Thread: 181-Pulley Fact, Fiction or Matter of Opinion?
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Old May 22, 2008 | 06:22 AM
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From: From North TX..To SoCAL..Now Cnt Philly
Default 181-Pulley Fact, Fiction or Matter of Opinion?
To remain consistent with my “mod baseline” research; I patterned this thread title after SL55 Setup Fact, Fiction or Matter of Opinion?. Pulley/ gauge were installed yesterday and weather permitting, I will hit the track today making three passes to obtain numbers. I put about 50 miles on it last night driving normal (daily), moderately (quick acceleration), and hard (WOT). The car was already fast so my butt dyno has not changed and I need numbers to tell the story.

Side note:
My gauge is a combo that reads boost and A/F, let me know what you think about my readings.
  • On start up the boost gauge reads –8 to -7 and the A/F starts out optimal, then begins bouncing throughout the lean/ optimal/ rich ranges.
  • Under normal driving, boost level ranges from –6 to –4. While A/F readings bounces throughout the three ranges, never holding in any range.
  • During moderate driving, boost levels range from –0 to 8 and A/F readings hold slightly in the rich stage, then begins bouncing.
  • When at WOT, boost levels range from 13 to 15 and A/F reading becomes a permit fixture in the rich stage.
  • Any time I remove my foot from the accelerator boost reads –8 and A/F becomes a permit fixture in the lean stage. Once accelerator is reengaged boost level returns to “normal” and A/F starts bouncing throughout the ranges.
 
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