when I got my custom tune on my gryphon my idle in drive was approx 660, it slowly crept up to about 730 over time. Installed the UD Pulleys and I'm at 640 idle in drive.
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Specs: 2004 4.6L SCAB | Gryphon Programmer 87 Performance | Magnaflow True Dual Exhaust - Rear Cat Delete | S&B CAI | Summit Underdrive Pulleys | Troyer eFans (ordered) | Smittybilt Bullbar | Procomp 6" Driving Lights | UWS Toolbox | Rhino Lining | Chrome Steprails | 2.5" Leveling Kit | 265/70/R17 Goodyear Wrangler AT's
Vids: Magnaflow Startup & Revs - Interior Exhaust Sounds
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