Would this be better geared for a buggy or truggy? What engine on the market would you compare it to?

Hi folks,
this probably been asked before, but I've tried search and I couldn't find the right answer. I live on sea level with 60-80% humidity, temp anywhere between 80 to 100.

I just bought a novarossi btt with 2012 carb. Came from OS background I have no idea how to tune this engine. I followed break in bible and purchased comp heat blanket. Pre heat engine for 20 mins, set everything on factory tune 5 out LSN and 3.5 out HSN. Problem is, I could not keep the engine idle without the glowplug staying attached, as soon as I undo the glowplug heater, the engine would always die. the engine is easy to start but flame out very easily too...Tried running it with the glowplug heater attached and I could see smoke trail, not much tho. Running stockplug that came with the engine, couldn't remember the exact number but it's got 6 on it.

BTW I added 0.1 shim on head to match my climate.

Any advices ??

Thanks in advance.

The 3.5 out from closed on the LSN is to lean for break in. Also, get your self an OD 97T plug fro break in and only use it for the first gallon. You don't want to break in with a $11 glow plug. after the first gallon put your #6 Nova plug back in. Also open your idle gap a little since your LSN is so rich for break in. Make sure your 190 to 210 for the entire tank of fuel during break in and the same for start up. 20 minutes should be enough for the Comp heater to get it up to temp but double check before you start it. Take the break in nice and easy and get at least a gallon before you start to try to race tune. My plus 4 took 2 gallons to break in fully. Once its broke in and the tune is close you will have a great smooth, reliable motor.
On a side note, always use you comp heater before start up, it will extend the life of your motor.

It's 3.5 out HSN and 5 out LSN, not the other way around. Is it OK or still too lean? I gave a bit throttle trim 2-5 step up. Same thing keep on happening.. Fuel is VP 25%.

In my experience with Nitro engines. If you have to keep the glow ignighter attached to the plug. Then the plug NEEDS to be changed. I have been told to only use Nova glowplugs on Nova engines. You always should change the plug after breakin.
Just what I have been tought/ advised. I hope this helps You.

hi.. all novarossi loverss..

i have some questions from you guys since i'm new to RC and a little confuse about tuning breaking in and many more .

so these are my questions :

1. Choosing the right glow plug. I'm from tropical wheather its about 30 - 37 Celcius. and i see from the novarossi that i should use c7tgc for my engine but some says i should use c5tgc i'm a bit confuse. so i finally decide to use c6tgc wich in the mid. but i'm curious if i go to c5 or c7 how that will effect the performence of my motor.

2. from my experience the novarossi glowplug is harder to heat is it true?? my friends says only use a full charge glow heater to heat novarossi glowplug. half full wont go. any tips for that

3. the copper shim. i'm total noob for this thing and googling around not helping at all. how to make a good tune for this part .

4. in my case (4btt) my standard LSN is wayy sunk is it fine? it's may be only one turn from full turn. my engine quite new but it's already that lean for LSN any clue??

5. from the manual of my kit (mbx6r) i should go for 0.5 to 1 mm for the idle but from what i learn and watch idle will be vary to suit your HSN and LSN. i don't get this one. since i flip my car frequently i go for 1mm so the car won't go out since there only few marshal in my track. how to adjust the idle any clue??

6. venturi restrictor. when i go for big venturi when i go for small one. my carb is a new carb any helpp..

7. foam filter. i use a motocros oil for foam filter wich is very2 cheap compare to rc specific oil. is it fine? i use grease too for the side and the screw to seal my filter so finally no air from side. is it fine to do that.

8. my track is tight and have jumps that needed full torque to get pass the last jump any clue for the gearing i'm helpless with the gearing system i use 13/44 standard for my car (sorry out of engine topic).

9. breakin procedure. frankly speaking i never breaking in my engine my self but i'm willing to try it. how to get a good breakin for my motor 4btt tune. i know there are lot's of methods out there but i'm not sure wich one to choose. and i don't have that engine heater so is it ok for me to go. i'm thinking to use the afterrun oil so the slip and the piston will slip a little and loosen the glow plug a bit. after that i have no clue still wandering though i have another 4btt that haven't got breakin. that wil be my testing engine for breaking in my self.

10. the pipe and manifolds. i'm using mugen car. from what i know the manifold for mugen diffrent from others. my track is tight so wich pipe and manifold to choose. it will be a big help if you can explain why choosing it instead of the others.


so that's all my questions guyss helpp will be appreciated for i'm a noob in RC. and i love to learn. waww it's 10 questions for you guys i hope you'll love it.

u added a .10mm shim to the factory .80mm shim stack? bad idea

remove that shim and use a c5tgc for break in

answers in between

great thankss Huston and all

my new engine has 24065 carb from the beginning, i think should go 24063 or 24069. wich one is easier for newbie like me.

plus 21-4 btt huh? hmmm interesting

which market ? not usa?

i havent seen any of them that have came with 24065 yet but.........

Tried that just now. Same thing. Its not the plug. The engine is impossible to start with any other setting other than 5 out LSN and 3.5 out HSN, even then the plug heater need to be attached at all times.....

Never had anything like this happen to OS engine....should listen to the others and stick with OS. Now i have very expensive paper weight.

Just following the manual that came with the engine. Add shim if ambient temp rise. Shall i remove it? To my understanding with real engine, thicker head gasket will reduce compression, very useful if tuning engine in hot weather reducing knock.

I think He is from the same region as me, south east asia. I am from Jakarta and my nova is exactly the same as his. Plus 4 btt with 24065 carb. And yes i also noticed the same thing, the LSN screw seems to be wayyyy in, even with 5 out turn, definitely far from being flush.

Yollie, please keep me updated with your engine. I had massive problem with my paperweight....oops I meant novarossi engine :P

Really really frustrated today....and really miss my old trusty OS....So I decided to heck with it and tried to blow my new nova up... I started it up, set everything to factory, left the glow plug heater on then gave it full throttle for a minute on box....At that point, I really didn't care if the engine blew up.....temp climbed sky high to 302F... shut down the engine, let it cool....Then voila!!! MAGICALLY after the attempt to blew my engine up NOW my engine would idle without the glow plug heater attached!!!??? What give??? Is manufacturing tolerance of Nova really is that bad??? Seriously, not trying to trash nova or anything, not mentioning OS which is million times easier than this, but I've seen Chinese engine with so much better manufacturing tolerance than this Nova. and yes, i used comp heater and always pre heat for 20-25 min to 180-190 before starting...

A side story, I mentioned about adding 0.1 shim, the original nova shim that I bought actually needed to be reamed on the inside edge to fit, once again, is manufacturing tolerance of nova engine really is that bad??..

Before that crazy attempt to blow up my engine, my engine is next to impossible to start in other than factory setting needle (5 out LSN 3.5 out HSN), and 100% impossible to idle without glow plug heater attached....I've changed the plug 4 times!! Switch fuel, richening, leaning, undo plug dump excess fuel for like 100 times, I've tried everything I know and I came from many years of glow engine experience with touring, heli, plane and recently buggy.... Now it idles smoothly, nice trail of smoke and very responsive to tune change.....Now on 5th tank with slightly rich slow run....

The scary part is, this is still the break in attempt, I've heard horror stories about Nova keep on flaming out during run......

Most people I know that come from OS to Nova have a bit of trouble dialing in their engines. It seems to me that people who run OS simply don't know how to properly tune an engine, since OS carbs are so easy to use and it takes big adjustments to see a difference (OS carbs). I have OS engines and feel that their carbs prevent you from really getting a crisp tune. Most every person that I see running OS engines run them to fat on the LSN and HSN because they idle down so quickly. A Nova carb requires very small adjustments to see drastic changes...we're talking 1/16 changes, especially on the LSN.

It's not the engine.....anyone who knows anything about this hobby will tell you that Nova are some of the best engines available.

Learn how to tune, listen to what your engine is telling you and check ALL variables before you blame the engine. I would be happy to take your "paperweight" off your hands if you can't/won't learn how to tune it. I'm sure I can get an easy 10 gallons off that engine.....at your expense