pinch problem

[miami fanatic]

i have owned a novarossi rex p5 and a novarossi top 421b. both of these motors i broke in using the bess heat cycle method. both lost there pinch after a week of racing.basically two heats and five minute main.just wondering if anyone has any suggestions to what I'm doing wrong :shrug:

 

[El Pirata]

I am assuming by the word pinch you meant punch. That being said, are you running too rich? Regardless of whether you messed with the needles or not they could have rattled loose. You also might want to look for leaks in the fuel system or the pressure line.

 

[miami fanatic]

i meant pinch isn't that what you have if tou remove the glow plug and try to turn the flywheel.it doesn't want to idle.it also dies after about three minutes of running.

 

[shorty]

compression is the word ur looking for. And with ur glow plug out u wont have a lot of that

 

[miami fanatic]

okay compression instead of pinch what ineed to know is why am i losing it over that short of a period

 

[FRIDGE]

your losing compression because you have an air leak somewhere. it could be a loose engine piece,a loose coolin head, maybe your fuel tank has a small crack or isnt sealed, try changing your fuel lines also.

 

[Nitro_Freak]

may be an air leak, or maybe you weren't taking care of the engines properly. dirt may have gotten inside the engine..

 

[miami fanatic]

the 421b is brand new how could dirt damage the motor