Quote:
Originally Posted by icarp
Brooke, those P to V clearance numbers look fine to me , I have run closer but that is with
comp valve train , light weight pistons , comp rods , you get it, know your parts.
I would run what you have , the cams will work well for you .
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This is basically the conclusion I have come to. I’m running a stock 964 long block, so I won’t be revving past 6,800 rpm (at least not on purpose) and should not be pushing the valve train too hard.
It will be interesting to see what these feel like as they will only clear when timed to the roughly 3.00mm (0.12”) setting, which is about 0.5mm shy of “optimal” timing. This theoretically should favor the top end a little more, but that is what I want anyways. I do not expect these to be lacking in the midrange regardless. Also, I don’t think there are any other timing options without bigger valve pockets or shims under the cylinders.
I consider this a worthy experiment to document for posterity. We’ll see how well it works.