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Old 11-28-2012, 05:22 PM   #2
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Join Date: Aug 2009
Location: Ontario Canada
Posts: 678
My Ride: 1999 328i
Do the valves not close as you rotate the engine? They must or they would be bent. Given that the firing order goes from 2 to 4, it makes sense that they would both have their valves open to some extent at the same point in the cycle.

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1999 BMW 328i (Daily Driver) - m54b30 intake manifold, ebay headers, Rebirth Motorsports CAI, Rogue Engineering underive pulleys, Epic Motorsports Remote Dyno Tune, Custom 3 inch exhaust with Burns Merge, Schrick 264/248 Cams
1967 Buick Skylark - 430 Buick Big Block Swap.

Last edited by jared_wiesner; 11-28-2012 at 05:32 PM.
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