12-31-2009, 10:45 AM
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#20 (permalink)
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A True Z Fanatic
Join Date: Mar 2009
Location: Greenville NC
Posts: 2,883
Drives: 370Z Sport
Rep Power: 977
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Quote:
Originally Posted by Minicobra1
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Yeek...More bad info on the internet. I wouldn't put too much stock in either of those 2 links though there is a little truth in the second.
Most cars, due to emissions, now have complete fuel cuts when you close the throttle. This immediate transition to lean will cause the burble and snapping depending on exhaust design and back pressure. On my old ('08) Corvette you could tune this out with software by turning off the fuel cut and allow some fuel and combustibility into the system even on closed throttle. The more even burn did away with the burble and snap/crackle..It was all very tunable. Opening or closing the Exhaust flappers had an impact too.
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