My experience was that the SSIC took away about 4 to 5 degrees of KR during a 1/4 mile run. This was on a mild 3.4 setup (3.4, front PLOG, SSIC, SR rockers, and 3" downpipe / catback plus tuning with an AFC). The car ran high 13's to 14 flat consistently. I didn't have a reservoir, just the SSIC and a Scirocco FMHE and some extra hose length.
If you decide to install the SSIC, there is a problem with a stock gasket leaving a gap in the core that can create a vacuum leak under the snout. You need to cut some extra gasket material and fill in this area.
you can PM me with any questions if you need help.
