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as I recall, he had 3.2 bar fuel at idle, 46.4 psi
healthy idle is about -8 psi boost.
assume Malpassi std rise rate of 1.4:1 (HD unit is 2.0)
@ 20 psi of boost ... p = 46.4 + 1.4x(20+8) = 85.6 psi
(with 1:1 gain, p = 46.4 + (20 + 8) = 74 psi
sooooooo
if you observed 70 psi fuel at 18 to 20 psi, mabe pump can't keep up.
his fuel-mix curve implies this, but also may reflect injector duty cycle maxing out ... also very likely. could really use an hks amm signal conditioner.
posted by 63.10.14...
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