figured it out, its the tire pressure. started out tonight trapping high 107s, dropped the air down to 14psi after 8pm and car slowed down alot, barely trapping 107, so for shits i put the psi up to 16 and the car trapped 108.20, put it back to 15psi and it slowed down to 107.70.
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1999 Z28 T-Top M6 - LS6, Bolt Ons, Suspension, MWC Narrowed 9" - 415rwhp 385rwtq 10.847 @ 125.17
1989 IROC-Z H/T M5
2006 F350 SCSB 4x4 6.0L Diesel - Studs, EGR Delete, Powermax Turbo, Extreme Tuning & Exhaust - 13.23 @ 101
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