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Discussion Starter #1
for some reason i was thinking that the resonator was part of the tube that went from the MAS to the plenum. but i was just looking at the engine docs and it looks like the resonator is UNDER the intake box.

my stillen inake has a "hole" in the housing to sync up with the pipe at the top of the resonator. should i have removed the resonator completely? what is this part accomplishing?

thanks

brad
 

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That is another resonator in the system in addition to the ones on the tube. It is for sound suppression, same as the others. With the Stillen intake, it accomplishes nothing. The only reason that hole is there is so it mates up with the resonator in the G35 (so you don't have to take it out), but it still doesn't do anything b/c the Stillen doesn't use a closed box. You don't have to take it out, if you don't want, but I DID remove mine; useless fat.
 

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You have the same term with somewhat different applications.The resonator/muffler in an intake system is to quiet that hiss or drawing air noise.Does not seem to cost power,but it may disrupt the air.
The resonator or pre-muffler as some of you have called it is to take some of the harshness out of the exhaust noise.Lots of MANU tune the sound more than they tune the exhaust for power...whatever.I take those off..dded weight and I tune with muffler choice.
 

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brnjugfx45 said:
You have the same term with somewhat different applications.The resonator/muffler in an intake system is to quiet that hiss or drawing air noise.Does not seem to cost power,but it may disrupt the air.
The resonator or pre-muffler as some of you have called it is to take some of the harshness out of the exhaust noise.Lots of MANU tune the sound more than they tune the exhaust for power...whatever.I take those off..dded weight and I tune with muffler choice.
Can't argue with that, but no one's talking about exhausts here. The act of the resonators in the inatke path disrupting the airflow DOES cut power. Just swapping our intake tube for the Z tube nets 6RWHP. This was dyno proven on a G35c.
 

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help dave today to find HIS 6RWHP, it seems to be lost.
 

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No kidding! :roll:
 

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Just swapping our intake tube for the Z tube nets 6RWHP.

Are you ready for this...According to Stillen the z-tube is only worth 0.5hp over the stock piece which is why they did not make that piece.In the market place,if they could have money on this they would have...interesting!!!
 

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That IS interesting.

Watch for the Injen thread soon. There's a bit of interesting info re. the tube in this story as well...
 

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Discussion Starter #9
in all honsety , i think that if you couple an intake, z tube and a new plenum, then you'll get some mild performance increase.

i have just a z-tube and an intake and dont notice a thing really (performance wise).

so why did i install it? .....

(1) becuase it was fun to do :)
(2) becuase the intake makes a neat pssssp sound around 3K RPM
(3) becuase the Z-tube makes a cool growl when you wail on it!

i am going to put a plenum in in the spring for the purpose of :

(1) having more fun :)
(2) seeing if i get a bit of easier breathing and some performance gain lower in the RPM range.

:D
 

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The plenum won't really give you anything in the low end (it won't take anything away, either); it WILL, however, REALLY open up the top end and make the car feel much faster overall. If you want more low end, I'd suggest the pulley and high flow cats.
 

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Discussion Starter #11
if you do high flow cats, would you also need to do a cat-back exhaust as well.

what kind of gain does this give you?
 

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No, you can use them with the stock exhuast. The cats do the most for you in the low-midrange with added HP and torque. I don't recall how much; you'd have to look up the dynos on My350Z, but I seem to recall the gains being in the 8-12 HP/TQ range.
 

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Virtually all the CAT guys talk about how much more will be gained when you do both...hi flow cat and exhaust
 

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Yes, but it isn't absolutely neccessary; you may get more from them if you did the exhaust as well, though.
 

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It is not a may..you will!
 

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Ok, I'll give you that one. My point was that you don't HAVE to. You'll still get gains just from the cats, just not as much as you would if you coupled them with an exhaust. My personal plan is to do the cats and Y-pipe and keep the rest of the exhaust stock. The Y-pipe is where most of the gains are to be had in the exhaust.
 
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