Quote:
Originally Posted by msuhanek
Afternoon all - Not sure if I explained this question properly but has anyone seen this type of setup on the LT5? See pic. The prior owner (a ZR1 Registry Member) bypassed both the vacuum(?) openings as you look at the front of the plenum. He took about a 2 foot rubber hose and connected them together on both sides. He said this would help the cooling of the engine especially in hot weather. Any help is appreciated. Thanks
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Those are not vacuum ports but rather coolant line into plenum/throttle body. Looks like prior owner opted to bypass throttle body. This makes servicing under the plenum simpler since coolant doesn't have to be drained prior to removing the plenum.
No down side especially in warmer states.