Thread: First stroker build
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05-17-2012 06:49 PM #4
You cannot intelligently choose a camshaft for a motor until you have figured the exact static compression ratio. The SCR must match the intake valve closing point if you want to do it properly.
I know most of you fellows don't understand this and that's why we end up with so many of those "I installed a hot cam and now my car is slower than it was".
The camshaft by itself will not improve performance like you think it will, unless it is matched to the intake valve closing point. Here's a chart that I wrote for the wiki on another forum, maybe it will add to your knowledge.....
http://www.crankshaftcoalition.com/w..._compatibility
Other thing is, it seems a shame to use those old tech heads. Here's a set of cast iron 200cc intake runner heads from Racing Head Service that I would use on a 383. Less than $1000 for the set, ready to bolt on. You'll have close to that invested in those older production heads by the time you have them magnafluxed for cracks, new valves, seals, springs and retainers, milling and drilling for guide plates and screw-in studs, precision valve job and cutting the exhaust seats out of the heads to install hard seats for unleaded gas.
RHS, Pro Action Cast Iron Chev SB Head, Stage 2, Pair-Competition Products
I didn't know Pat McCarthy had heads for sale at that price....look into them....Last edited by techinspector1; 05-23-2012 at 01:07 PM.
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I saw last night on fb about John. The world sure lost a great one. I'm going to miss his humor, advice, and perspective from another portion of the world. Rest in Peace Johnboy.
John Norton aka johnboy