New guy carb question- how to select the right jets? Options

[Chily89]

I'm helping my friend get his car working correctly. We are having some carb issues. What is the process for getting the correct idle jets? I have read instructions on the redline website but I'm still having issues. The 914 is a 4cyl 2270 with dual weber 44 Idf's.

I read something about removing the main stacks then driving around. Can somebody please explain this method further.

[ThePaintedMan]

Yes. Which is why I suggested to start there first. It may not solve it, but you need to eliminate unknowns before you can tune it correctly.

Try that and see if it makes a difference on your readings. If it's a quality wideband, what you should see should be accurate.

Stu - think of it this way, widebands operate using the same Bosch-design O2 sensors that all modern EFI systems use to dynamically adjust mixture (of course there are other upstream sensors and calculations going on too). Yes, they are most accurate at temps above 1000 degrees, I think, but that shouldn't matter after a few minutes of running as the heater circuit for the sensor itself should be maintaining that. The old narrowband gauges were only accurate at a constant load, like WOT.