YOUR RESEARCH40th anniversary and engine performance upgrades?
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The recent post re IPD plenum versus the Werks 1 prompts the following question. Does anyone have experience with engine performance mods on their 40th? I am a believer in trying to keep things as "stock" as possible but would consider things like the IPD plenum, air intakes etc... Thanks...
you may want to read this, from a UK forum http://www.911uk.com/viewtopic.php?t=60293 not exactly sure how the US engines were configured, I haven't been able to find much
I though all 40th anniversary cars had the X51 engine package. The list below is from the 2004 Order guide, but I believe it also had a different plenum (perhaps part of the revised intake manifold). I would be careful about putting intake or cpu mods designed for a standard 996 on an X51 engine, you might end up undoing some of the X51 goodness... Free flow cats would probably help, at the expense of noise. Maybe focus on sharpening the handling? X51 Carrera Power Kit, 345 HP Includes modified cylinder heads, camshafts, exhaust manifolds, control unit, additional central water radiator, and aluminum intake manifold.
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