See you should like it... ALOTYes, Yes, and YES! Big difference. You will like it quite a bit.
Just remember with the Perrin map drive it for about 100mi. The throttle response will feel quite crappy until then. Afterwards great running tune. ;D
FOr some reason the Perrin map takes about 100mi to fully learn each cell parameter. But yeah you should still have DAM = 1 I ran that map for a while here in CA.I just installed my stage one perrin kit and have only run it about 20 miles. but even with pulling in excess of 16psi. I have a DAM of 1 so I think that the kit is safe for 91ACN. I am looking forward to running it in and seeing the changes Terry Mc