Pulley Drops - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


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Old 07-13-2006, 11:55 PM   #1
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Default Pulley Drops

I am at about 5800 ft. here in Denver. Rumor has it that a smaller pulley can be run at higher elevation (that has not been the cast with my L67 SII GTP). I just put an intake on today (warm air w/KN) and I would like to know what drop on the 94-95 SI L67 is doable wtih colder plugs, exhaust, intake, 180 therm and NO Pcm work? I realize that PCM work is favorable, but I just want a safe mod to get me a little more power.

ZZP'* website says that a 2.7 is a safe drop from 2.85. Pulley Boys says you can get away with more. What has your experience been.
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