I've read that removing the power duct (Thing near the air box labeled 'power duct') causes, in the summer, a mild engine temperature increase (~10deg. difference) but gives a better air induction sound and is a good trade-off since you arn't losing anything.

Has anybody done this on their coupe? Thoughts? (supposedly it's good to do if you have a z-tube+k&n.....)

 

good to know........anyone else try this?

 

Hmmm . . . Interesting.

 

indeed......

 

"My Dear Watson" lol

No, I haven't heard anything about this, BUT wouldn't you be "losing" something by having the engine temp go up by 10 degrees? Isn't that a lot?
HP loss?

 

i don't think so. nobody's ever reported noticing or dynoing a loss...

 

yea, the main reason is for the sound apparently ^_^

 

oh well, i'm gona try it tomorrow when i install my z-tube

 

The result is in - https://g35driver.com/forums/reviews/79391-my-review-z-tube-no-power-duct.html

If you have a 350z intake tube, ****ing remove that bitch! I can't believe how loud the exhaust howls now (while still retaining it's coupe sound....make it sound almost like a forged engine)

Even if you want to argue a slight power loss from the engine being +10degrees hotter (no power loss ever proven based on my research), anything you lost you make up for with the z-tube+k&n and is soooooooooo worth it for the sound

....Throw on a spacer and I can onyl imagine (now I wish I were more mechanically inclnided so i could install my MD spacer and see the difference now)

 

Well you intrigued me, so I removed the power duct to see what it was all about (took all of 30 seconds w/ the handle of a screwdriver on the inside of the intake box). Definitely noticed a lot stronger/louder noise from the intake/Z-tube under WOT in the 3K RPM and up range! That was the only audible change I noticed (idle & normal acceleration remained the same, though I do have a sedan & not the coupe, so your sound may differ). Thanks for the tip!

 

technically speaking an increase in engine temperature will cause a decrease in hp, however if other factors of the incoming air change (ie pressure, volume) it may compensate for the loss, 10 degrees however is a minimal change in temperature when compared to the overall engine temperature, so even if there is an effect it would not be noticeable by simply driving the car

 

same comments as above but I have a coupe

 

Sound eh? I rather get a Whistler for the best sound ever.