Just got my cam ordered, and I will be running the S1X. I found it for a good deal so the XP is out the picture. These cams are a little bigger than the VS, and the performance is nearly the same with basic tuning, But with a GOOD TUNE the XP and S1X should out-perform the VS noticeably (especially in the high end). The heads are almost finished. Got a good valve job and they will be very lightly ported. I decided to mill them down .020 for an overall compression ratio of 9.73:1. I like the thought of higher compression with Lower boost. This should be better for throttle response and gas mileage. I also like the thought of not spinning the blower and creating a ton of extra heat to get power.
While waiting for all the parts to get finished, I had the LIM hot tanked & lightly polished the ports on it. Then I prepped and painted it. I also Cleaned, primed and painted my valve covers, Blower, fuel rails, Throttle body, and TB adapter.
Early this coming week, She should be re-assembled and running again
