Brake Bleeding - the PW way
05-08-2005, 08:28 AM
#1
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Brake Bleeding - the PW way
<ul><li><a href="http://www.audipages.com/Tech_Articles/susp_whls_brake_steer/brakebleed.html">http://www.audipages.com/Tech_Articles/susp_whls_brake_steer/brakebleed.html</a</li></ul>
05-08-2005, 06:42 PM
#5
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an audio clip of your exhaust would be very nice, better yet
just stop in sometime soon so that I can listen in person!
BMP had a real good deal ($241) on a new Supersprint center resonator on ebay. I grabbed it!
Now just need to score a rear muffler and front crossover pipe.
BMP had a real good deal ($241) on a new Supersprint center resonator on ebay. I grabbed it!
Now just need to score a rear muffler and front crossover pipe.
05-09-2005, 04:50 AM
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The uneven firing order of the cylinders ...
... in each bank of Audi's V8 result in higher exhaust system backpressure than necessary. The crossover attempts to smooth out the pressure pulses by allowing exhaust flow thru both exhaust pipes.
This is the stock H-pipe crossover located between the catalytic converters and the resonator (the 1st muffler).
<img src="http://www.audipages.com/Tech_Articles/enginemechanical/exhaust8.JPG">
This is the stock H-pipe crossover located between the catalytic converters and the resonator (the 1st muffler).
<img src="http://www.audipages.com/Tech_Articles/enginemechanical/exhaust8.JPG">
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05-09-2005, 06:13 AM
#9
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Not a cross-plane, and ...
I assume you mean intake manifold. On Audi's V-8, the intake manifold has individual runners from a single common plenum. With the following motor layout,
1 .. 5
2 .. 6
3 .. 7
4 .. 8
The 90-degree crank of Audi's V8 has a 1-5-4-8-6-3-7-2 firing order. Note that the 8-6 and the 2-1 (wrap-around) are firing cylinders consecutively in the same bank. There's enough overlap between these pairs of cylinders that it causes back pressure with an H-pipe crossover, especially at high rpm's (and the more raucous exhaust note). Some have gone to the X-pipe crossover and found noticeable HP gains (and a smoother exhaust).
<img src="http://www.tyresmoke.net/attachments/246388-173_7311s.jpg">
1 .. 5
2 .. 6
3 .. 7
4 .. 8
The 90-degree crank of Audi's V8 has a 1-5-4-8-6-3-7-2 firing order. Note that the 8-6 and the 2-1 (wrap-around) are firing cylinders consecutively in the same bank. There's enough overlap between these pairs of cylinders that it causes back pressure with an H-pipe crossover, especially at high rpm's (and the more raucous exhaust note). Some have gone to the X-pipe crossover and found noticeable HP gains (and a smoother exhaust).
<img src="http://www.tyresmoke.net/attachments/246388-173_7311s.jpg">
