Brent Davis

I used red loctite before and it actually stripped some threads before so now I use the blue which is less forgiving.

Now tell me about that .28 motor. Is it a high revving mill that is more powerful than a .21? How much are they and are they very popular today? What is the fastest that you know of one of those .28 motors? What is your goal with yours?

I never knew that the diffs used to go out at races. That is interesting to know that I wasn't going crazy myself.

nitrohead5300

Nothing special about this motor it is a stock LRP .28 imported here by associated. Just giving the chassis a shake down to see how well it can handle some power. My objective is to turn my Nitro TC-3 into a high speed oval racer like Nascar

nitrohead5300

A company I think it was IRS made metal pinion gears which were suppose to take care of that problem , some people believe that more attention should be paid to shimming the diff .

nitrohead5300

Brent here is another picture showing how I plan on doing my exhaust

Brent Davis

The only problem I see with that is your throttle servo and battery may be an issue. I definately looked at doing mine that way too but those things were in the way. Looking good though. Is that the TC3 that you showed me a while back with the 1/8th scale tires on it?

masfirme2

GJ with the NTC3, looks really cool. I have an HPI Proceed 1/8th scale and that weighs 4.5lbs

nitrohead5300

...............................This is not the exact setup I am planing on using, my pipe will be a tuned boat pipe and if I have too I will lay the throttle servo down to get the clearance and use either a flat battery pack or lipo's so I can get the clearance. Always more than one way to skin a cat!!

Brent Davis

Now that is what I like, MAKE IT WORK NO MATTER WHAT.

Got a question though. I set my rear toe with the car standing up vertically to 2*, is that correct or should I go less/more? I don't have my factory manual to tell me what the toe is with the car vertical.

ferrarimk13

hey nitro, the LRP is going into the NTC3? crazy!

nitrohead5300

..................Yes it is just stock if it proves to be too much I will put a modified 21 or 18 in .

nitrohead5300

......................2 degrees is the recommended factory setting for rear toe end .

Brent Davis

Thanks nitro. I wasn't sure of what the setting was but knew that it was not to be at zero.

phenix_racing

4 lbs a little heavy but it all came from that massive .21 bigblock engine. my RS4 2 weighs almost 2. but on the other hand my hpi savage weighs like 10 or 15lbs. big difference huh?

in the picture its my rs4 2 and my savage is in the backround

ferrarimk13

yeah, thats what i was thinking about, the RS4 2 is about 2 lbs, so i thought it would be around the same.

nitrohead5300

Wow that is light.

Brent Davis

Well the .21 is running great BUT I will now have a new solid aluminum AND a solid steel driveshaft built for the car. The stock original and TC3 upgrade shafts wobble very bad under full throttle and is now causing the front tires to shake again. I found out by tightening the car down on rollers with resistance and saw the shaft vibrating BAD and the stock ones are hollow aluminum anyways.

I also have been busy rebuilding the old TC3 that crashed pretty hard last year and it now uses a fully ported Traxxas 3.3 with a V shaped crank, fully ported sleeve, RB mods rod which is 7 grams lighter than the stock Traxxas one and a cut down head. I fabbed up a big block header and Fusion pipe just like I did for the RB .21 and so far the motor sounds great and seems like it is going to run pretty good. This car will use the same Mugen 1/8th scale tires as well and right now I am just waiting for the Wolfe Pack Radicals 1/10th scale to 1/8th scale wheel adapters to come in. More to come with both cars as I am trying to get them finished before spring time along with painted bodies.

ferrarimk13

what motor is in that thing?! that head is crazy looking! i like it

Brent Davis

It's a Traxxas 3.3 with 4 fins cut off and I also painted the head flat black. It has been modded by RBmods.net with a lighter rod and the crank is cut to pieces and back with a RB Concepts .23 8mm carburetor too since it fits directly down into the 3.3 block.

ferrarimk13

ahh, i was going to say it looks like the bottome half of a 3.3, lol. good idea. That manifold looks like it was a pain in the ***** to fit in there.

nitrohead5300

Brent is your TC-3 with the traxxas 3.3 motor in it going to become your parking lot road racer??

Brent Davis

Well I will say that the last 3.3 motor that I had from RBmods ran 77 MPH in a 4-tec with:
a. 60% nitro
b. stock 3.3 carb
c. the crank was heavier
d. the stock head was taller and a tad heavier with all fins

RBmods new 3.3 that I have I am hoping to run faster than the 77 and in a TC3.
a. 60% nitro again
b. larger than stock 8mm carburetor
c. lighter crankshaft than the last crank
d. plus the TC3 has less driveline drag. It free rolls very good whereas the 4-tec would stop without using the brakes sometimes.

The new 3.3 revs very quick like my .21 does and adding this big block header and muffler will help too.

BTW, the pipe and header was just like my .21 header/muffler that I made up. Look at the TC3 on the stand and you'll see the same header/muffler system. Easy stuff to fab up and I am really enjoying doing so. I now have to cut the dogbones down to 1.550" so that I can use the Mugen wheel/tires on this one too.

ferrarimk13

wow, dont expect some life out of those engines with 60% lol.

Brent Davis

LOL. It is only for speed runs and I've yet to break one. Keep it tuned and you SHOULD be fine, at least I have been so far.

ferrarimk13

yeah, i guess, must be getting good performance out of it with that fuel. sounds like you should get over 77 but what gearing are you using, and be careful not to overheat with the half head.

nitrohead5300

Hey Brent , Ziggy's V-1RRR is looking wilder, and wilder!! I don't know if I am going to use a boat pipe now on my Nitro-TC3 it is tooo long and if you flip the car I don't know how well the pipe is going to take it. Anyway here is a picture of where I am at on my project.