Robb's 1:6 Nascar Build Log

[Robb]

Plan:
-1:6th Scale Nascar (+/- 34" long, 12" wide)
-Rear solid axle (Twin Force)
-Front IFS (E-Maxx, non-widemaxx w/ driveshafts for brake)
-Chassis, all tube...................no "true" rect frame
-Engine, old leftover weedeater somewhere around 23-25cc (tentative)
-Transmission, probably won't fit, so none planned so far
-Tires, 5" slicks


First "organized" tubing I have done, and so far, well worth the effort to plan it out!!! More used to bending by hand, and "sighting" joints, but with a couple of hours of table prep, going the organized route is definitely the way to go! Got the base frame set, and next step is to tack it. Then "lift" the chassis up to ride height, block it, and build the rest from that. Nice to know that everything is going together level and plumb.

[2JSC]

damn - this should be good!

[Shaun]

Sweet, this will be one cool build, I wanna see more.

[JasonInAugusta]

Have you worked out the diff for the front end?

If I remember right, the Maxx and TF have different diff ratios.

You'll need the diff for braking.

[Robb]

Originally Posted by JasonInAugusta

Have you worked out the diff for the front end?
If I remember right, the Maxx and TF have different diff ratios.

The front won't be driven in any form. The car will be a purely RWD car.

The point of the Maxx front w/ shafts is to bring the front drive to a single point to brake. The exact way of front braking the single shaft is unknown at this point (and I am open to suggestions). The original plan was to be able to brake the rear axle also, so to leave the ability to rear wheel brake, front wheel brake, or full wheel brake................but this will be dependent on the rear drive, which is unknown at this point.

For driving, I would like the ability to adjust braking..................but just for the show and go, I REALLY want the ability to brake just the front. Since the 2-cycle takes a bit to wind up, I want the ability to power-brake the bastard!

[JasonInAugusta]

Ok then.

Take the brake hex assembly from a T-maxx and put it on the input pinion to the maxx diff.

You'll have to make a mount for the pads to attach but that shouldn't be too bad.

Run d-shafts from the diff to the wheels and blammo...front brakes.

If you have the radio for it you can mix the front/rear brakes then turn the mix off and just operate the front when you want to light up the rears.

Quick thoughts in my head.

[microgoat]

Or go all scale-like with a brake at each wheel, cable-operated.

[Thorsteenster]

That might be worth the effort with loosing the drag created by the front driveshafts and R&P.

[Power_Wagon]

what if you use a one-way bearing reversed, so it free wheels in forward but will transfer braking power to the front when you try to stop?
or like microgoat said you could do it like 1:5 cars do and have wheel mounted brakes. you could even make it all from nitro brakes, use cables, and adjust the brake bias that way

[Shaun]

Have a look around here. Those would be pretty cool.

http://www.nitrotek.co.uk/XRC1.htm

[Robb]

I found out that even with the "narrow maxx" arms, the front will be about 1" too wide, so I have to get rid of the front pumpkin. I will probably end up running FG 1:5 cable discs in the front.................but figuring out brakes is quite a ways down the road.


Mocked up the first draft of the rear end today..............

[Shaun]

Did you think about using a pocketbike motor? I think you might be happier if it would fit ok. Considering the aftermarket for a 47cc cag engine is crazy.


My bike pulls 1250rpm loaded and 1360 unloaded. Of course I've put some money into my engine and a tone of time messing with port timing and what not.

[Rudukai13]

Do you think your gonna run the front brakes on a seperate control from the rear? That way you could do some sweet burnouts.

[Robb]

Originally Posted by shaun

Did you think about using a pocketbike motor? I think you might be happier if it would fit ok. Considering the aftermarket for a 47cc cag engine is crazy.

47cc may just be a tad excessive for a 20lb car...........and too big. I am planning out the cage so that with that engine stripped down to how it is there, I can just barely wiggle it out. And I am trying to make this a "zero sum" project (what I put in it, I need to sell stuff to make up for), so cost is a big concern here. That engine came from my old weed eater, so it is a freebie.

And yes, front and rear brakes would be controlled separately .................although there really isn't any plan for rear brakes right now.

[Shaun]

That sounds good, perfectly understandable. Do you plan on making a should to go around the fly wheel and blow air on the head?