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Old 06-21-2010, 01:43 AM   #2
Don't let the dog drive
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Join Date: Apr 2004
Location: Kinston, NC
Posts: 1,883
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The boost of the supercharger is dependent on RPM and throttle position. I still have the stock pulley on my car which runs 8 to 10 psi. If you have free flowing exhaust, the boost will be lower due to drop in back pressure. So when you are in the higher gears, 4 -6, the boost will not be as quick to rise unless you are moving above 140MPH. 4 gear is a 1:1 ratio where as the 1,2,3 gears are torque multipliers which will generate higher RPM. The higher the gear the more load you place on the motor, so that will affect the boost gauge to some degree. What you are seeing is normal.
2004 SVT Cobra, Silver, February 2004
SVT Build # 2485 out of 3768
SLP Loudmouth Cat-back
UPR double lock firewall adjuster
UPR GMS extreme double hook quadrant
Wheels: Ford SVT 10th anniv. wheels (track duty)
SVE 10th anniv. style 17x9F, 10x10.5R
BBS RK Plasma 18x8.5F, 18x10R (retired)

(retired) 2001 black SVT Cobra, October 2001
missed but not forgotten
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