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Old June 17th, 2015, 02:54 PM
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TJ's GMC TJ's GMC is offline
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Join Date: Mar 2015
Location: Cave Junction, Oregon
Truck: 1964 GMC 1500 LWB Wideside 305E V6.
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Default Funny question BUT........Shifting RPM Range

So what's a good shifting RPM for my 305? I been shifting at around 3000 rpm but it sounds like its screaming its lungs out. I recently hooked up a tach(hillbilly style) and have been reading my rpms. So far it seems 3k is the best to shift as it keeps from lugging the engine all the time because of the wide ratio tranny. Don't get me wrong...that thing begs to be lugged. But sometimes I like to Go. haha. I made a mistake of giving the throttle to a friend and next thing I new, I saw the tach at almost 5000 rpms.....needless to say he was booted out of the driver's seat in a heart beat.
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"Excuse the rust I use my truck"
1964 GMC 1500 305E/sm420 4 barrel intake mod and dual exhaust.
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