Man was I crushed when I took my ride out tonight for a scan and saw the same amount of KR after installing the 3" D/P as before. Actually there's even a little more, It peeked at almost 7' KR as apposed to 6' and it starts showing up around 2000 RPM's (Under WOT) whereas before it was 3000+
Edit! Here's the scans for those interested...
SCAN1 - Before D/P Install SCAN2 - After D/P Install Other things I notice about the Downpipe is that the car definately feels a little diff. Hard to explain exactly but more "rougher". I don't know if the car is any faster, it may be my imagination but it feels potentially slower now. I pinned it from a stand a barely spun the tires where before I could spin them for 3 blocks if I wanted (Granted I have new tires now which would have some contribution to that).
All in all, I don't know if it was worth the $375.00 Installed and I'm still stuck fighting the KR Issues. Not sure what to do next, if anything at all, live with it maybe?
Cheers All!
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2002 GTP
1987 Buick Grand National
Intense PCM, 3.5" Pulley, SLP C.A.I, 3" D/P, Flipped FSB, U-Bend Delete, Flowmaster 50 Series, Autolite 605's, Drilled 180 Thermo, Falken FK-451's (245/45ZR18), Motegi FF7 Hyper Black 18x7.5, SS Grills, Tint & Overlays here and there.