Yeah we'll see about that vs. a custom tune...

Regarding headers though, if I had the means here's what I would like to see:
1 - stock car - dyno it. Install headers, then dyno it again.
Since if you're doing headers, you're probably doing other stuff too... so then,
2 - install your cai, cats, cat-back, or whatever you want on your "final build" - dyno it. Install headers, dyno it again.
Then, if you're really curious, remove the headers from your "final build".
3 - with your "final build" and stock headers, get a custom tune - dyno it. Install headers, get another custom tune - dyno it.

Now we can really draw some conclusions. We would *assume* that your custom tuned car with all mods and headers should put up the best numbers. If the numbers were equal to, or greater (or even a little less) with stock headers, then we can say aftermarket headers aren't worth it. I wouldn't be too surprised if that was the case.

I'm not tryin to defend headers here, but I hope they do something positive since I did spring for 'em. True apples to apples comparisons would be ideal, but that's alot of dyno runs and def outside the scope of what i'm tryin to do.

 

Ill stand behind you on the headers, but remember right now stillen is the only one in the game. Do a search for my header thread, some insiders say other companies will be out soon

 

IMO save your money, I have come to believe that NA mods just prolong the inevitable and the gains you feel are minimal. You can save yourself some time and money just go FI and call it a day.

 

Ok.... well if FI is the only way to go, can the Stock engine handle a twin setup???

 

apparently the VQ's are very responsive to FI... GTM i think got an auto g37 making 455 whp 338 ft/lb torque at 5 psi on 91 octane fuel... pretty good imo

 

Yep, the VQ's take FI nicely. The only problem is some of us dont really have 15k cash in hand, ready to put down on a turbo kit, without taking out some kind of loan. The down time on a turbo kit installation is too wide, ranging from 2-3weeks to MONTHS.

On the other hand, its quite common for us to come across a few hundred here and there, or maybe 1500-2000 for an exhaust, etc. This is why you see people buying headers, intake, and stuff like that.

The point i'm trying to make is that N/A mods, while don't really make a difference, are much more affordable than going TT. Thats without looking at it from a "total cost" perspective.

 

hold hold hold it guys.. so u people are telling me that g37 full stock already have headers from the company??

eeeeew it must be weak headers then

 

Huh? All cars come with headers stock. Aftermarket headers are supposed to increase airflow through the exhaust, thus creating power.

 

from reading your replies , I think you should have a look at the modding 101 thread. This will help you to understand the benefit of different NA mods and how they work.

labor on installing the Headers is going to cost you probably just as much as the headers themselves. If money is no object for you, then go FI. The other route is to do all the NA engine mods and have a small hp\torque gain in comparision.

 

Bro have you ever had a car before or even sat on one,lol. You need to go back to your big wheel or power wheels.. just joking

 

JJ, I think since money is not an option you hire me to be your advisor and ill answer your PMs with valuable information on what mods to do and not do....


Speaking of that... C@ciQ ... you owe me some $$$

 

Ha ha. Paypal or money order?

 

Just being noisy lol:
http://www.the370z.com/intake-exhaus...id-dyno-2.html

 

so you're not the only one with that issue eh? more reason to keep stock headers!

 

It all came to last word of tuning...we have to see.