187+mm Pulley & 57mm Tune Question

[JojoWHAT]

Sorry if this is in a thread that i could not find or has been answered . Most tuners i noticed offer a tune for the 187 mm dual pulley set up. For everyone who has bigger 187 mm Pulley with ultra charger etc. What tune are you using? or are you using the 187mm / Ultra tune. Thanks guys sorry if this has been answered !

[GandalfTheIbis]

We're all still using those off the shelf tunes. 187/57 is just the biggest combo that most tuners will recommend primarily because without really good cooling heat will pick up past that point.

Porting/throttle bodies might help to combat heat to some extent which allows some of the Ultracharger guys to take better advantage of the boost from bigger cranks. It's probably not just about the heat though.