Wideband Demon Tuning / Graph

[enkeivette]

For reference:

The air bleeds affect the AFR curve and the upper end of the AFR range, while the jets affect more of the mid rpm and only the AFR.

So if I installed air bleeds that were too small, my AFR might vary in the upper rpm range. But, since my part throttle (mid rpm) is already about 13:1, I don't think I'll be richening the primary jets, unless my fuel curve is messed up and I need to install some different bleeds... then all of the jets will change.

 

[BRUTAL64]

The seasonal mix is oxygenation level, if you buy that.
Mobil just went 10% ethanol.ush:
Shell claims nitrogen enriched. (I thought NOX was verbotten).:confused2:
Chevron I THINK does not use etahanol. The Techron is good stuff too.:thumbs:
The rest, I lose track. Too much Wallstreet BS on commercials.

nitrogen enriched---:bonkers::bonkers:

 

[pcf_mark]

Lars - I read your note about getting WOT correct first and I would like to know where jets and power valve interact in this process. Do you believe in changing the power valve channel restrictors to get WOT correct and use jets to get part throttle (2000 rpm and up) afr correct under light throttle?

Or another way of asking:
1) idle mix screws, transition slot, low speed bleeds: idle to 2,000 - 2,200 rpm
2) main and sec jets and high speed bleeds: 2,000 to point of power valve opening
3) power valve channels WOT any rpm

In the interest of a street manners I use power valves but not everyone thinks that makes sense. If I am way off topic because this started as a thread about a blower carb let me know.

 

[pcf_mark]

Curiosity bump.