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20% rule about 38-39 psi in good air. Put a new K9 on this week, be interested to see if it helps.
Alan Johnson 481X, P/M 1471 helix at 20%, 12.5-1 compression with 32-34 degree timimng. Works for us.
also run a Pleuger, pressure never goes below 125#, have used same setup for years,no bearing problems.
We had this exact problem with our Alan Johnson motor, added 2 more quarts of oil, no problem for 2 years. Note, we also use a tall, vertical...
We like to have one that will hold all the oil out of the pan, some alcohol, a couple of pistons, and a few misc. parts. :D :D :D
We monitor the temp. with a 2" probe in the back of manifold. If the air temp is 80 deg. f. at start, will be 120-125 f. at finish. Temp will be...
40 psi w/ Kobelco will raise ambient about 40 degrees.
We run the System One at 150 psi.
You probaly wouldn't have to, but it might help heat to be more evenly disipated with the water heads, which otherwise will be solid heads with a...
We like 'em in P/M, been using them 2 years.
Thanks, does this help lube/cool the blower? Vaporize fuel better?
Is there a general rule for the percentage of fuel through the hat vs. ports with a roots blower? Not looking for exact numbers, just if there is...
What is a "dribbler"?
