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Fine tuning walbro carbs.

Pullstart

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Hey guys. I was just thinking about fine tuning walbro carbs "Wt, Hd" as that the pop pressure has a part in fueling a certain amount per spring presure. Does it only provide a base for high and low speed needles?

Or does it help with different sides of the fueling per internal circuit? Just was checking to see if anyone has looked into this or lost any sleep over thinking the possibility of lost performance.

Just thinking that the range of pop pressure setting "8-14 psi is quite a range" would have some play to fueling on the more low to mid or mid to high. Anyone got info on this?
 
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