I'm having one unusual problem with a 2007 Shelby GT (4.6) Mustang. At wide open throttle in 1st and 2nd gear (Manual Trans), it seems like I'm hitting a rev limiter at 5,500 rpms. I have the rev limiter set at 6400 rpms. When looking back threw the scan, it jumps from 5500 to 6500 at the point I'm seeing the problem. Seems like the clutch is slipping. Is this possible cause? In third and forth gear it pulls right to redline with no problem. Didn't have this problem on the dyno either when doing forth gear pull. What else could cause this problem? Specs are as follows: 2007 Shelby GT (4.6), Paxton 1200 Supercharger at about 12 psi max, 60lb injectors, GT500 pumps, stock Maf in larger housing. I'm attaching my tune and scan to this email. Any thoughts will be greatly appreciated.
P.S. Problem occurs in scan at 4:30 to 4:45 Range