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Message: [QUOTE="euroford, post: 1413843, member: 17667"] Tinkered with it just a little bit this weekend, i tapped new lines for the boost gauge and blow off valve, so now they are running off independent lines and the MAP sensor is on its own dedicated line from the stock tap. Its nice when a little thing makes a nice improvement. The map sensor is showing much more accurate numbers now (before it would lag way behind the mechanical gauge) and the blow off valve is much more responsive. Most importantly, my boost gauge is giving me a more accurate reading, i'm seeing up to 28psi on my hot street tune. this is much more in line with my expectations and makes the backpressure ratio sound a little more friendly. Haven't ran in the race tune yet. i'm sure i'm beating the snot out of the stock turbo, i feel a little bit better about it having done a 360deg. thrust bearing upgrade, though i haven't read much about the real effect of this on the longevity of the stock turbo in a performance application. I still have another fresh rebuild kit sitting on my workbench and maybe next month i'll give it another rebuild. have a kitchen remodel to finish first... right now the wastegate is not hooked up and cranked down tight, I've always felt that my EGT's were under control, i have to be really beating on it to get 1200deg in the hot street tune and that's a rare occurrence, only when driving in full loony mode over top of Berthoud pass. In the race tune i'm barely hitting 1600deg when i fly through the traps at Bandimere. but... if i'm getting all the boost i can out of this turbo, it would be a good idea to wastegate that excess pressure. I think i might look into a boost controller and get that wastegate working again. I know i could just hook a line to it and adjust the preload, but that sounds like a flawed strategy vs. how the wastegate will operate with a controller. and yeah... definitely leaving a lot of performance on the table with this turbo. I'd love to do a T4 upgrade, but i'm also considering the KC38r. that thing has a lot going for it. last year (when i had a nice chunk of spare time!) i fabricated a custom set of uppipes (coated, wrapped, ported, polished, stainless TIG'd) so keeping those is a bit of an advantage for me. if i hadn't done that i'd be totally committed to a T4 upgrade. on another note, since i mentioned it above, I run turbosmart's blow off valve and controller, i hope this help alleviate a little abuse from the turbo, but mostly i run it to improve turbo response when shifting gears. by elevating a little boost reversion into the charger it helps keep turbo RPM's up and helps a lot with turbo responsiveness between shifts. I highly recommend it for the stick shift crowd. [/QUOTE]