Dennis Laaker brought me his 2005 Cadillac Escalade to have a groove put on it. I was a little nervous about doing the groove because my scan gauge would not read his Cadillac.
I used the "trusty" card trick, to cut the groove, and I must have had the groove off alittle. When I started the vehicle, it would not idle right. I then filled in the groove, and recut just ahead a little ways. We went for a test drive and the throttle response was great!!!

Dennis told me that it ran smoother and quieter, also had alot more zip. We are hoping to hear from him soon, regarding a mileage report.

Before After

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180 degrees Water 158 degrees
340 degrees Ex. Manifold 270 degrees
Pre 270, Post 385 CAT Pre 225, Post 347
159 degrees tailpipe 125 degrees

SOUNDS GREAT AARON I think the cads are alittle less forgiving on the idle to groove position. I would not be suprised to see 18 to 20 mpg consistant when the ecu learns afr. Dan gadgetman mo. plan to be there next week!!!!