....This assumes your Beetle engine will hang together for more than one spark period at 8000RPM... Yes, there is that :) IIRC Type 1 1600 rev limit is 5700 rpm according to VW, and that's a bit ambitious in my opinion - The stock crank is not balanced across adjacent throws, & will beat out the main bearing bores fairly quickly if you insist= on buzzing the engine. It's pointless, anyway, in a stock engine - Peak torque is ~3700 rpm, and the fan... Well, see "Fan Law". All addressable, of course, but it's not very "stock" w2hen you get done. Jack --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .