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RarlyL8 RarlyL8 is offline
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Join Date: Jan 2000
Location: Huntsville, AL
Posts: 13,258
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As you accelerate the exhaust gas spins the turbine.
When the intake charge reaches a pre-set point, such as 0.8 bar, the waste gate opens and diverts enough of the exhaust gas charge that the turbine cannot exceed the 0.8 bar intake charge setting.
The waste gate valve can slightly adjust how much exhaust escapes in order to keep the signal presure at 0.8 bar.
The waste gate closes when the exhaust gasses slow to a point below the 0.8 bar signal threshold.
I hope this is not too simplistic. Once the turbo is spooled it doesn't take a lot of exhaust flow to maintain 0.8 bar.
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RarlyL8 Motorsports / M&K Exhaust - 911/930 Exhaust Systems, Turbos, TiAL, CIS Mods/Rebuilds
'78 911SC Widebody, 930 engine, 915 Tranny, K27, SC Cams, RL8 Headers & GT3 Muffler. 350whp @ 0.75bar
Brian B. (256)536-9977 Service@MKExhaust Brian@RarlyL8
Old 05-10-2007, 06:15 AM
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