What causes that nice burple sound in my exhaust? - 6SpeedOnline

Jul 12, 2006 | 04:26 PM

tthoang1

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What causes that nice burple sound in my exhaust?

This may be a silly question but what causes the burple sound when you down shift into 2nd and then more noticeable into 1st to engine brake? The sound is very noticiable with my GT2 exhaust. TIA

Jul 12, 2006 | 04:53 PM

wross996TT

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You downshift into first? To brake the engine? I would not do this. Don't know about the sound.

Jul 12, 2006 | 05:00 PM

tthoang1

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I've got a tip, and I down shift into 1st just before I come to a complete stop (in conjunction with the brake). Just so I can prepare for the launch.

Quote:

Originally Posted by wross996TT

You downshift into first? To brake the engine? I would not do this. Don't know about the sound.

Last edited by tthoang1; Jul 12, 2006 at 05:04 PM.

Jul 12, 2006 | 07:14 PM

2thfixr

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My guess is that it's caused by excess fuel in the combustion chambers after lifting the throttle. I get a similar sound in my 997S when I lift in a low gear.