352LikesNOVAROSSI Engine thread....
03-06-2013 | 04:57 PM
#5101
I have a Plus 4BTT that's seems to always want to run hot and am not sure why ? It wants to always run at 275 with not even a race tune on it yet and too me that seems a bit hot ?
It has about 0.8 gallons through it now. Its been rebuilt with a new piston/sleeve/rod and bearings. Changed the carb out with another Novarossi one i had and still the same result.
Car is new MBX7 and drive train spins free as can be. Its also been made light at 3240g so its not like the engine is having to work hard to push it.
Engine has lost its metal pinch at TDC also. No air leaks in the fuel system.
I just don't know what it could be. Its blowing a nice thick smoke trail all the way from bottom to top end..... ?
Any ideas ? If i try to really race tune it it just gets even hotter pushing 300. But if i ritchen it i loose top end and power and run time.
It has about 0.8 gallons through it now. Its been rebuilt with a new piston/sleeve/rod and bearings. Changed the carb out with another Novarossi one i had and still the same result.
Car is new MBX7 and drive train spins free as can be. Its also been made light at 3240g so its not like the engine is having to work hard to push it.
Engine has lost its metal pinch at TDC also. No air leaks in the fuel system.
I just don't know what it could be. Its blowing a nice thick smoke trail all the way from bottom to top end..... ?
Any ideas ? If i try to really race tune it it just gets even hotter pushing 300. But if i ritchen it i loose top end and power and run time.
03-06-2013 | 05:08 PM
#5102
I have a Plus 4BTT that's seems to always want to run hot and am not sure why ? It wants to always run at 275 with not even a race tune on it yet and too me that seems a bit hot ?
It has about 0.8 gallons through it now. Its been rebuilt with a new piston/sleeve/rod and bearings. Changed the carb out with another Novarossi one i had and still the same result.
Car is new MBX7 and drive train spins free as can be. Its also been made light at 3240g so its not like the engine is having to work hard to push it.
Engine has lost its metal pinch at TDC also. No air leaks in the fuel system.
I just don't know what it could be. Its blowing a nice thick smoke trail all the way from bottom to top end..... ?
Any ideas ? If i try to really race tune it it just gets even hotter pushing 300. But if i ritchen it i loose top end and power and run time.
It has about 0.8 gallons through it now. Its been rebuilt with a new piston/sleeve/rod and bearings. Changed the carb out with another Novarossi one i had and still the same result.
Car is new MBX7 and drive train spins free as can be. Its also been made light at 3240g so its not like the engine is having to work hard to push it.
Engine has lost its metal pinch at TDC also. No air leaks in the fuel system.
I just don't know what it could be. Its blowing a nice thick smoke trail all the way from bottom to top end..... ?
Any ideas ? If i try to really race tune it it just gets even hotter pushing 300. But if i ritchen it i loose top end and power and run time.
Can you get more airlfow over the head ? or thru the head ? these new low profile Nova's tend to get buried under the body and not get proper airflow thru them..... These are air cooled engines and they will run hot if you don't have proper airflow ....Low profile heads tend to not get as much airflow and will run hotter....... Increase the airflow and you should see a reduction in temperature....
03-06-2013 | 07:11 PM
#5104
03-07-2013 | 12:42 AM
#5110
Can you get more airlfow over the head ? or thru the head ? these new low profile Nova's tend to get buried under the body and not get proper airflow thru them..... These are air cooled engines and they will run hot if you don't have proper airflow ....Low profile heads tend to not get as much airflow and will run hotter....... Increase the airflow and you should see a reduction in temperature....
03-08-2013 | 01:43 PM
#5113
You need to understand the dynamics of each engine and THEN make up your mind. Both are very good in buggy. BTT has a smoother power delivery while P5 has more low end pop. Just depends what characteristics you want from your engine.
