Automotive Vacuum Pumps for AC use
A (funny?) story from the old days. My 70 440-6 RR had had "hang on" air added, ARA or something, with a large welded plate that bolted to the water pump bolts and a brace over to somewhere on the intake. In the early 70s, and fuel was going nuts, I swapped in a 340. THAT is a long story. One day I was "wishin" and it ended up drilling some extra holes in the 440 AC mount, and doing some clearance cutting, that thing bolted right on!! An we are talking hand tools, etc!!! So when it was time to re-charge it, and R12 was cheap, and no vacuum pump, I started out by warming it up good, as I knew heat would help drive out moisture and purged the system by blowing a couple of cans of R12 through the system, then evacuated it by USING THE ENGINE VACUUM!!!. As it pulled down, I would close the AC manifold valve, rev up the engine, then reopen the valve as the engine spooled down LOLOL
Hey, IT WORKED!!!
I was BROKE after the 340 swap. It later got some case rocker covers, Hedman headers, and I generally used a QJ or Holley spread bore carb.
A (funny?) story from the old days. My 70 440-6 RR had had "hang on" air added, ARA or something, with a large welded plate that bolted to the water pump bolts and a brace over to somewhere on the intake. In the early 70s, and fuel was going nuts, I swapped in a 340. THAT is a long story. One day I was "wishin" and it ended up drilling some extra holes in the 440 AC mount, and doing some clearance cutting, that thing bolted right on!! An we are talking hand tools, etc!!! So when it was time to re-charge it, and R12 was cheap, and no vacuum pump, I started out by warming it up good, as I knew heat would help drive out moisture and purged the system by blowing a couple of cans of R12 through the system, then evacuated it by USING THE ENGINE VACUUM!!!. As it pulled down, I would close the AC manifold valve, rev up the engine, then reopen the valve as the engine spooled down LOLOL
Hey, IT WORKED!!!
I was BROKE after the 340 swap. It later got some case rocker covers, Hedman headers, and I generally used a QJ or Holley spread bore carb.
