Are you refering to me?

Koz

 

No.. not even close silly...

But, I did Quote you and post some helpful info for you (and others) underneath it..

Joe Z

 

I was wondering what was going on when driving the IS-F. When the flap opened it drowned out the exhaust. I wasn't impressed with the IS-F's exhaust sound (which everyone praises). My 350 with the Greddy sounds better!

Koz

 

Just to throw in a little variation on the subject....used my Dremel to cut slots in the OEM box, between and angled to align with the fins.

 

I went over to bimmerfest just to see what they're scheming about over on "the other side" and I didn't find much about boost(at least not on the general forum), but I did encounter this : http://www.bimmerfest.com/forums/sho...d.php?t=294812

Haha, so it seems some bimmer dealers are scouting the forums for perpetrators. Heres a little snippet from the thought patrol going on over there:

- Hi, I'm the general manager, please come with me.
- Have a seat.

Ookay then. I sit down.

- Is your alias c-o-o-n-t-i-e on bimmerfest?

- ARE YOU COONTIE?

I stammer, "Uh.. no." (OK, I wasn't gonna crack on the first question! Once the cattleprods were to come out, maybe then but surely not immediately. Plus, I think I'd be less flabbergasted if he had said, "We have a new M3 we don't need, it's your to keep.")

- Well, we have a reason to believe you are.

Then, he takes out a manila folder and (looking at it upside-down), it's full of my bimmerfest print-outs, certain passages highlighted. He takes a page out.

- It says here you once referred to buying a car at our dealership as "like being sodomized with a broomstick."

Nuff said

 

Nice Work... Great idea.... Looks very clean...

 

NICE TangoC, I bet you are hearing some intake tone after 3K RPM.

 

I was quite surprised at the difference, not overly loud, just a subdued howl .
May be my imagination but pick-up seems to have improved, especially from standing or from relatively low speed. Could it be the intake under the front of the hood is restrictive??

 

No. If this were the case we'd see significant increases from open element type intakes. We do not.

 

I'll just have to trust that the Lexus techies had good reason for the extra intake then...

I had a test drive in an IS-F a few hours after testing my airbox box mod....and had to wonder why I bothered

 

The reason for the extra hole in the airbox on the F-sport intake is so it makes more noise.

A surprising number of folks who drop a ton of cash on aftermarket parts want more noise.

See also some of the crazy-expensive exhaust systems that don't add much else... or any of the open-element intakes that suck in hot air but sure are loud.

 

They're happy to take your money for the belief you have better performance when in fact, you just have more noise.

 

I am going to shave my airbox tomorow (ie, remove the fins). I dont see how it could possible hurt and if its louder then yay. I will not however drill holes in it, just want to make that clear. We shall see what happens.

 

I have one.....

 

I believe the fins are there to even out the air flow over the filter. Removing them will not make the sound any different.