Tornado BB Pro

Just wondering if the HPI Nitro Star K4.6 would fit my Tornado BB Pro without too much mods? Or what would be the BEST option for upgrading engines?

ehroof

os .18 cvrx : http://www2.towerhobbies.com/cgi-bin...?&I=LXGGP7&P=7 perfect fit and much more power than the stock engine

Tornado BB Pro

This motor is much better than the stock Team Infinity that I have in there now?

ehroof

bro, i have 2 of them i swapped it in my hpi rs4 3 evo and my t maxx. much more power than the stock one

Tornado BB Pro

How about this one....O.S. 18TZ (S) Turbo w/Rotary Carb?

ehroof

that has a rear exhaust and wont work on the redcats, you need a side exhaust

Tornado BB Pro

The only mod I would have to make is cut the body though....right?

ehroof

i dont think you would have to do that, you may need to trim the body but i dont think so, besides that it will bolt right in and you will be very happy with it and its not that much money, make sure you upgrade the clutch bell too so you dont rip the gears.

Tornado BB Pro

I was talking about with that rear exhaust motor. For some reason, I think the more power, the better, but I should get used to the car first ehh?

ehroof

i dont think the car is setup to use a rear exhaust motor, theres not enough room behind it, it would be a good idea to use it a little first, the .18 that comes with the redcat isnt a slouch.

Tornado BB Pro

Yeah, I got the Pro model, so it has the Team Infinity Motor in it, it says it will do 65, but I am sure that is with pure Nitro and the upgrades?

Tornado BB Pro

Also, I was wondering if a motor with a round exhaust outbore is better than the retangular one? It seems like the air flow is retricted with the retangular. But who am I to say?

AllAboutFunHobbies

If I was you I would use these engiens much much better, [link=http://www.stsmicroengines.com/index.php?main_page=product_info&cPath=12&products_id=22]http://www.stsmicroengines.com/index.php?main_page=product_info&cPath=12&products_id=22[/link]

there awsome engines, we sell them and use them in our race cars.

ehroof

you can use a different header, something for an hpi .15 should work, i put one in my hpi rs4 3 evo and it bolted up to the os engine, just make sure its for the same side exhaust. that engine all aboutfun posted is nice but its not as powerful as the os .18, its good for racing since thats the size engine allowed. Also that sts engine has a slide carb and you need a rotary one. I was looking to get the .28 sts for my hurricane

Tornado BB Pro

Is the .18 not allowed in racing?

ehroof

from what i understand, true racing is only .12 allowed. i dont race professionally and thats why i put the os engine in, more power, lol

Tornado BB Pro

Well hopefully they will have a class with the .18 here in Cali. If not, I guess I am buying a new engine!

ehroof

lol, maybe they would believe it a .12, lol

nitrospeed33

i looked at the engine and it said it needs 5-30% nitro. and no less than 18% oil content. does that mean no traxxas 33% or does traxxas 33% have enough oil?

mozzzy_2000

the amount of oil content used is debatable really. Some people prefer more oil than others whilst others do not. Some engines prefer less than others and some do not. You'd able to get way with using 33% but just use more care and I'd say that your engine(or any engine) will need to be shimmed for that % of nitro. This reduces the engine's compression, otherwise you risk premature engine wear.

nitrospeed33

i haven't ran the 33% yet on my engine that i have now. and when i took off the cooling head a couple days ago to clean it all out i didn't find a shim. should i have had one? and where can i get a shim for when i switch to 33%? thanks