bypassing it is okay for summer, but for winter you may not want to.
Background: basically, you'd skip the TB coolant lines w/ this mod. Instead of the coolant going head -> tb -> back of IM, it just goes from the head to the back of the intake manifold. This would in theory lower the throttle body's temperatures and minimize heatsoak to the air charge, thus increasing power. The reason it's there is so the TB doesn't get stuck open in colder temps.
Plus: cooler air = more power, right?
Negatives: very very very minimal gains.
BUT, more importantly, there's the idle stability. On cold starts, for several minutes until the car warms up, the idle fluctuates like mad. If you've ever had your TPS or IACV go bad, where the idle jumps from around 1500 to 3000 RPM, you know how annoying it is. Even on somewhat-warm starts, this will happen. I presume that the closed-loop operation is somehow disrupted.
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