Racing bypass valve, cont'd – Vortech Mondo Bypass Valve User Manual
Page 2
RACING BYPASS VALVE, cont'd.
TUNING:
The preload adjustment screw affects the point
at which the bypass valve opens and closes.
Most applications should need no adjustment
and are recommended to use the unit as re-
ceived (adjustment screw fully extended); this
allows the lightest spring tension, permitting
the valve to open earlier (approximately 4"-5"
Hg) and supplies sufficient force so that the
valve will seal at any amount of boost. Apply-
ing more spring pressure will allow it to open
later (approximately eight turns will allow the
valve to open at 9"-10" Hg).
REQUIRED: ATTACH A
1/4"MANIFOLD REFER-
ENCE LINE FROM A
VACUUM PORT ON THE
INTAKE MANIFOLD TO
THE 1/4" BARB (THE
PORT MUST SEE BOTH
VACUUM AND BOOST).
IMPORTANT: THE DIA-
PHRAGM VENTS SHOULD
NEVER BE CAPPED OR
PLUGGED. AIR MUST BE
ALLOWED TO MOVE IN AND
OUT OF THE UNIT FOR
PROPER OPERATION.
NOTE: It is recommended that the pre-
load screw not be turned in more than 4
turns. At NO time should the screw be
bottomed out. Internal damage may
occur.