Which is "...supplying a larger volume to the chassis pump helps the chassis pump to run quieter. Because the chassis pump is not starving for fuel, it does not cavitate; and it just hums along nice and quiet. which implies a correctly functioning stock pump does starve the main pump for fuel.
That may indeed be the case with a k-jet 240T, in those modified with elevated boost pressures, but off of the race track I remain skeptical, especially as it relates to ordinary maintenance.
One thing I am sure of, is anyone who has decided to do this procedure Tom has photo-journaled so well, is the least likely person to write it up as a waste of time and money.
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Art Benstein near Baltimore
Show me a piano falling down a mine shaft, and I'll show you A-flat minor.
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