Re: Mike's 53 Clipper

Posted by Tobs On 2017/6/6 6:33:32

I think the carb is in a very happy state of tune. I plugged the choke vacume line, and attached my hand held vac gauge to the pipe leading to the fuel/vac pump, and was able to tune the idle to a good 19 inches of Mercury! After re-connecting the choke to the choke stove, the idle dropped down a little to 18 inches, and I could see the mixture leaned out a little due to the air drawn in through the choke stove. Not much, but a little. I then attached the vac pump and wiper system, and I could see that bleeds in some more air into the intake, which leaned my idle a tiny bit, and reduced the idle vac to 17 or 17.5 inches mercury.
My Stewart Warner Vac gauge reads 3.5 inches low compared to my Gunson hand held gauge. The idle mixture is set to about 13.3:1 Air Fuel Ratio now, which makes a nice smooth idle, and fits to what is suggested in the packard carburetor service guide from a few posts back!
My cruising vacuum is between 10 and 20 inches mercury, which I think is good, and when closing the throttle, I see a spike to about 25 inches, which I think is also ok.
Attached are a few pics of the choke stove from below, and my gauges...Tuning with the vac gauge is the way to go. Highest vacuum signal with the leanest mixture possible seems very good.
(Oil pressure gauge is not hooked up yet, that's why it reads 0)
Gotta clean the car up, and change oil and check all fluids in the week before the euro meet!

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