No need to shim an LBZ but a blocker is needed to build boost over 25 psi.Should put you in the 420-440whp range. Need to do egr block off and shim kit for added help. The PPE 225 is still dirty and has enough to toast your stock trans. Boost controller will give you bout 30whp extra and lift pump will help keep your CP3 from starvin too!!
Shimming does help, if you go to NMTDR.com you will see a guy on ther puttin down 540whp with the mods we did on his 06 lbz. Shim kit helps keep the fuel rails full. If it didnt help PPE would sell it and my buddy wouldnt have picked up 2000 more psi rail pressure.No need to shim an LBZ but a blocker is needed to build boost over 25 psi.
What kind of guage do you have? The guages that get there reading from the computer are not very accurate. When I did'nt have a blocker I could force my boost up to 40 psi with a boost controller but it would only produce 25 psi without the controller, I installed the blocker plate and then it would go to 32 without the controller. Don't know much about Bully Dog but with a PPE programer you need a blocker plate to get over 25 psii have stock egr and my truck hits 33psi like its nothing
id be careful at the track with the 225. its nasty on stock alli. but ive ran mine on 225 for 99% of the time and had no problems. ive tried and tired again to limp mine to see how far it can go but i cant as of now...So just one or 2 passes on the 225 tune would fry the tranny or just dont run it all the time. I normally run around on the tow tune but was thinking about installing the 225 when I go to the track.
I am going to get Boost Guage and Pyro before I install it at all.