View Single Post
RarlyL8 RarlyL8 is offline
Crotchety Old Bastard
 
RarlyL8's Avatar
 
Join Date: Jan 2000
Location: Huntsville, AL
Posts: 13,308
Garage
I wish it were that simple.
As Don stated earlier, header design has some basic assumptions.
Short runners promote fast spool, longer runners promote higher horsepower. Those assumptions begin to blur when you add tuned primaries and a split plenum for the turbo. Now add torque oriented cams and a mid-range split plenum turbo and you have the makings of a torque monster with great driveability and a good top end. Even waste gate location will affect the power curve.
The basic assumptions still apply but the flexibility resulting from mix and match components allows you to buffer the compromises.
__________________
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 11-27-2007, 05:55 PM
  Pelican Parts Technical Article Directory    Reply With Quote #37 (permalink)