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Old 11-09-2012, 04:38 PM   #36
reid-o
Scooby Specialist
 
Member#: 103631
Join Date: Dec 2005
Location: Mililani, Hawaii
Vehicle:
2004 STI
Black

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Wouldn't the safety window depend largely on the EGBP? I don't notice such swings in EGT when I'm playing with a lot of the bigger turbine turbos like the 6266 and the 35r as compared to a 60mm turbine on the 30r or a stock location turbo with a smaller A/R, which I try to keep to the guidelines that you both suggest here. I noticed that most of the larger turbines and a/r turbos drop egts too much below 11:1 to the point where I need to increase timing to bring torque back up. I've found that 11.2 or near 11:1 seems to produce a bit more torque on the larger turbines. I do try to stay below 11 if the car is running some type of 63 housing or some strange hybrid turbo.
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