Need tuning help on 340
Get the idle set up properly and work UP from that foundation.
I have some frustration there as well.
It's idling now with A/F in the 12's now, if I lean it down with jetting so it will idle in the 13-14 range then I can't get enough fuel for "power" mode. I already am running a 75/37 rod which is the thinnest "power" rod Edelbrock makes, and the largest idle/cruise rod that they make.
It has the "plain" 8" springs (strongest in Edelbrock's spring kit) and it is in the top hole on the accelerator pump.
I keep thinking I'm missing something here. It wants almost no fuel at idle, and a quite a bit in midrange, and a whole lot WOT.
I've run without the secondaries and can get fairly close on idle/cruise (13's) but I have to stay "8% lean" and then get 15-16 or even higher A/F with some throttle which seems a bit on the lean side. (with "plain" heaviest springs) Then when I hook up the secondaries it's hard to get enough fuel.
Apparently it needs very small primaries and very big secondaries??
Time for a Thermoquad? (Won't fit my LD340, though) O:)
