After so many mods I've given up on claiming I can actually tell this or that.
Agree w/johnspeed it just makes sense. I've had the box and snorkle for some time....BTW an OE rubber seal works fine on the left snorkle....snugs things up and matches right.
Only issue I have w/the kit is the rear anchor 'L' bracket is a bit light weight and engine vibration will eventually snap it......I've shot the question to Vivid whether replacements can be sourced.

 

I can get you a new L bracket no problem. Just PM me your address.

 

Great service......thanks.

 

The point of increasing inlet area or airbox volume is to reduce static pressure drop at the turbo inlet. Obviously keeping temps close to ambient via ducting is a plus as well. I'm not sure I buy the whole "forcing air into the airbox at speed" thing. With the 996tt wing deployed, there sould be a lower pressure region at the engine cover louvers. I'll try the old yarn test on my car to see what's going on.

FWIW, AMS independently tested this airbox and saw a 0.5psi increase at the turbo inlet and a corresponding ~10hp gain at the 600rwhp (dynojet) level (running the same boost level). https://www.6speedonline.com/forums/...ml#post2768961
IMO, that's in the noise for a DJ (1.6% change) and would make this an aesthetic mod for most. Pretty though!

 

Yes,I wish they would come out with a heavier bracket...Theirs have broken a few times and I had to order new ones........Also IMO,I can not believe that this air box of mine,Vivid, increased .5 boost...I did not see it on my car and I pay attention to everything I do .You have an airfilter,no matter what kind,that would stop any pressure forced into that airbox within reason.Try taking an air filter and blowing air pressure threw it,,and that pressure would be still alot more then generated buy our back end dynamics...Plus before the air gets to the turbos,there is a lot of piping to slow it down.......Just my thoughts

 

We offer a LIFETIME Warranty on all Agency Power parts. See here - http://www.agency-power.com/catalog/warrantyform.php

 

I'm talking about pre-turbo head (pressure) losses, not boost pressure. Boost pressure should remain the same, but with less head loss, the turbos will have less work to do to pressurize the air to some target boost level. This will result in a more efficient air compression (less Tout) and more power. And no, an airfilter doesn't "stop pressure", but it does have a pressure loss associated with it (the smaller the better). A higher pressure pre-filter will result in a higher pressure at the turbo inlet (the goal of a good airbox).

 

Hi,Sorry to disagree with you BUT try to blow air threw a air fliter an you will not get alot of that pressure threw it...The advantage of the bigger surface air filter area is that it can PULL more air threw it easier and hopefully have more cool air on that bigger area.....Just like motocycles pressurized air boxes,,at low speed they can not help push air threw a filtered system,for the same reason,,,To work it takes a high rate of speed,over 100mph at least to start help and that goes straight into the intake track.I know this for a fact because I have some experience in this area,for what its worth here......Thats also alot more pressure then the air pressure that is coming over decks and into the engine compartment.......Everyone has a right to there opinion and we all try to give helpful info to each other on here...Its all good....

 

Semi-technically speaking, high seeks the low and direction is irrelevant. The filter is just a restriction that manifests as a drop in pressure as fluid goes across it. As far as fluid motion is concerned, pressurizing one side will have the same effect as applying vacuum on the other (i.e. the fluid will move if it can overcome the filter losses). The issue I think you're getting at is that creating positive pressure in the airbox on a car with an engine at WOT takes a substantial amount of air being forced into the box (high dynamic pressure).

As I hinted at earlier, you've introduced a substantial dynamic pressure component into the mix now. This is what vivid seemed to be implying happens to the 996tt airbox with air being "forced" in, which I disagree with. I agree with you that taking advantage of dynamic pressure requires a very dedicated setup (basically a straight shot inlet perpendicular to the airstream) as well as higher speeds.

Anyways, I think this airbox would be a good mod if you're on the ragged edge with your turbos (flashed K16s come to mind) +the aesthetics and maybe sound? and lifetime warranty