mcx 270 bog at low power help

[vip]

just upgraded from 240 to 270 and sled is bogging at lower power setting, full power runs perfect at high altitude runs, sled runs good at low altitude all power setting. in revy know thanks in riding or trying to ride. boost is around 13 or 14 psi

 

[Nytroman]

Huh? If it runs good on higher boost what's the issue?

 

[vip]

the sled runs good at low altitude all power setting . at high altitude like frisby bogs at low power only runns good at full throttle

 

[Kenny_h2o]

Not a turbo guy but seems easy to figure out not getting enough air or fuel up at alt?

Full throttle makes for more air and fuel so your mixture is off for idle and low throttle I'm guessing?

 

[climbmax]

Could be our belt is badly worn and sitting down in the secondary. Check that. Or maybe you have an exhaust leak. Will cause the conditions you described. Does it sound noisy in the tunnel.......the Y Pipe sometimes cracks and needs some welding up.

if you are stuck for help in Revy I know a good guy on Yamaha in town. Ron Mcdougall.

Cheers
RS

 

[vip]

checked exhaust before we left looked good no leaks will check belt. was wondering if fuel pressure regulator can cause this. thanks fro the replies

 

[NM]

checked exhaust before we left looked good no leaks will check belt. was wondering if fuel pressure regulator can cause this. thanks fro the replies

Did you change to the rising rate regulator with the 270 kit, or did you have with the 240?
Make sure the boost line to the regulator comes from the intercooler then confirm fuel pressure at 44 lbs at idle.

 

[vip]

not sure what regulator what ever comes in kit from mcx for upgrade. No guage with, backed off regulator 1/2 turn runs better