I Have to drive to Richmond VA this weekend for my Nephews Graduation, Would it Benifit me at all to put a larger pulley on the Radix. Reason I ask is I cruise at 75,85,90 Mph. Probably about 2500,3000 RPM. Would slowing the blower down a little help anything. I have a 3.2" on now and a 3.4 I could put back on... any thoughts?????????????? It's about 400 miles each way..

 

It is not going to make a difference because you are not generating any boost if you are just cruising. Mangacharger claims less than a 1/3 hp at 60mph. As long you dont get into boost, you will be fine adn you will not notice a difference in changing pullies.

 

I got another 2-3mpg when I added my radix. I am running a 3.0 pulley and its on the 122HH. I don't think changing your pulley will help, better to change your gearing.

 

I don't think a bigger pulley will help. I lost 2-3mpg with both the 3.3" and 3.0" pulley. The smaller pulley made no difference in mileage but, did add some hp.

 

I took a long road trip last month and stayed out of boost for 99% of the trip, going from sea level to 9,ooo' altitude too. No need to swap pulleys.