Another newbie question...I have seen several posts saying that 2002 airbox is supposedly better then the 2001. Is this true and if so is it necessary to replace it with an aftermarket one? I am sure the aftermarket one would be better but how much better and is it worth the extra money? (Already planning mods without even haven taken delivery :D ). Thanks for any imput :cheers:


[Modified by WWK888, 3:36 AM 3/12/2002]


[Modified by WWK888, 3:37 AM 3/12/2002]

 

I feel the same, I put one on my '02 coupe!

 

An aftermarket intake system like Hall Tech Sidewinder or Donaldson will give you much better gains the the 02' lid. :)

 

Corvette Fever Magazine did a test and said that if you get the '02 airbox, you will also need the '02 MAF sensor in order to really get the extra power you're looking for.

 

Mark, An open lid helped so an 02 cover will allso over a stock 01 cover.A Small real gain, is better and less expencive than bogas big one's.JMO Ric

 

Before our '02 Z06's I used the Vortex Ram Induction by Breathless Performance and found it to offer the best bang for buck of all the aftermarketeers. I'd either use '02 lid of go with the Vortex. Good luck.

Cheers,
VetterMan

 

It's all about making the car suck it fresh and blow out fast.

-Jeff Nation

 

I believe their reasoning behind that is because the '02 has removed the MAF screen that GM deemed unnecessary due to the relatively straight airflow of the C5. The '01 and prior MAFs are also used in pickup trucks with the LS1 engine, the screen is necessary because they have an elbow joint in the air ducting that causes turbulence, I believe.

When installing the '02 airbox, just carefully pull out the MAF screen as well, the screen restricts the airflow by about 25%. I have my screen on my desk here at work, I use it as a coaster on top of an old CD!

imp.

 

So let me clarify my question...if I have a 2002 Z06, should I bother with an expensive aftermarket airbox or is the stock one good enough? Thanks for any imput...

Bill

 

On 97 to 00 LS1 replacing the 02 LS6 lid over the stock unit adds a kick. Actual HP gains vary, but a few weeks ago someone Dyno'd their 01 stock and with the 02 lid and found 14 HP. That doesn't sound typical but no LS1 is the same. Some respond better than others.

For $45 you can't go wrong. If it only adds 5 HP to your car that works out to $8 per horse.

Tom

 

I have not dynoed mine yet. But, I would be willing to bet that the stock stuff with just a K&N filter in the stock box does about the same has a after-market complete intake. There comes a point where the TB in the restriction. Also, you can calculate what the engine actual needs, and you don't need to flow more than that.

Here's an link that talk a little about. I know it's an impala link but still valid. http://w3.one.net/~rcheek/impala/faq...%5Fbody%2Ehtml

Rick

 

hmmmmmm???!!! :confused: :D :chevy :seeya

 

I have made both modifications, airbox cover and MAF screen removal, and have had no problems with it under regular use and taking it to the track. I have a 2001 Z06 (LS6 engine) though, I have heard that the LS1 may experience surging, but I can only speak from my experience.

imp.

 

There is a school of thought, which I respect on fundamental grounds, that believes less restriction is desirable, not necessarily more "air".

More "air" is only good if it is accounted for by the MAF, thus the PCM.

It is thought by some, that I believe know what is what with LS1/LS6 programming, that some intake mods that greatly vary the intake/outlet side of the MAF lead to a lean condition that is not correctly metered by the MAF.

I'm much interested in reduced restriction without having to deal with the ramifications of unmetered air that is only recognized by the O2 sensors.

What is up at WOT is what is most important in many racing situations of a drag racing nature. What many increased volume intake makers rarely address are the metering issues that can and usually will arise. Surging is just a part of it that most folks can relate to.

In short, the 2002 lid is an improvement due to reduced restriction, but the path doesn't change.... so gains are not offset.

The the '02 exhaust works due to reduced restriction, the path is freer, not larger... the removal of the screen in the MAF required a PCM tweak... there's a pattern here if you really look closely.

There's more to getting the most out of an engine than feeding it all the air possible as the modern systems rely on seeing the air accurately in order to function as we'd like.

The increase in air will be spotted by the O2 sensors and the PCM will adjust.... but that's not the end of issues that can arise with just going for increased air rather than decreased restrictions. WOT ignores the O2's... there's an issue waiting to happen.

I'm not gonna go way into this, because I believe folks will buy what they want to. They might even spend more money on another mod to make the first mod work... just research and remember restriction reduction is usually beneficial and rarely counterproductive on the induction side, unmetered air induced will be an issue, count on it.

There are gains, just don't go two steps forward and one step back in the process.




[Modified by 1fastdog, 7:02 PM 3/13/2002]

 

I think you are spot on about the PCM. I'm going to use the '02 lid and remove the MAF screen and your correct in that I won't realize all the potential without some minor mapping of the PCM. What do you think about a '02 PCM. :chevy

 

1fast, BRAVO!!!to all you said. Ric

 

Yes, 1fastdog is correct...for the grass to grow, some rain must fall. To every Ying, there is a Yang. :p: :yesnod: :D