Pop off pressure question

[WaveDemon]

It seems most people have a pop off in the high teens. Is there a rule of thumb on starting pop off pressure?

 

[waxhead]

its all about what your engine wants
pop off is just one of the tunning areas as you go through the carb circuits

some skis will have a much higher popoff becaus ether eporting or pipe pull on the carbs hard down low
bigger carbs tend to like lower popoff
this is not a rule but a generalization
i would listen to what your engine is telling you

 

[SkiDaddy]

List yer specs Tim.:sneaky:

 

[keefer]

Yeah, what Wax said. Sometimes low pressures lead to fuel dribbling and dirty carburetion or fouled plugs. Paul at Magoos has many engine setups documented and can give you a good ballpark to start with. He also usually has lots of needle & seats, and jets in stock. http://www.jrmagoos.com/magoo.html

 

[WaveDemon]

Yeah, what Wax said. Sometimes low pressures lead to fuel dribbling and dirty carburetion or fouled plugs. Paul at Magoos has many engine setups documented and can give you a good ballpark to start with. He also usually has lots of needle & seats, and jets in stock. http://www.jrmagoos.com/magoo.html

this is actually a magoo motor. we just need the to tune the low end. I may call him on it...

 

[steve802cc]

Some good reading material for you.
This is the tuning manual from Mikuni for those carbs
http://www.mikuni.com/pdf/sbn_manual.pdf

Steve