Compression ratio - OE is 8.9:1 with a 13cc dish. Because I planned to run the Diamante cams with the later closing intake, I had the Wisecos made with a 10cc dish. Static CR is now raised slightly to 9.05:1.

Boost is now the same as before - I have 7psi from off-idle all the way up. The reason I didn't think I had as much now was because initially I was being cautious and not letting the transmission kickdown during early tuning. As long as the rpms are up, I have plenty of boost.

The later closing intake valve in the Diamante cam is why there is less air to compress when the blower is off-line.... also means effective CR is lower than OE.... the net difference considering cam timing and static CR is around .15-.20 dynamic CR less than OE when not in boost.

I agree that if the boost number dropped it could mean that the engine was breathing better - and I think it is. The flat torque curve is probably a combination of the blower, the work I did to the heads and exhaust manifolds and the exhaust system. The dyno graph suggests that the engine is flowing air well.

I'm probably not conveying my driving impression well - with 32" tires, I find the engine operating around 2000rpms a good bit - particularly with around town driving. The torque curve is much later and I'm running out of vacuum before I can get on the power curve, causing the blower to kick in sooner. My seat-of-the-pants feeling is that I need to move the torque curve lower so it can be better used for all-round driving. I'm really not on the curve at most highway speeds in O/D either.... and I can't seem to get to the curve very easily without the blower coming on line because of the transmission shift points.

Initial fuel mileage was terrible - the first tank was 11 mpg. As the tune progressed, it improved to 12 or so. I haven't checked it since the dyno tune, but will have a chance to do so this weekend - hopefully it has improved, but we actually richened the mixture in a few places.

Frank