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RarlyL8 RarlyL8 is offline
Crotchety Old Bastard
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Join Date: Jan 2000
Location: Huntsville, AL
Posts: 13,556
Along with the earlier onset of boost, the after market "shorty" headers ala B&B have been documented on the "other" forum to produce an additional 100 lb foot of torque over the factory system on the dyno at 3000 RPM.
You have to be mindful of how that is interpreted. This may be a true statement but it would not be a true statement to simply say that headers add 100 #/Ft of torque. They do not. What happens is the same torque curve begins lower in the RPM range. Of course that translates to an earlier boost threshold which a lot of folks prefer.

Header design most definitely affects performance. That is not an opinion but a fact. The most glaring example that we are all familiar with is the USA vs Euro 930 heat exchangers. The '78-9 Euro 930 is rated at 300HP while the USA version is rated at 265HP. The major difference is the headers/exchangers. That is the #1 upgrade I suggest to folks who have the US system.
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 01-03-2009, 10:47 AM
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