Just deflapped the airbox... THIS THING IS A ROCKET!!!
#1
Just deflapped the airbox... THIS THING IS A ROCKET!!!
Don't get over excited, but I seriously think I've gained at least another 25HP or so by doing this.
<b>Special thanks to Scott D. at KTR Performance</b> (Ayer, MA) for cranking this out in just one half-hour! (and he made the "horn" go back on the duct, which didn't seem that challenging after-all)
Proceedure: Remove intake, disconnect engine intake (rubber hose), unbolt and remove airbox, remove flap's horn, remove flap and solenoid, fold line and zip-tie bent-closed, then reinstall and enjoy. Not difficult at all, just be careful or have an experienced Audi technician assist you.
This intake flap is 3.25"... that's huge, over 65% of your overall exhaust diameter. In my humble opinion, it worries me removing it since I feel that Audi knows best for everyone in the end, but overall I'm extremely pleased with the results! However, there's clearly there's some other thought behind why its there and normally-closed in the first place... if it's just noise-reduction then so be it.
Anyway, with the flap out, the engine is more V8-sounding and compliments an aftermarket exhaust nicely. The entire car opened up as expected and, after doing a engine and throttle-body readaptation (VAG-COM ready), driving 40 miles or so, then really taking the car out for a spin... <b>I was setting ASR off in the car just by flooring it in 1st... that's how powerful this car is now. One press of the ESP button (no don't hold it down!!) fixed that problem.</b>
Part of this may be my free-flowing, modified Milltek exhaust... (<b>I do not recommend doing this without an aftermarket exhaust as you may run overly rich.</b>) but I'm really proud of my car now. I'm debating switching from H&R sport springs to the more reliable Stasis setup at some point in the Spring.
I will dyno the car again soon, but my "butt-dyno" reports higher numbers and a more-fun driving experience. This thing is crazyyyyy!!!!!
<img src="http://img225.imageshack.us/img225/1826/dsc00990gg1.jpg">
<b>Special thanks to Scott D. at KTR Performance</b> (Ayer, MA) for cranking this out in just one half-hour! (and he made the "horn" go back on the duct, which didn't seem that challenging after-all)
Proceedure: Remove intake, disconnect engine intake (rubber hose), unbolt and remove airbox, remove flap's horn, remove flap and solenoid, fold line and zip-tie bent-closed, then reinstall and enjoy. Not difficult at all, just be careful or have an experienced Audi technician assist you.
This intake flap is 3.25"... that's huge, over 65% of your overall exhaust diameter. In my humble opinion, it worries me removing it since I feel that Audi knows best for everyone in the end, but overall I'm extremely pleased with the results! However, there's clearly there's some other thought behind why its there and normally-closed in the first place... if it's just noise-reduction then so be it.
Anyway, with the flap out, the engine is more V8-sounding and compliments an aftermarket exhaust nicely. The entire car opened up as expected and, after doing a engine and throttle-body readaptation (VAG-COM ready), driving 40 miles or so, then really taking the car out for a spin... <b>I was setting ASR off in the car just by flooring it in 1st... that's how powerful this car is now. One press of the ESP button (no don't hold it down!!) fixed that problem.</b>
Part of this may be my free-flowing, modified Milltek exhaust... (<b>I do not recommend doing this without an aftermarket exhaust as you may run overly rich.</b>) but I'm really proud of my car now. I'm debating switching from H&R sport springs to the more reliable Stasis setup at some point in the Spring.
I will dyno the car again soon, but my "butt-dyno" reports higher numbers and a more-fun driving experience. This thing is crazyyyyy!!!!!
<img src="http://img225.imageshack.us/img225/1826/dsc00990gg1.jpg">
#7
btw, part of the perceived boost may be related to the ECU reset.
but there's definitely a big difference in MAF with the flap open.
a word of caution: I initially disconnected and plugged the vacuum hose to the flap actuator (as it sounds like your tech did)...car ran fine for a day, then went into limp mode. In the process of troubleshooting, I discovered another problem that may have put the car into limp mode (the air horn on the TOP of the airbox popped off and was sitting on top of the air filter), but I reconnected the hose to the flap actuator anyway (minus the flap), and the car has run fine since then. So I don't know if there is an issue with the hose being disconnected or not, but thought I would share that info.
a word of caution: I initially disconnected and plugged the vacuum hose to the flap actuator (as it sounds like your tech did)...car ran fine for a day, then went into limp mode. In the process of troubleshooting, I discovered another problem that may have put the car into limp mode (the air horn on the TOP of the airbox popped off and was sitting on top of the air filter), but I reconnected the hose to the flap actuator anyway (minus the flap), and the car has run fine since then. So I don't know if there is an issue with the hose being disconnected or not, but thought I would share that info.
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#9
Reconfirms my original notion. Now....why the F* can't some tuner do it !!!!!
A COMPREHENSIVE SYSTEM including intake mod, DP, cat-back and a hardware specific ECU tune will get good gains. I do believe such a system would sell well. Package it up, sell it for $5k for a real 40 hp gain. I'd buy it.
#10
Could be. But easily tested in a 4-way test
1) Log MAF and acceleration in baseline run.
2) Reset ECUs and log MAF and acceleration.
3) Remove air flap and log MAF and acceleration
4) Reset ECUs and log MAF and acceleration.
With the increased air flow with the flap removed, I'd imagine that resetting the ECU is necessary to quickly get the engine to pull more timing advance.
2) Reset ECUs and log MAF and acceleration.
3) Remove air flap and log MAF and acceleration
4) Reset ECUs and log MAF and acceleration.
With the increased air flow with the flap removed, I'd imagine that resetting the ECU is necessary to quickly get the engine to pull more timing advance.