please give me ideas on this .21 4tec

[need4speed]

today i start my project .21 4-tec i got it stripped down to about nothing and cant decide if i want to go rear wheel only funny car style with some fat rear slicks or just keep it 4 wheel drive, any ideas im open to.
I will be posting pics of this project also.first pic of progress so far http://albums.photopoint.com/j/View?u=1472064&a=11140722&p=39910152



[This message has been edited by need4speed (edited 02-03-2001).]

[Rodbr]

It's just my thoughts but why don't you keep it 4WD and make it handle. Think about this, when you nail the gas breaking all 4 tires loose during take-off.

[This message has been edited by Rodbr (edited 02-02-2001).]

[need4speed]

well i got the 2 speed gears on that 3.5cc which was no easy task, had to cut the crank shaft(easy) but then had to grind down the back of the nut that goes on the shaft so the clutch would fit right, not easy to keep it square so my flywheel doesnt have wobble,but i got the gears on there and just look at the difference in carb sizes,(i set the stock motor next to it)to see difference
http://albums.photopoint.com/j/View?u=1472064&a=11140722&p=39963697

just as i posted this i realized i became a rc racer!!100 posts, what timing,how cool

[This message has been edited by need4speed (edited 02-03-2001).]

[RC Rick]

Wow, that looks awesome man! I'm glad you have the aluminum pulleys too, b/c if the belt shreds, it will wear the pulley down a little. Also, since that is a .21, its going to be hard on those gears, so you may want to get a better gear ratio if its to high. Also, you will have to turn the carb 180degress, and also turn the throttle servo around 180degrees b/c it has the slide carb. BTW, what kind of engine mounts did you use? Did you have to make any chassis mods?

good luck with the big block!

- Rick -

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2000 GOLD COBRA MUSTANG KICKS!

[Dan]

I think you should definatly keep the car four wheel drive because with the added weight and horsepower of the big-block you will need the traction around the corners.

[RC Rick]

Another advantage of having 4-wheel drive is better acceleration. The more rubber you have on the road with power, the more accel. Also, if you are just doing some little drag bashing lines, you may actually add a little weight to the rear. I was watching Junkyard Wars a few weeks ago with the drag racers, and one of them had a V8 engine and they added weights to the rear of their car. They did it by making a pole that went straight up and they put weights on the pole. You could do something similar maybe. I added a pound brick to the back of mine with some hanger wire and it really acceled fast!

Some other things you will want to thing of is that this is going to put a lot of stress on the driveline components. So I would recommend tensioning up all of your belts, and using aluminum pulleys, witch it looks like you already have the 20t ones. You will need the huge 1/8 scale tires if you can find out how to mount them to the axle. Keep in mind that a lot of HP is useless if you can't put it on the ground.

I can't wait to see your car when its done, be sure to post some pics!

Best of luck to ya!

- Rick -

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2000 GOLD COBRA MUSTANG KICKS!

[Ferrari]

Hey i have done this warning keep the stock gear raito becaus if you don't you will put to much stress on the beltsespecially th rear one where most of the power is going to. the set your gear mesh just alittle closer but make sure the gear spin freely. and you don't need to flip the car ad don't just bend a rod an connect with there it might take awhile to get i right but it will work out just right. becaure ful when doing power take off's and just keeps four-wheel drive. i have a novorossi R1 in mine and love it set the rear diff alittle loose. to keep tension off the belts. and get foams for tires you'll be throwig rubber like crazy......

tip time... get hpi supernito rims and RUBBER tires for it and you will get super bottom and top end. then get a novorossi header for it and cut anout 1/4 an inch of the header to bring the rpm' colser and this will give better bottom end.....

final thought get some stick on wheel waits to keep it on the ground. and also becareful about boddy selection.

oh yeh P.S........ run your engne really rich for nomall running..i mean not for 'bogging down rich' bu tun it for racing the back out the highend needle 1/2 t 3/4 a turn and low end keep at racing you want to keep it rich because ou'll already blow any .12-.15 off the road with an rich engine so yourengine will run cooler and longer and faster then every .12-.15

[Subaru]

<font face="Verdana, Arial" size="2">Originally posted by Ferrari:
Hey i have done this warning keep the stock gear raito becaus if you don't you will put to much stress on the beltsespecially th rear one where most of the power is going to. the set your gear mesh just alittle closer but make sure the gear spin freely. and you don't need to flip the car ad don't just bend a rod an connect with there it might take awhile to get i right but it will work out just right. becaure ful when doing power take off's and just keeps four-wheel drive. i have a novorossi R1 in mine and love it set the rear diff alittle loose. to keep tension off the belts. and get foams for tires you'll be throwig rubber like crazy......

tip time... get hpi supernito rims and RUBBER tires for it and you will get super bottom and top end. then get a novorossi header for it and cut anout 1/4 an inch of the header to bring the rpm' colser and this will give better bottom end.....

final thought get some stick on wheel waits to keep it on the ground. and also becareful about boddy selection.

oh yeh P.S........ run your engne really rich for nomall running..i mean not for 'bogging down rich' bu tun it for racing the back out the highend needle 1/2 t 3/4 a turn and low end keep at racing you want to keep it rich because ou'll already blow any .12-.15 off the road with an rich engine so yourengine will run cooler and longer and faster then every .12-.15</font>

your info is wrong... power is spread to all 4 wheels evenly. running wheel weights will make the car vibrate and is capable of ripping itself apart. and what is this rod you are talking about... the conecting rod? if that is bent it must be replaced. Also is that a torq .21 engine from duratrax?


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My Nitro Sport gets squirly at wot

[need4speed]

i think ferrari meant the linkage to the carb
(dont flip the car b)i did turn it 180* just because the paths seem to be alot smoother for the linkage, I spent most of my day cleaning the rear end bit by bit,also i added a bearing where there was a plastic spacer on the inside pulley rear,I dont think it will matter all that much but better than a plastic spacer that was worn.new oil in shocks, cleaned all bearings and new oil,just made it spotless really. yah the torg engine is whats on there.All i really had to do was drill the chassis, i still need to reinforce that area where it sits though.ill just add a little alum to it. http://albums.photopoint.com/j/View?u=1472064&a=11140722&p=40077757

[sudden impact]

what motor mount did you use?

[Ferrari]

um sorry i was in a rush i meant bend the throttle rod for my last post. and subaru you are WRONG call traxxas and ask them what belt get the most power transfer and the'll tell you. why do uou think the rear end has an anjustable belt tensinor. it because the rear end get's the most power and also the front diff don't have a belt tensior. so it was a traxxas rep how told me this and i read it some where on this site . dude your going to love the .21 conversion

[need4speed]

well i have it mounted and supported and the motor mounts are the stock mounts from my nitro quake that came with the truck, it is the engine off of it also, seems to be a pretty good engine,it was turning some 7 inch tall tires on that nitro quake and had no problems for power,almost too much power for it.i cant imagine what this car is gonna be like.

[Subaru]

ferrai: how do you explain the shims. they tensionize the middle and front belt. The guy you spoke to at traxxas must not have known what he/she was talking about... The front end as well as the rear end will get equal power other wise the tires or other driveline component will be destroyed unless it is allowed to slip. In that case you might as well just have a 2wd vehicle since the other wheels arn't doing any thing.

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My Nitro Sport gets squirly at wot

[Ferrari]

you know what i am a grown-up adult so you know what how cares

[need4speed]

well today i went to my lhs and got some of the fattest tires that could fit on it, pro-line road hawgs 3 in rear and hawgs 1 in the front, they look like aqua treads, they are taller(2.0) and much wider.i just got the gas tank to fit in, i had to cut one of the motor mounts down a bit.i doing this project here not only because of my need4speed but to show everyone just what is really involved in the project so they can have a reference to go by. ferrari- i would love to see a pic of your car with the .21 if possible,on setting up the rear end i did tighten the belt 1 notch to avoid any slippage. in theory yes all the belts take the same stresses, in physics we know that there are many factors other then power output involved, on take off the majority of the weight shifts to the rear wheels which could lift the front wheels off the ground completely if enough energy is present allowing the front tires to spin freely while the rears take all of the resistence,thus straining the rear belt more so then the front or middle.i am not out to say who is right or who is wrong, its not about that, its about facts and finding them together so we all can learn more.i started with nikko man and i wish i had you guys to help me back then.so thanks for all your input, i greatly appreciate all of it.And today i chose a body for it,it is definatly cast from the coolest car ever made,i will reveal this uncommon body as soon as its ready,ill post a pic of the tires tommorrow.

[Les]

Hello Louis --cough-- I mean Mr. Ferrari -- cough --
May I post some pics of your digital Super charged, nitrous injected 4-Tec??
Like I have said. You Cant Mess With The Les..
For the Shag Nasty Racing Group has contacts..
Good Day
Les



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excuse me while I pass some gas

[need4speed]

well heres a pic of the tires it'll be sportin.to make it faster to open because of all the photos on this page ill start a new topic called .21 4- tec continued..........
http://albums.photopoint.com/j/View?u=1472064&a=11140722&p=40282946

[RC REDNECK]

i think this car will match your name need4speed,that is one bag as- look'n car. is that think going to race,or just kicking buttay!

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THESE THING ARE TO MUCH FUN YA'LL!

[Ferrari]

Yeh it looks cool

[SuperMuncher]

.... I want one. Looks good! Do you have a radar gun available? i cant wait to see some pics of it flying

[1st Gear]

Hello all.Im 25 and put in a big block in my n-4tec alooong time ago I put in a OS RX.15 and it lights up all four all the time,One thing the biggest thing your doing wrong if you keep it 4 wheel drive is the tire difference.You dont want to use two different size tires.It will slow your overall handling and speed.Arent those buggy tires on the front??Ditch the truck tires.I tried the truck tires on mine awhile back and the car is way over geared for those tires even with your .21.This car isnt geared for big tires it is geared for small ones keep that in mind.Dont waist your time with 1/8th scale tires cause their to tall too.just because your runnnin a .21 doesnt mean you can and have to run 1/8th scale tires.Ferrari is right!!!if you buy anything else make sure you get a new belt or belts cause if you dont you can bet your a-- you will later,Set your front and rear belts up so they have about 2to3mm of flex anything else will wear out very quickly.Keep the carb facing the front just spin the servo around so you can set-up the linkage.I am amazed you got those mounts to work I used the big block kit from Brukner hobbys for HPI and did some mods but it works great,May recommend a body??Hpi Cougar or the 300m from proto form they both cut thru the air great,Very lil drag.they both make the car handle GREAT!!Man I cant wait til I get a digital cameraP.S. Get some bearings in the bell cranks!!!

[This message has been edited by 1st Gear (edited 02-07-2001).]

[RC Rick]

I have a question. Where did you get those blue anodized CVD yolks. The yolkes for my CVDs are just black.

- Rick -

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2000 GOLD COBRA MUSTANG KICKS!

[need4speed]

RC RICK I was wondering when someone would notice that!! The yolks are mip's one thing ive found is that the pactra rc265 metallic blue paint is an exact color match for the dark blue on the chassis. so yah im busted!! cheating, but it looks good,
1st gear- i have a body already picked out(in one of the last posts),also the tires are only 2.0 instead of the 2.2s so just a bit taller then stock 1.9s
but there both the same height so there wont be any binding in that way.i would love to see Any pics of big block conversions on a 4 tec,and thanks all so much for the great input, all very helpful.

[burningrubber]

that thing is sweet man

[ViperMaxx]

Wow, that thing would fly, literally! Nice! I was wondering, could you use a t-maxx type .21 conversion kit? then modify it to fit correctly? It would sit higher but would work, i think

[RC Rick]

I might have to use some of that metalic blue paint! OK, another question, did those 1/8 scale tires bolt right on to your regular axles w/o mods? Also, how are you going to route the header? It would have to make it around the tire, but how? Unless you can find one thats really simple that goes down then to the left. Most ones I see for rear exhaust go down to the right, then turn around to the left, but with those the tire would be in the way.

Also, how much more does your car weigh?

- Rick -

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2000 GOLD COBRA MUSTANG KICKS!

[need4speed]

Rc Rick- the tires did bolt right on,i had to use the plastic hex spacers in the rear which gives a little less bite on the rim but i ran it like that with wider then stock tires before in rear wheel drive only and was doing punishing burn outs until i snapped the rear belt and there was no problem with the rims.it would kick sideways a bit when it hit second, was pretty nice.
im running the exhaust header now and theres no chance of going over the tire to the rear as much as id like that so im trying to cram it into the side area where it was originally. i have to fit it under the body which is pretty tight.so as soon as i get it ill make a new topic area for faster loading and ill put up more pics. thanks man.

[RC Rick]

Be sure to give us info on accleration, and top speed!! Also, consider trying to race against some 1/8 scales if there is a 1/8 track near. That would be awesome if a Nitro 4-TEC beat, say, a Serpent!

- Rick -

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2000 GOLD COBRA MUSTANG KICKS!

[RC Rick]

I forgot to say, you can gear the second gear for more top end. Remember you have a very powerful engine alowing you to have more top speed. I also suggest you get some aluminum sus. arms from Powerline, because the stock ones will be flexing! And, if you can, modify the left chassis stiffener so you can have it in there. I noticed it was missing, and thats not good, because the powerful engine will flex the chassis and mess it up. Thats why Serpent and Mugen 1/8 scale onroads have 5mm think chassis. I would also suggest making your own stiffeners for other parts of the chassis that has nothing on it. Like, the spot under the radio tray, and the little channel under the bellcranks. You can buy a sheet of graphite on EBay for like 5 dollars, and all you need to cut it is a jig saw with a really fine blade. And you may just make your own left chassis stiffener to replace the stock one using graphite. These are the types of things where any ideas can be useful, so keep on dreamin!

- Rick -

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2000 GOLD COBRA MUSTANG KICKS!

[1st Gear]

You could double up the chassis to stiffen it up ,Guys do it on their HPI nitro MT's.Arent those 1/10th scale truck rims/tires on the back that you used?And not 1/8th scale.


[This message has been edited by 1st Gear (edited 02-09-2001).]

[need4speed]

ttt

[hpikiller]

add some higher tension springs on your shocks. I am running tc3 springs on my 4 tec, 22lb front and 17lb rear. The car just hugs the corners especially with the sway bar kit.

[kcrunch racer x]

hey speed cant wait till it all dressed up keep us posted man that is one hot 4tec.

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crash "N" burn
"worx for me"