Trying to make this short and uncomplicated as possible. What AFR should
you shoot for on these air-cooled engines while cruising? I suspect I don't
have it right as my oil temp is going eventually to 230F after 20minutes or
so when it's 80F outside.
I had the O2 sensor hooked up after the build but was doing only the full-throttle
graphs.
Configuration:
short stroke crank with 86mm JE pistons, DC30 cams, 2.3L. Heads are 72 911T
but with those small ports opened up.
Weber IDA:
32 venturis
55 idle jets
135 main jets
170 air corrector
F26 tubes with 2 of the 4 topmost holes soldered up
This is in a 914-6 so no external cooler stuff. My gauges have been working
fine and last year when engine was 2.2L temps were better.
I don't have real data for cruise AFR, but it was below 14.7 or I would have
noticed.
Would like to make a change in the jetting that mainly affects low throttle
at highway rpms without messing up the full-throttle high rpm mixture that
I already like (attaching graph FYI)
Thanks,
Mark S.