Quote:
Originally posted by thevojtiseks
Thanks for all your responses, I'm already off down the lightening track so good advice here. Refererring to the chart in Andersons Book (pg 141) for the 2.4 S Stock v Sport muffler does anybody have a similar chart showing benifits/otherwise for a 2.2 ??? I must admit I'm slightly sceptical about this data - max power at 5500rpm on a 2.4 S ? - seems about 1000 rpm shy ?
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I just saw this thread and can add a little to the discussion. I did back to back dyno testing of a sport muffler and stock muffler on my 2.2S. Sport muffler is definitely better, but nowhere near 10-15 HP worth. See the thread below for the full write up and graphs.
http://www.early911sregistry.org/forum/showthread.php?t=4752&page=3&highlight=k%26n
Brooke