Boost level's varying in different gears

broke7

Stock IRS Guru
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May 4, 2003
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I have noticed sometimes on 1-4 gear pulls with my car I will see about 12-13psi in 1-2 and part of 3rd. In 4th gear I will see 14psi and 15psi on cold nights until the magic dropoff point at 6000 where it goes south to about 12psi.

Im assuming the higher boost levels in 4th gear are due to the engine being under a bigger load??

Im contemplating the nonslip pulley as well, noy sure of its worth it though. Im seeing good boost, only thing I want it for is for the boost dropping off.
 

trey193

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Jun 3, 2002
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INDIANA
Not sure if a no slip pulley is the answer because I saw several at the Mod Shootout and they had as much belt dust as my car did if not more. There has got to be a way to get these cars to hold boost a little longer!:shrug:
 

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