Exhaust valve mod with reflash
10-07-2008, 02:15 PM
#1
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Exhaust valve mod with reflash
out of curiousity, how would plugging the exhaust vacuum line mod affect driving characteristic of an RS4 with a reflash?
Deceased/Increased low/mid/high-end power/torque?
Decreased/Increased engine response?
Louder exhaust levels?
No effect?
Now, how would deflapping the airbox affect the performance of the RS4 with a reflash and the exhaust valve vacuum mod?
Deceased/Increased low/mid/high-end power/torque?
Decreased/Increased engine response?
Louder exhaust levels?
No effect?
Now, how would deflapping the airbox affect the performance of the RS4 with a reflash and the exhaust valve vacuum mod?
10-07-2008, 05:50 PM
#4
I believe someone here posted a dyno that showed a 7-9hp gain by removing the power flap.
This gain might not be realized on the stock exhaust though. I also can't recall if he had a chip or not.
The exhaust valve mod is purely a sound thing.
The exhaust valve mod is purely a sound thing.
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10-08-2008, 01:40 AM
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oh heck, I'll leave it alone then.
Was hoping for better throttle response and maybe more low and mid range pull 
And unless i've read the How-To wrongly, the intake flap mod is going to result in my airbox taking in sand and flies and bypassing the panel filter directly into the engine...
And unless i've read the How-To wrongly, the intake flap mod is going to result in my airbox taking in sand and flies and bypassing the panel filter directly into the engine...