, you'd be on your way, stick a nice aero body on it, like the Proline DNA and you should be approaching 70-75. To go faster than that, with electric or nitro, you're looking at serious investments and custom parts (think gearing).

GYNAIKAS

That's what i mean...they wont be able to push it to 80mph before the car gets out of range.

azrhcp84

hmmm what about a big block conversion? and yes I have already dumped about 500 into my electric tc3, and I know it will be close.. but I am wanting to try to get some money back and try a nitro electric is starting to be a pain... dealing with heat. charging batteries. lipo care ect...

GYNAIKAS

I've seen many big block conversions around here...try the "outlaw engines" thread here or the "miami" thread!

azrhcp84

ok thanks!! everyone convinced me to stay away form nitro so I spent mega money on electric and yah its cool.. but if you ask me its just as big of a pain in the ass as nitro lol... maybe worse...

GYNAIKAS

I feel you bro...!!! Even charging the radio batteries is a pain in the ***** for me!!! LOL

ferrarimk13

hell yeah, in my buggy its like a 20 minute job changine the batteries in it, because of all the wires, almost as much as an electric, lol

2000XLT

BIG BLOCK?? in a ntc3... I have a extra XTM 24.7, I thought about doing that, but i ASSumed it would not work, but if it did, I mean come on,,,it made a 13 pound truck go 50 MPH!!

GYNAIKAS

Come on!!! Where are the miami guys when someone needs them??? Please enlight us gys!

Suprachrgd82

Shooting for that kind of speed is where every detail counts. It not about simply buying the big motor. You will need to do things that will give you accelertion and handling because of the speed, also.

Basic guidelines:

Power-you will need a motor with lots of power, but more so, RPM. You can't go fast at 18,000 rpm. Look for upwards of 32,000.

Weight-lightening the car will get the car to speed faster, and give slightly more top speed.

Balance-vibration is drag, and will slow you down.

Suspension-if you can't control it, your gonna either wreck it or go slow. You will need stability and traction

Gearing-you have to go really high. For the NTC3, you will need custom gears.

Aerodynancs-the most important at those speeds. You need good downforce, and no drag. (Lola body)

For all practical purposes, the expediture of this project will be very high. The total $ you sink into it will not be returned in resale. Nore importantly, it will be equivalent to cars that will give you these speeds fron the factory. Among the big dogs of cars of this caliber are Picco integra, Mugen MRX, Kyosho Evaolva, and HPI Proceed.

GYNAIKAS

Well evolva reaches its top speed in about 3 seconds...as MRX also does. Picco and proceed are slower but close to them. Such a car could easily cost over $1500+ with all its equipment. Way more than the electric project...

azrhcp84

wow lol... well I wast hinking os .21 with custom gearing and a awsome body.. I dont think id honestly have that much into it.... Since I have a good friend who is an engineer and can make anything I need for practially nothing..

azrhcp84

also.. does anyone know a speec calculator for nitro that I can use to figure out what motor,rpm/gearing I will need for the speed I want to achieve

azrhcp84

and also the diff ratios thanks

Anthoop

Erm sorry...not that it has any real bearing but how old are you exactly??Just as a matter of personal interest really.
If you give me your maximum motor rpm and overall gear ratio and wheel diameter i'll be able to calculate your maximum theorectical speed.

azrhcp84

I can calculate it my self just fine... and why does my age matter? how old are you? I asked the diff ratio so I could calculate it?

Anthoop

Your age does not in any way matter,it's just that as you seemed quite indecisive to your actions i presumed you to be fairly young and wished to know!
I'm 37!

azrhcp84

no im not young.. I just like to try it all..... only way to be the jack of all trades right? doing the same thing over and over gets boring... maybe its just me...

GYNAIKAS

I can make one calculator in matlab script very easily. But unless you have matlab installed you wont be able to run it. Well there's an easier way of measuring the overall ratio. Mark a dot on the clutchbell and one on any of the car's wheels. Roll the car till the wheels makes exactly one full turn (roll all the car NOT only the wheel you marked cause inner differential gear interaction may chage the results) and count how many rounds did the clutchbell turn exactly. The overall transmission ratio is Tr = wheel turns / clutchbell turns = 1 / clutchbell turns. Then multiply that number (Tr) with the engine's theoritical rpms (it would be good if you multiplied it with 0.95 to concider a 5% clutch and slide losses) to find the maximum wheel turns PER MINUTE (!) (let's name it Wt). Wt = Rpm * Tr * 0.95.
Now it's time to find the distance that wheel runs during 1 turn. We set R the wheel radius so the distance is D=2*pi*R. So the overal distance per minute is Dpm=D*Wt. If you convert that number into km/h you have the maximum theoritical speed of your car.

azrhcp84

also does anyone know if a nitro tc3 chassis will bolt onto a electric tc3? using everything from the electric?

GYNAIKAS

I don't know if that is possible but generally this doesnt work on most of the cars.