very loud s4 today, it was fun driving around (sound clip inside)
07-02-2005, 10:37 AM
#21
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And one run had significantly less boost than the other two at low RPMs. My guess (m)
is the low boost was the cause of the lower HP/TQ on that pull. I'd have to look at the data to verify.
The point of my post was to draw attention to a test that shows the reduction in back pressure is an issue to consider.
The point of my post was to draw attention to a test that shows the reduction in back pressure is an issue to consider.
07-02-2005, 10:42 AM
#24
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Piggie, my brother, and I all had (my bro still has) APR V1 loud cat-backs.
Piggie and I chopped the resonators off ours to boot. Piggie also had Milltek DPs with no cats (straight pipes welded in) to make matters worse.
07-02-2005, 11:31 AM
#26
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ATP has a boost-activated dump valve that opens only at a certain boost level.
<ul><li><a href="http://www.atpturbo.com/root/releases/release091004.htm">http://www.atpturbo.com/root/releases/release091004.htm</a</li></ul>
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