Thread: Twin Plug?
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911nut 911nut is offline
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Join Date: May 2001
Location: Michigan
Posts: 2,511
Twin plugging gets the flame front burning from two directions at once (because the plug is offset to one side of the chamber) so you get the pressure peak from the expanding gasses to occur over a shorter period of time. The piston will not have as much counter-force on it as it moves to TDC. This in turn allows the ability to run less ignition advance to take advantage of the shorter peak pressure. In the end you gain a little torque. It's something to have along with crankcase main web boattailing, crankshaft counterweight knife-edging and cylinder half-mooning if you want every last bit of power out of an engine.
Paul B.
'91 964 Turbo
Port matched, SC cams, K27/K29 turbo, Roush Performance custom headers w/Tial MV-S dual wastegates, Rarlyl8 muffler, LWFW, GT2 clutch & PP, BL wur, factory RS shifter, RS mounts, FVD timing mod, Big Reds, - 210 lb

Last edited by 911nut; 11-24-2011 at 12:51 PM..
Old 11-24-2011, 12:40 PM
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