Gonna try something new this year-a Vortech YSi!
Well with what I want out of the blower and the way I intend to push it, 8 ribs wasn't gonna cut it. So first thing I did is take off the plastic pulley's and factory tensioner and slapped on the HD truck tensioner I have been using on my Procharger brackets. I replaced the plastic pulley with a lightweight aluminum hard anodized double bearing pulley.
You can see in the pics the difference from 8 to 10 rib:thumbs:







Looks like the YSi falls inbetween a F1C and F1R-should be interesting
The exducer is 5.75"


The F1R still looks to be the "all out blower"I'm going to go straight to a 2.8" blower pulley to see what I can get out of it. I'll keep everyone posted!




