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copbait73 copbait73 is offline
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Join Date: Nov 2003
Location: Chesterfield IN
Posts: 1,316
A couple of statements I must take on:

“Equal length headers yield better off-boost performance but IMO it's hardly worth the effort since a turbo engine spends so little time off-boost.”

Really, you must be something to see in traffic or is this statement based on driving strictly on the racetrack? If you reflect on normal driving you will notice you are on boost maybe 10% and full throttle much less. What does your engine like best off boost, equal length or something other?

“Must reduce volume in the exhaust”…….

The words that best describes what a turbine desires most is no expansion before reaching the turbine followed by maximum expansion through the turbine. In real terms, the difference in volume causing boost delay between equal length systems and Other is mice nuts when you look at the sweep volume of 3.3L at 2500RPM.

Dynos are great tools however their readings will never guarantee who reaches 100mph first.
Old 01-09-2010, 09:45 AM
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