Can oversized valves be used with pro1s? I was reading on it and skunk2 doesn't recommend it. Just curious to see what people are using for set ups as far as valve size and cam combo. Also if pro 1s cannot be used what is a good cam for an oversize valved head? This is a turbo car by the way. Please just helpful info is needed. I tried searching old post and nothing came up. Also if pro 1 can be used with over sized vavles. Would the clearance have to be set the same? Thanks guys

 

need info guys please help

 

Just as an example, here's a safety chart for a set of pro1's in a 84mm bore SFWD motor. The pistons were not OTS items and the valve reliefs were spec'd larger. Cams were degreed in to +2 IN / +5 EX. All of the other information is in the chart. I did the P2V clearance as well, but it's not documented. We only ran the test at the degreed in cam settings because we weren't going to change it. The clearance was well over .100".


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