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Old 05-18-2006, 03:15 AM
red65mustang red65mustang is offline
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the modulator is adjustable for vacuum Hg/shift points, 3800 rpm launch is lots of Hg

the brakes have a one way check valve so the booster holds whatever the max Hg is above idle (ex:25Hg on a downshift, excellent check valve will hold it for 2 days with the motor off)

if the idle Hg is so low (below about 12Hg) that the brakes don't work due to the cam, you can't tune the carb

if you want to (????why) be able to turn off the modulator, just add a $5? inline manual on/off barbed valve to the modulator hose

I tried a ten turn fine adjust on/off valve once, to see if I could adjust modulator diaphram reaction time, didn't work on a C4,
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