Did I make a mistake?Help!!!!

[3BarBoost]

quote:Originally posted by Grandgrandpa

Here's my two cents worth, I have removed the white silencer and have noticed that seat of the pants difference.. Now for the EXPERT opion, Motor-Mike over at DIY has tested the difference and here is his comment .. http://www.ptdoityourself.net/pttechlib28.html#692 So, long story short, the white silencer DOES restrict and that means less HP..right?

Notice he said he tested the part on the naturally-aspirated motor (over a year prior to turbo availability). The turbo air cleaner is not the same.

The reason I am so sure you aren't getting anything - we run the wastegate based on what gets into the intake manifold. You reduce restriction (with your Airaid or K&N - although K&Ns are no better than stock) upstream of the turbo, and we pull back until the same total amount of air gets through the motor.

[SteelBlueGT]

3BarBoost, interesting but how do you explain the HP increase on the dyno??

[turbomangt]

Well, I started a nice thread, however the response seems to be 50/50 whether to leave BOTH silencers out or not. so Iam still in limbo. will the next person please convince me what to do. also, this air aide system, is it similar to PT Tunings GT Turbo air intake? Thanks guys, Gary

[Kirby]

My guess, and it is a guess, is that the seat-of-the-pants HP comes from the ability of the turbo to spool up more quickly with the unimpeded air flow. The HP figures may be even the same, but as we all know it's how quickly you get there that gives our seat-of-the-pants dyno a positive response!

[Beacon]

quote:Originally posted by turbomangt

Well, I started a nice thread, however the response seems to be 50/50 whether to leave BOTH silencers out or not. so Iam still in limbo. will the next person please convince me what to do. also, this air aide system, is it similar to PT Tunings GT Turbo air intake? Thanks guys, Gary

Airaid gets rid of the stock filter and upper portion of the air box. It's made up of a second "box" with no top or bottom that sits on top of the stock box and clips down using the stock fasteners. Also comes with a rubber seal that fits on the top to seal the box against the hood.



PT Tunings looks like (haven't seen one in person) it gets rid of the stock box altogether and replaces the stock tubing, leaving the filter hanging out by itself.

[MichaelDay]

I saw an 03 GT two days ago with the PT Tuning Air Intake. It does replace the stock air box and the tube to the turbo. It has a chrome plate that forms the bottom and rear of an air box and uses a black plastic type material to close the opening over to the battery using a rubber seal similar to the Airaid. The battery, as I recall acts as 1 side of the new airbox with the hood serving as the top of the box. It is not as air tight as the stock airbox but should block out most of the heated engine air while still pulling air from the stock hole in the fenderwell.

[Grandgrandpa]

quote:Originally posted by 3BarBoost

Notice he said he tested the part on the naturally-aspirated motor (over a year prior to turbo availability). The turbo air cleaner is not the same.

The reason I am so sure you aren't getting anything - we run the wastegate based on what gets into the intake manifold. You reduce restriction (with your Airaid or K&N - although K&Ns are no better than stock) upstream of the turbo, and we pull back until the same total amount of air gets through the motor.

Thanks for the information.. I just assumed that the white restriction was the same as the Turbo. So, here's what you seem to be saying, stock is just as good and perhaps better than some of the mods and aftermarket products. Question, does removing the white restriction harm anything? I kinda like the extra noise!!!

Now last question, upstream from the turbo you said, "We pull back until the same total amount of air gets through the motor." What does that mean?

[3BarBoost]

I have yet to see any dyno data showing a performance delta for removing the resonators (good or bad, so if you like the noise - have at it). Transient inertia dynos do show boost response rate by which rpm they achieve low-speed torque. A restriction reduction should allow the turbo to make boost sooner (lower rpm). However, as I said since we run the boost schedule based on mass flow through the engine - we tend to make the same total power no matter what you do in front of the turbo (assuming you don't make the restriction substantially worse). If you reduce restriction, the controller notices that it is over-achieving air flow and adapts for this change. Same thing if you have a dirty filter, it compensates. Even if you climb up a hill, and the air gets thinner - we still make the same power up to about 8,000 feet, then it slowly drops off as the wastegate can't get any more than fully-closed.

All this goes out the window if you take control of boost away from the factory controller. Then if you do manage a less-restrictive inlet (which is difficult), then there will be a performance delta if you run the boost up (assuming you don't hit the 18 psi fuel-cut).

[PTGT Redman]

i took the white one out, left the black one in. Black one is not restrictive per se and helps channel air. gets mighty hot in there. Always pop the hood on it when i park it in the garage at night so the whole bay cools down. Don't want to thermal trash the internals.

[turbomangt]

One last question > I have a cowl induction hood that allows air to flow from the hood would this fact allow me to leave the large silencer out ? since the message I'm hearing is the large one helps to let let in and out of the engine? gary