Originally Posted by
Arushmen
Hi, I have a new (2 race) novarossi plus 21-4btt on my mbx6 and I really disappoint with it
My idle is very unstable
My top end is very bad
I have a lot a flame out in my last race
I use it with the 41039 manifold
I put it another .1 shim because the engine broke 4 plug
But Nothing seems to work
I use p3 p4 from os
i use novarossi 5 6 7 plugs and nothing
I test the 9901 and 9853 and was a little better with the 9901 (to end)
What is wrong? I test the fuel with my other engine (ninja) and work fine
I really disapoint
What else I can test?
Thanks in advance
Did you break it in Or just start racing it ? How tight is the pinch ?? I know.with my btt it was super tight which caused idle issues ,I just turned it up till it broke in. The way you describe your situation tho I think its a tune issue .your going thru plugs ,don't idle and it has no power . This engine.has a smooth bottom end but plenty of power and the top end is Insane . Btw OS plugs in a nova is a no no stick to nova ,many people say od
works I have no experience with them so I can't comment on.them