I have some huge boost creep issues. I have removed the G-valve, backed off the tension on the actuator and finally I disconnected the waste gate actuator completely from the swing valve. Its still building boost to way over 20PSI. This is a fully open wastegate port.
I had no problems with the stock head. I had it set up to run at 19PSI. It held it rock solid. I recently installed a ported head and now I cant keep the boost down. I didnt think that this would flow enough to do this.
Has anyone else had this problem?
I know people have ported thier wastegate port. But how much have you guys opened it up? I intend to do this only one time. Are there any write-ups or pictures around?
I think that since I have a wide open gate and it still creeps up over 20PSI in a hurry, I can open it up a good bit. I talked to Chris at TU and he said to open it incrementally. But how much should I take on the first go? 1/8"? 1/4"?
My set up:
1989 Caravan
2.5 w/built A413
Tyler's +1mm G head
Hybrid TO4E 46 trim w/ .63 stage one turbine
3" TU SV
full 3" exhaust
Thanks guys,
Jeff