DaveB
Extreme
- Joined
- Oct 17, 2012
- Messages
- 67
Just wondering if there is a "general range" where everyone sets the CO. I understand the CO sets what would be the pilot circuit on a carbed machine and therefore really only affects idle and warm starting. My machine has always seemed a bit blubbery at idle (IE if you let it sit and idle for over a minute it will load up and sometimes stall)...no issues otherwise...so I checked the CO last night and it was at -10 on all cylinders. I tried 0 and it really didn't want to run, so I have it at -25 now and it seems better. Just wondering if this is a "normal setting".
BADSLED
Lifetime Member
- Joined
- May 13, 2004
- Messages
- 1,355
- Location
- Syracuse, NY
- Country
- USA
- Snowmobile
- 2012 Nytro MC Xpress 270
2011 Apex SE
2021 Sidewinder LTX SE - SOLD
I run mine at -20 with afr showing 13.0-13.5. May lower it more to bring it into low 14's or install a PC3 to tune rich low end.
settings
We run our stage 2 mpi apexs at -30 and they are still to rich on the cold start up, warm they are 12.0 a/f jeff
We run our stage 2 mpi apexs at -30 and they are still to rich on the cold start up, warm they are 12.0 a/f jeff
rxrider
Jan-Ove Pedersen
- Joined
- Apr 25, 2003
- Messages
- 7,355
- Age
- 59
- Location
- Lakselv - 70N & 25E
- Country
- Norway
- Snowmobile
- 2014 Phazer XTX, 2013 Phazer RTX, 2008 Apex RTX, 2007 Warrior, 2006 Attak
On MCX turbos I run the C0 at -10 across, some sleds need to go lower to -15.
After -30 you are really not reducing fuel anymore. The curve is not linear, it drops, the reduction gets less the lower you go.
After -30 you are really not reducing fuel anymore. The curve is not linear, it drops, the reduction gets less the lower you go.
Similar threads
