331 Dyno #'s Dead @ 5100 RPM (Long)

[Fox-4-Cobra]

I did not clarify in my update post that the peak HP stayed put from 5100-5300 before dropping this time.

I dont know much about the computer systems and programs that work with the Dyno's. Would I have to get another run or would they have it saved from my tune so they could check it with the next upgrade? I would love to get it and e-mail it to you guys.

I figured the GT-40 Irons would hold me back some but felt the car would put out 275-295 RWHP as is. I was originally planning to use those heads until winter and then replace them for something better. If it's not the heads then I'am at a total loss for what would be holding me back.I did not expect over 300 RWHP with the GT-40 Irons with just a mill job and 3 angle on them. I have tried replacing the TB, Fuel Filter, Plug Wires and MAM and gained so little

I'll call the shop and see if I can get something worked out if they save the programs. Hate to drop another $ 100-150 on a retune without heads.

Appreciate the help guys.