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RarlyL8 RarlyL8 is offline
Crotchety Old Bastard
 
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Join Date: Jan 2000
Location: Huntsville, AL
Posts: 13,408
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Design to application is crucial. Too big and lose velocity as stated.
Another design issue is primary length and symmetry. This is also critical to efficiency. Very few headers have equal length primaries.

What are your goals, specifically?

I had a well-know "tuner" tell one of my customers that 1.5" primaries were too small for his 400HP application. I sent him a picture of a 600HP engine using the same exchangers.
LOTS of BS out there. Find an unbiased expert who builds successful systems without being tied to the manufacturer giving the best discount. Goran (beepbeep) comes to mind.
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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 10-14-2008, 12:50 PM
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