Join Date: Sep 1999
Location: Vancouver, WA, near Portland, OR
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Re: RV Camshft Selection
Unfortunately, no cam card comes with stock replacement cams. I did find a site that gave stock specs though. For the Buick 181, 196, 231 & 252 V-6's, the duration at .050" lift is 187 degrees for intake and 194 degrees for exhaust. Valve lift of .374" for intake, .384" for exhaust. For the Buick 350 V-8, 191/208 .050" duration and .387"/.403" valve lift.
Remember most all of the builders involved in racing are in tune with what works for racing, but are usually not aware of what's best for general and off-road driving that warrants low-end torque that's fully in around 2500 rpm. The manufacturers did a pretty good job of finding the best of everything for the majority of us and did quite a bit of r&d to come up with it.
'66 Jeepster Commando w/Buick 252/4.1L V-6
'70 Wagoneer w/Buick 350 V-8
'76 Wagoneer w/AMC 401 V-8 (sold)