Just yesterday I noticed that boost is coming a bit later that usual… Earlier that day I did a pull from 2nd to 3rd and as I let off the rpm dropped to about 300-400 but came right back up… I didnt think anything of it and parked in the lot to go to work… After work on my way home I decided to do another quick pull but it didnt seem to get boost until 3500 or so rpm… usually boost would start to build around 3000 or so… I’ve checked for any boost leaks and can’t find any… Im still getting full boost at 10psi but can’t figure out what’s going on… The turbo im running is a T3 .60/.63 … Any ideas would be appreciated… thanks
Don’t just look for boost leaks, do a boost leak test. Cap the turbo inlet off and pressurize the engine up with an a compressor through a vacuum line and start spraying soapy water. You can still build full boost if you have boost leaks, the turbo just works that much harder to maintain that pressure with a leak in the system. aka, more heat = detonation.