That would be my totally reworked 350Z K&N typhon CAI. It's now a sealed ram air system.

"All that's necessary for the forces of evil to win in the world is for enough good men to do nothing.”
Edmund Burke

G35 6mt

 

Catat, I agree with you.

But if you can tell a 0.1 second difference after a 1/4 mile, you are an alien.

Ambient and track conditions can make an easy 0.5 second difference in 1/4 mile.

Like a CAI or exhaust, buy it because you like the looks or the sound, not for any noticable performance gain.

In my opinion, the looks (chromed on a black G, $600) would be worth it. But not until I get a big screen TV.

2004 G35C 6MT Black. Killer.

 

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

Doing the math, 9 HP will knock off nearly a tenth of a second on a QM for this car.

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Anytime the subject of gains in hp/torque comes up as a result of modifications, it always turns into a very heated debate. I don't question that small, non-intrusive mods like pop-chargers and plenums can and do make gains in performance. But significant gains? No. And it's really not THAT important that they do. Simply put- mods are fun. A Z-tube makes the VQ sound mean under WOT (back in my day [stone age], we used to turn the air cleaner cover upside down so about an inch of the actual air cleaner was exposed- made it sound MUCH meaner even though it probably did very little.)

The only significant gains in hp/torque that can be made with the VQ is through FI, which is costly and potentially explosive. As the old saying goes: if you want to play you have to pay. Better have deep pockets. If you want to really do it right, go buy this:

http://www.aebsracing.com/products.p...ct=vq35stroker

If you want to install a new plenum, or run silly wires all over your engine, or attach a CAI, go for it. My own personal feeling is that you'd be better off putting a really amazing set of wheels on your G and calling it good. Just my 2 cents.

 

I suppose "significant" is defined differently for all of us. And I object to comparing the plenum with grounding wires. I take careful measurements with every mod and I can demonstrate a "significant" difference with the plenum and cats. I found differences between the intakes, but they weren't significant.

I define significant as a change due to the independent variable as opposed to a change of measurement based on chance alone. My device is a G Tech Comp that has variance, but can be controlled for by running multiple runs and controlling for conditions, all of which I do.

The score:

1) intake, no significant difference (changes in the .01 1/4 mile realm)
2) Plenum, averaging about a dozen runs in controlled environment netted almost 1/10th of a second in the 1/4.
3) Intake, plenum, cats - netted almost .15 seconds in the 1/4.
4) 6 wire grounding kit - absolutely no difference in 1/4 mile, 0-60, idle speed, shift times, nothing nada zip. I took them off as they cluttered the bay.

I'm a 1/10th second away from 14 and by the time I put on 18 pound 18" wheels and a Fujitsubo with Y pipe I'll bet my car that I'll be at 14 seconds even or better on a 55 degree day at 400 feet ASL with 50% humidity or less at 29.92 in hg.

Is that significant to you? Maybe not, but it is to me, and it's measureable and the price is right. It fulfills MY mission, but maybe not someone elses. The $6K I've saved as opposed to going FI will go to my new BMW K1200 RS.

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

 

A 55 degree day, WOW! This morning at 5:10am my temperature reading in the G was 76 degrees Farenheit. I'd love to drive my car at ~50 degrees...

<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>

 

Cata that's right, do what you feel you need to do. Not everyone can go FI for many reasons, and ims ure all of us realize simple bolt on mods are giving us hardly any gains at all. But when you eventually go FI if you do and put some mods on (exhaust,cats) and a few others it multiplies the gains on a FI car. Our car or the VQ wasnt designed obviously to be highly tuned without some serious money, but then when dropping serious money 7g's for a turbo kit like PE whihc is giving you 400 at the wheels, from that point on your car will be a beast! Its money and preference, the only regrets I have of dropping my money in my car with bolt ons isnt because I know I wont get a second off my times lol, its because its a leased car =) Pisses me off. Martin


Martin
2003.5 BS G35
Nismo Aero/Sport Package
Injen CAI
B+G Springs
ADR M-Classic 19's..

 

"I'm probably going to get flamed for this but... "9 peak horsepower", for roughly $350. Umm.. My lawnmower produces 9 hp. And it weighs in at about 15 pounds. How, exactly, does a 9 hp increase on a 3,000 pound car affect anything? Given the weight of the vehicle, an increase of 9 hp would be.. nothing?? If I'm wrong, I'm wrong. But the math, guys.... be realistic."

Dabur I totally agree with you, but you have to understand not everyone thinks like you. They see whoa 9 extra HP, wow must be way faster over stock and dont consider all of the other things that matter. Weight of the car, etc. Im not saying anyone in this thread is like that, but a few people mostly kids I know with other cars do that. Anyway i think it could possibly do something, but not much. Maritn



Martin
2003.5 BS G35
Nismo Aero/Sport Package
Injen CAI
B+G Springs
ADR M-Classic 19's..

 

I bought the pleumum because of how it effects the power curve. I bought it because of the number of people before me came out and posted very good reviews after having installed the product (I'll draw a line of distinction to point out I'm talking about the 350Z community) I bought it because the reason's for it's creation are valid and sensicle unlike the whimsical fluffiness of other so called power mods for these cars.

Whatever the numbers, the pleneum enhanced the car in a way that causes me to not question what I paid and to let other's know, "hey, it works, it's easy to feel what it did for the car, I highly recommend it." No other mod, save for my custom TD exhaust brings the dollor spent to actual results in terms of actually making a difference front and center as the Crawford pleneum did.

My reality is that it unquestionably improved the car, or I would not be here again and again to point that out. Other's can front the arguement that I'm not really getting any improvements, that the pleneum really does nothing, but that flies in the face of what is my truth and what it did for my car, something I'm not shutting up about any time soon (grin).

"All that's necessary for the forces of evil to win in the world is for enough good men to do nothing.”
Edmund Burke

G35 6mt

 

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

Im not saying anyone in this thread is like that, but a few people mostly kids I know with other cars do that. Anyway i think it could possibly do something, but not much. Maritin

<hr></blockquote>

Well put. and again, I'm not against mods at all- hell I've been modifying cars and engines for 30 years and love doing it! It's a blast to do, and makes you a member of a select group of other G35 fanatics (I was going to say lunatics but thought better of it.) [img]/w3timages/icons/wink.gif[/img] The G35 is a terrific automobile and it's only natural to want to improve on an already great thing. If I didn't feel that way I wouldn't be in the process of spending 3 grand on new wheels and tires myself! My position on this thread was based on the original poster's question:
<blockquote><font class="small">In reply to:</font><hr>

I am new what is a plenum what kind of increase do i get

<hr></blockquote>
All or most of the replies speak very highly of (at least) the Crawford plenum and the gains in performance it offers. I was (and still am) going to play devils advocate and say that YES it will improve engine performance HOWEVER do not expect a dramatic gain in engine performance from this mod in and of itself. Yes it may shave 1/10th of a second off your track time (and I don't think there are that many general drivers on here that also track their G's) but in every day use and driving- you aren't going to feel much if any difference in the performance of the car. 9hp increase in a vehicle with this mass is just not enough for seat-of-the-pants-wow-what-a-difference-this-makes kind of result. Applied in conjunction with additional modifications to the intake/exhaust system- I can see where the gains would be noticable. But that's not what the original question was.

One possible plus to the Plenum change which is indicated on other forums is that performance MAY drop off the stock VQ after roughly 9-12k miles which MAY be due to compression failure in the #5 and #6 pistons which MAY be a result of the restricted stock plenum, resulting in #5 & #6 running too lean. If (over time) that can be substantiated, then I'll be ordering my own Crawford (nicely chromed- for my black coupe!)

 

Yea I feel the same way, that's why i put so much nto my car already and its still a lease. i just wanna enjoy it for the 3 years i have it, some think its stupid but whatever!! Ill get half the money back I put into it if I sell the parts, i'll be able to keep the wheels if I still want them for my next car and who knows, I might even get another G35 butt coupe to put most of my parts in. We'll see, rite now im just havin fun. Martin


Martin
2003.5 BS G35
Nismo Aero/Sport Package
Injen CAI
B+G Springs
ADR M-Classic 19's..