Is it me or is the Crawford V5 Plenum kinda loud. I love the noise generated by my stock exhaust and Nismo CAI. But the plenum make a sort of sucking sounds that makes me cringe.
I don't think I have a leak because it never stalls out, but dyno butt did not notice any performance gains from this mod.

Or can it be the lack of engine cover.



293707-RATLogo.gif

 

I added the cats and intake first. It was too loud before I added the plenum and after the plenum it quited down the car by quite a bit. I'd suggest adding cats or straight pipes to get the hp/tq gains and maybe, just maybe it would help with the sound.

catatatatatatatafish did the install in the same order you did, maybe IM him as to what his opinion is.

Good Luck...

<font color=blue>The above statements are only my take on the issue. If you disagree with anything I typed then you are 100% right!</font color=blue>

 

neff, I guess I followed your lead with the sequence of installation. My order was based on the fact that the cats were readily available while I had to sit and wait for the new V4 kinetix plenum to be made. I don't think my car got any louder below 4k rpms, however I do think I can hear the growl more at higher RPMs than I did before. Since I now don't carry the infiniti engine cover anymore, that also adds to the noise comming from the engine bay. Regarding performance, my G has now completely transformed into a beast. Doing just cats or plenum is worthless IMO. You have to have the combo to realize the potential of both as my friend catatafish had pointed out before.

2004 G35 Coupe/OB/Graphite interior/Premium and aero package/Popcharger/Z tube/Hotchkis sways/Tein H-tech springs/Kinetix plenum/Crawford cats

 

I just ordered the B-quiet hood liner in attempt to quiet down the gurgling from the Kinetix I just installed....another member praised this product. I will let you guys know the results.
I guess now I need the cats....may go with the resonated test pipe group buy from Kinetix. I don't think the plenum did much by itself, either.
My car sounds like a 6 cyl. F-body with a bad muffler...less than inspiring to say the least.

 

Let us know about the fit/finish/performance gains from the Kinetix straight pipes w/ resonator. Sounds like a cool product. Hope it works out well for you

<font color=green>-Rambo</font color=green>
G35c-6MT-DG/Willow/HyperGround/BorlaExhaust/350Z-intake/AVIC-N1-double-din

 

If doing the plenum without the cats doesn't help, I won't be getting the plenum.

Replacing cats is a felony (so I've heard), unless you only drive it off road..


2004 G35C 6MT Black. Killer.

 

yeah but who cares about the law!

"What if there is no tomorrow....There wasn't one today!!!" Bill Murray

<font color=purple> WRAH ~Scored with G35Girl!!!</font color=purple>
'04 OB/GL Prem.Pkg./Sport.Pkg/Splash

 

no you can replace the stock cats with performace or Hi-flow Cats but Straight pipes or Test Pipes are not street legal

 

No one will ever know if you changed your cats to high flow cats. (Straight/test pipes are a different matter)

How would anyone in law enforcment (a.k.a. city revenue generators) find out? Most aftermarket cats don't look any different from the stock ones. It's not like some uneducated $30,000 a year meter maid (cop) is going to figure it out.

 

That is incorrect, SuperRacer. The only legal reason for changing the cats is if the stock cats are damaged. However, you have to replace it with another factory cat. Aftermarket cats are explicitly illegal.

 

i think of it this way.... if i get caught for something illegal with my car that is a felony... its gonna be one of those 140 mph speeding tickets that i get arrested for.... not my freakin cats.

2004 Black on Black g coupe 6spd.... aluminum pedals, clear corners, z tube, and pop charger. soon to have 19" volk gt-c's and PIAA xtreme whites in the clearance and corners
Houston Texas

 

<blockquote><font class="small">In reply to:</font><hr>

If doing the plenum without the cats doesn't help, I won't be getting the plenum.

<hr></blockquote>
You've only bad mouthed the construction of the plenum since we installed mine at my house. In the last week all you've said in plenum related threads is that you will NEVER install a plenum unless and until a better solution is released. You said you didn't like the warpage and cracking issues, remember?

<blockquote><font class="small">In reply to:</font><hr>

Replacing cats is a felony (so I've heard), unless you only drive it off road..


<hr></blockquote>
It's not like you haven't been convicted of felonies before in your car, geesh Mother Teresa lighten up. (Actually I made this last accusation up as I was typing, but you all get the point, right?)

<font color=blue>The above statements are only my take on the issue. If you disagree with anything I typed then you are 100% right!</font color=blue>

 

1) I installed the intake, then plenum, then cats. After the plenum, I noticed a deeper, slightly louder sound. I also noticed an increase in performance. However, when I installed it the first time there was a terrible whistle due to air leak. When I torqued it down more, it seemed to stop the whistle but my QM times were lower. When I got the non warped plenum and installed it, I noticed fuel smegma collecting in one corner and leaking through the gasket. Air leak explains my diminished performance. Once I got the flat plenum, she rode like a top and my QM times were back and improved.

2) The Clean Air Act of 1970 lists the infractions. It also lists the punishment. Nowhere that I could find, did it say Felony. I read the whole thing and I started skimming, but best I could tell it lists the CIVIL penalties that we are subject to. The civil penalties can range from up to $2500 per day for a user like us installing one and $25,000 per day for someone selling a vehicle knowingly with the emissions tampered with.

A Felony is:
FELONY - One of several grave crimes, such as murder, rape, or burglary, punishable by a more stringent sentence than that given for a misdemeanor; an offense punishable by a maximum term of imprisonment of more than one year. 18 U.S.C.

An offence which occasions a total forfeiture of. either lands or goods or both, at common law, to which capital or other punishment may be super-added, according to the degree of guilt.

(2) Obs. Any of several crimes in early English law that were punishable by forfeiture of land or goods and by possible loss of life or a bodily part. A breach of homage, a violation of the contract between lord and vassal, a violation of feudal customs. The legitimate breaches of the contract included: failure to protect the vassal; refusal of justice by denial of access to the LORD's court; dishonourable conduct towards the vassal.

Many people confuse "Felony" with "Federal" and in the media the terms are used loosely.

Prison and Jail are also confused. Jail is year or less, Prison is more than a year. You can be violated in either, but it won't happen because of your cats so go ahead and pick up the soap.


2004.5 Coupe/5AT/Ivory/Everything but front spoiler/Nismo CAI/Crawford V5/Crawford Cats/ Service Engine Soon

 

Q45tech has me all worried about the karma thing.

Crawford vs Kinetix is like Bush vs Gore.

I voted libertarian.

2004 G35C 6MT Black. Killer.

 

Libertarian? Every working man needs a little Bush, right?

<font color=blue>The above statements are only my take on the issue. If you disagree with anything I typed then you are 100% right!</font color=blue>