throttle body

[kilo97civic]

if i bore out my throttle body to 62mm will i be running lean....i do not have any fuel mods on my car at this time...if i would run lean what do i need to get to even out the mixture...

[2ndGenTeg]

No, you won't run lean.

A larger bore TB doesn't actually affect the amount of air flow coming into the engine. Your intake manifold and intake ports are still the same size, creating bottlenecks. Also, unless you have an aftermarket cam, the valve lift and duration are not going to flow more air, anyways.

IMO, bored throttle bodies only make sense as part of a much larger whole.