2.5" to 2.4" pulleys

[Mongopushn]

I have the VMP quick change hub. Does a pulley size swap need a tuning change each time or does the car adjust somehow? Mines an '08 if that makes any difference.

Reason I ask, I'm going from a VMP twin 72mm back to a 67mm TB. I have an older tunes for the 67mm but tit was written for a 2.59" pulley instead on my 2.4" I have now.

 

[Catmonkey]

I'd check with whomever wrote your tunes, but generally, the loads should be changed in the tune to handle the increase in boost.

 

[RedVenom48]

Depends on you tuner, but typically it should adjust for boost. My current Lund tune is a 93 tune that can detect boost and 91-93 octane

 

[ALLKHEINZ]

I would think a dyno tune for "all in" on max boost would be smart idea then swap to bigger pulley without a worry....im doing this on my 14 gt500....tuned on quick change 2.4" pulley but have 2.5 and 2.6 to swap on for less boost and street fun