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proffighter proffighter is offline
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Join Date: Aug 2007
Location: Switzerland
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Originally Posted by totle View Post
Hi Roland,

I have a set of custom Marco Manzie headers. Guess it is the same issue.
Do you run with 1.1 bar now?
No, I have RarlyL8 headers. Same issue before with Schnell (similar to OBX or something Chinese) headers


You're absolute wright, but I don't like to talk from improper design as almost all performance headers from cheap to very big $ have this behavior.

To be honest, I think the design of those headers is actually better. Why? Because spring rate and manifold pressure are the relevant factors for boost level. If you reach higher boost with same spring, then it can be due better flow or too narrow wastegate circuit. When you look at RarlyL8 headers, then I don't think there is lack of size there, so higher boost is caused by better effectiveness

930 Turbo '81 Too many modifications to list
Old 07-19-2011, 11:38 PM
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