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Re: 2001 RCSB project
I did a little spearmentin' today. I ran around on the highway in 3rd gear to find the comfortable RPM for a gear change. Anything over 2500 starts to feel "out of the groove" so-to-speak. Not that you couldn't drive around at higher RPM's but the engine noise and fuel consumption are not ideal.
With my current 3.23 gears and 265/50/20 tires (30.5") at 70mph, I'm right at 1750 RPM. With the 3.90's I'll be at 2100. That's a pretty small jump, there is plenty of room to go up to 4.10's.
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'20 Silverado Trail Boss ~ '17 Tahoe ~ '79 K15 Sierra Grande ~ '76 Blazer 2wd ~ '71 Cheyenne swb ~ '55 Pontiac Safari ~'50 3100 bagged ~ '80 Wife ~ Late model kids
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