I bought my first astra sri turbo on Saturday and am absolutely loving it but i just have a couple questions.
1) Its currently running a Milltek catback exhaust (guessing 2.5 inch bore), VXR turbo along with the (i think) 1.9 airbox conversion and collins dumpvalve (OE dump valve also still in place and working). The last owner said its currently running the standard map, would this damage any damage to the turbo or engine?
2) I noticed yesterday that on boost, it goes up to 10psi then drops down to about 6-7 psi. Is this down to the standard map?
3) Is the EDS IPF unit a good investment or is it better to go to the tuners themselves?
4) What type of boost guage does everyone use? Mechanical or electrical? And woudl you recommend getting oil pressure and temp ones as well?
Sorry if these questions have been asked over and over again but im a bit of noob when it comes this turbo business and just want to make sure everything is all ok.
Other than those questions above, ive figured out most of the stuff myself with the information on forum