Wastegate Actuator Replacement

Alturiak · 07-28-2021, 06:57 PM

Another update: the new oversized o-rings from McMaster came earlier this morning so I threw them on the injectors with a bit of chemplex to help seal and lubricate them and took the car for a couple quick logs. In 4th gear at 6k rpm it was boosting 1.6psi higher than before the o-rings were replaced, and in 3rd it was boosting about 1psi higher. So a definite improvement as far as boosting goes, but WGDC is still maxing out at the end of the gear so I'll be back at the shop on Friday to continue smoke testing it. I'm hoping we'll be able to actually pressurize the system above 5psi this time around but we'll see. Fingers crossed! Will update after the next visit, but I'm stoked to be on the right track to getting this thing sorted!

Dan1nugs · 03-08-2024, 06:25 PM

Quote:

Originally Posted by Alturiak

Another update: the new oversized o-rings from McMaster came earlier this morning so I threw them on the injectors with a bit of chemplex to help seal and lubricate them and took the car for a couple quick logs. In 4th gear at 6k rpm it was boosting 1.6psi higher than before the o-rings were replaced, and in 3rd it was boosting about 1psi higher. So a definite improvement as far as boosting goes, but WGDC is still maxing out at the end of the gear so I'll be back at the shop on Friday to continue smoke testing it. I'm hoping we'll be able to actually pressurize the system above 5psi this time around but we'll see. Fingers crossed! Will update after the next visit, but I'm stoked to be on the right track to getting this thing sorted!

Did you ever figure this out? Having similar issue but build no more than 2psi of boost, same issue with the cold start stall though

07-28-2021, 06:57 PM	#23
Alturiak Private First Class 26 Rep 102 Posts Drives: 2011 E92 335i Join Date: Mar 2015 Location: Los Angeles, CA iTrader: (0)	Another update: the new oversized o-rings from McMaster came earlier this morning so I threw them on the injectors with a bit of chemplex to help seal and lubricate them and took the car for a couple quick logs. In 4th gear at 6k rpm it was boosting 1.6psi higher than before the o-rings were replaced, and in 3rd it was boosting about 1psi higher. So a definite improvement as far as boosting goes, but WGDC is still maxing out at the end of the gear so I'll be back at the shop on Friday to continue smoke testing it. I'm hoping we'll be able to actually pressurize the system above 5psi this time around but we'll see. Fingers crossed! Will update after the next visit, but I'm stoked to be on the right track to getting this thing sorted! __________________ 2011 E92 M-Sport BSM, Built N55 with 9.5:1 compression and forged internals, VAC Stage 3 Ported Head, custom tuned by Twisted Tuning, PR Coils, Pure Stage 2, Fuel It! Phoenix Race PI Manifold, StopTech BBK 380mm front 345mm rear, BBS CH-R Titanium, Dinan exhaust w/black tips, BMS Intake, DCT shifter retrofit, VRSF 3.5" downpipe, VRSF 7" HD IC, CSL CF trunk, 335is Rear Diffusor, Alpina B3 Trans Flash
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