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RarlyL8 RarlyL8 is offline
Crotchety Old Bastard
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Join Date: Jan 2000
Location: Huntsville, AL
Posts: 13,525
I think the 12HP figure generally comes from dyno runs of stock mufflers vs free flowing mufflers. That is about the same figure I am getting for my new muffler vs the stock Euro. The zork is optimum for free flow so should do at least that good.

The big increase is not measured in the numbers. It comes from the engine being more free revving and more crisp on boost. The engine reponds better in every way when not stopped up by a muffler. That characteristic was my aim in the design of the new muffler as well. It comes close without all the noise.
RarlyL8 Motorsports / M&K Exhaust - 911/930 Exhaust Systems, Turbos, TiAL, CIS Mods/Rebuilds
'78 911SC Widebody, 930 engine, 915 Tranny, K27, SC Cams, RL8 Headers & GT3 Muffler. 350whp @ 0.75bar
Brian B. (256)536-9977 Service@MKExhaust Brian@RarlyL8
Old 07-25-2007, 04:56 AM
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