Originally Posted by jarkko (Post 12186531)

Maby someone can point me in the right direction to look for a reason for the strange behaviour of my sons Novarossi Flash .12 with 2660 pipe.

Towards the end of a nice training session (about 12 tanks of faultless operation) the engine started suddenly to go extremely rich 1-2 times per lap for a short period like 2-3 secs and then operating well again. No changes were made in any settings. Temps were normal about 125-128 celsius before disaster started and then temps dropped very much. For some reason the engine flooded on its own for short periods and then continued normal operation on its own. When the problem was on it sounded like a new engine during early breaking in and it would not take any higher rpm.

What could cause a normally functioning engine to start suddenly going extremely rich for short periods of time and return to normal? And this repeated very poor / running well / very poor...

Before the session we put in a new air filter and afterwards it looked like the carburator had somehow flooded up to air filter too.

Any similar experiences?

Air was about 20 celsius and weather was sunny and dry.

Originally Posted by jarkko (Post 12186531)

Maby someone can point me in the right direction to look for a reason for the strange behaviour of my sons Novarossi Flash .12 with 2660 pipe.

Towards the end of a nice training session (about 12 tanks of faultless operation) the engine started suddenly to go extremely rich 1-2 times per lap for a short period like 2-3 secs and then operating well again. No changes were made in any settings. Temps were normal about 125-128 celsius before disaster started and then temps dropped very much. For some reason the engine flooded on its own for short periods and then continued normal operation on its own. When the problem was on it sounded like a new engine during early breaking in and it would not take any higher rpm.

What could cause a normally functioning engine to start suddenly going extremely rich for short periods of time and return to normal? And this repeated very poor / running well / very poor...

Before the session we put in a new air filter and afterwards it looked like the carburator had somehow flooded up to air filter too.

Any similar experiences?

Air was about 20 celsius and weather was sunny and dry.

Originally Posted by choisan (Post 12252383)

Anyone knows why the collari 09 is on sale for about US$250?
Any issue with this engine?

Originally Posted by wiggindude6969 (Post 12314370)

This weekend in Houston, It seemed that everyone was having issues with motors flaming out. The track temp ranged from 125-150 and the actual temp was around 98-100. When the track temp gets that high, what are the affects on the tune?

I tried to richen the bottom end, which helped but after the straight, halfway thru the sweeper the motor would flame out. A lot of guys had the same problem.... I was running the maxy 5 port " off road" with a 6 plug and 6.5 venture. Just looking for tips to help tune when the temp gets hot. The motor seemed to work well when the track temp was under 120... when it got to 150... it kept flaming out. thanks

Originally Posted by choisan (Post 12252380)

Anyone knows why the collari 09 is on sale for about US$250?
Any issue with this engine?