NTC3 with .12 vs .15

[Diver6127]

Coming back into this hobby, i was steered towards the NTC3 and I loved it! I bought the kit and isntalled the os CVRX .12 with pull start. Car worked and ran great. I never had any probs with the car or the engine. I have approximately 1 1/4 gallon through the engine and it's still running great, especially after retuning it.

My brother recently purchased an OS cvr .15 for me NonPull start for only $97. I have yet to have the engine in my possesion but that's not the prob. He said that the shaft would have to be cut to fit since it's a standard length vs sg .Not a prob according to him since he did the same thing with his CVRX 15. My question is, how much of a difference in length is the shaft? I most probably will do it myself with a high speed cutting tool. If not, I'll take it to my lhs. I just want to make sure.

Next question:

I know my NTC3 is pretty fast already, how much faster will it be with the new engine? I'm already spinning my tires with the .12 (I can hear it mostly in the mid range when I goose it). All my gears are stock. Will I have to compensate with higher ratios to keep from stripping the gears or spinning my tires even more?

I tore through the tires that came with the kit and replaced them with HPI X-pattern treads. I loved em since I mostly bash at an asphalt school playground or a very large parking lot near by. How will these treads hold up to more power? What do you suggest I use with this higher torque engine?

I'm not realy into racing. I just enjoy running the car, especially after work to relieve the stress.

All your suggestions would be appreciated. Thanks in advance!:write:

 

[nitromaniac]

I have a 15cvr-x in my tc3, after switching out the stock 12 I really didnt notice much of a difference in top end until I started experimenting with different pinion gears, cutting the shaft was a piece of cake,you will need to get the cut off bolt from your lhs and a dremmel and your set! If your 12 had a rotary carb on it, and your 15 has a slide carb, you will notice a bigger difference in off the line speed as well, I will be switching my rotary to a slide carb, its the only thing I dont like about my .15 a friend has the same set up as me but with a slide carb, the thing tears away from my car everytime,the os15cv-rx is a great motor but I would definitley recomend the slide carb, its just more responsive, you will have to modify your throttle linkage a little but well worth it!
good luck!

 

[Diver6127]

Thanks for the input. It really helps.

Since this is my first non pull motor, I am in the market for one. I am considering either an OFNA or Associated ... both being for both 1/8 and 1/10. What are the pros & cons of these manufacturers?

 

[nofx]

OFNA = quantity, ofna is a good manufacturer if you need any parts espeicialy for OFNA go to www.nitrohouse.com !!!

Asscoited = both, quality and quanity, I especialy like AE they have been in the bussnuess for a while, they have a great team which thinks and helps designs their product!!!

 

[Nitroaddict]

diver - they are right about associated building a better mousetrap - however, the ofna multibox has served me well for use on my NTC3.

 

[Diver6127]

Looks like it's gonna be OFNA for me. Gonna be using it on my NTC3 and an HPI Super Nitro Rally.

The HPI is gonna be the trainer car for my wife since it's not that fast with the engine that came with it. She tried my NTC3 and paniced. To make a long story short, she went head on with a parked car and the NTC3 lost.

The HPI mill is really slow. She shouldn't cause too much of problem with it. It just has to be retuned. Sux that it only has 1 needle.