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Registered
Join Date: Jul 2015
Location: Jacksonville, Fl
Posts: 1,260
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Quote:
Originally Posted by Steve@Rennsport
My experience on the dyno is that a crossover, whether its a common inlet muffler or a separate pipe, makes a significant improvement in mid-range torque without a HP penalty.
Positioning as well as diameter is critical.
I've seen this effect on everything from 2.0 to 4.0 engines since 1976.
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Would you see a similar effect from 2 headers feeding 1 muffler? My 996TT has 2 mufflers and a X-over pipe....my 3.2 and 3.6 have headers into one muffler (3.2 Fabspeed, 3.6 B&B).
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Chris - Insta @chrisjbolton
1975 911s Insta: @911ratrod steel wide body, 3.6 conversion
1989 911 Carrera 25th Anniversary Ed (5th from the last car to ever leave the original Porsche factory assembly line)
2001 996 Turbo - ~54k miles
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