Final drive 3.44:1 and testing done in town up to 40 MPH or so, pretty sure stock cam.
Did not want to drill hole in the dash I built so found suction cup mount gauge pod.
After some tweaking overall happy, save the rapidly and constantly changing readout.
Averaging 13-13.75 idling smoothly at 800 RPM, will tick lower/richer ratio the longer the idling time.
Averaging 14.5-15.5 steady state throttle cruising.
All good so far, but first run, using manifold vacuum to distributor advance, hitting 17 and higher on hard acceleration. Swapped to ported vacuum and down to about 15 on hard acceleration. My conclusion is the extra spark advance from ported over manifold vacuum giving increased advance under heavy load allows more complete combustion before exhaust opens. Changing from ATF to engine oil in dash pots helped reduce hard acceleration ratio slightly.
Carbs Pistons have about 7 second drop test with AAP spring loaded needles and 'Red' spring. Wonder if switching to 'Blue' spring would enrich the A/F ratio on hard acceleration? Jets seem fine elsewhere.
Also my max advance was limited to about 20 degrees with the 65D I had, the replacement I installed is very similar. Anyone know of Mini distributor curving facilities stateside? I would like to have my old 65D recurved, any suggestions on an appropriate curve? Understand I should be shooting for 30-34 max.
Apologize if I can't figure how to get my darn IPad to post photo right side up!
Edited by gdcarpenter, 19 May 2020 - 06:03 PM.