hey guys i am putting the momentum turbo kit currently on my 04 z and havent been able to find any dyonos of the added gains the headers give. IF anyone has personal experience with this kit and the headers any input would be great.

Thanks

 

1) check the thread they initially posted they had some dynos there when they released the turbo kit, exhuast, and headers. you failed at searching

2)if you have the headers why does it matter? put them on

3) if your stock block your wasting your time the engine will die before you hit the limits, sure they might help but you wont be able to max your setup on stock headers so why bother

4) if you DO NOT have the headers good luck since they are out of business and you will be lucky to find a set.

5) here's a bib to go with your spoon feeding since its been covered a million times that every set up is different

 

If you don't already have headers then use the OEM. Sure headers will allow more room to breathe but they are a PITA to install and if you are having a shop do the work for you this will increase the $$$$ for install.. Header install alone can be a few hundred if you don't have a guy or connection to help ya out.

 

Headers don't really make that much of a difference on our cars. Furthermore, many aftermarket headers use thinner cast metal on the construction and when you combine that with the extra heat from the turbo when in boost, you stand a higher chance of structural failure on the headers.

If you compare the stock headers from Nissan, they are very thick and well-built. If I were you, I would leave the stock headers on unless you know for a fact that the aftermarket headers can handle the extra heat.

I just wish to reiterate that headers didn't really do **** for my car and it 3was a waste of money. Luckily, I managed to find someone who bought them from me.

 

the only time headers are going to be a benefit is if your going for above 500 to the wheels which needs a built block like i said. i would have to disagree with blu blur on construction however. i have ceramic coated and heat wrapped megans because the price was right and allow the extra flow for my power levels. even with such a cheap off brand i have had 0 issues with cracks or breaking and this is getting them red hot after a single pull.

 

Headers offer significant gains due to the tiny size of the stock headers. The only problem is those gains won't be used until after you reach the limits of stock block. So for stock block setups you won't use the extra flow offered so it's not really needed.

As for crappy aftermarket headers that is untrue. I've been on cheap JVT headers for 3 years now in midwest snow and crap weather with no issues. Some people get bad batches of headers and welds can crack. It happens but not enough per the amount they sell to call it "common".

 

one thing the OP needs to realize is that headers on the turbo system he is using in particular offers VERY little room for the IC pipe to scoot past on the drivers side... Im running into that issue on my powerlab single kit and powerlab shorty headders.. may have to ditch them if theres not enough room to get it to fit reasonably. Momentum is built in the same general direction as powerlab.

 

I don’t think the intercooler pipe will ever get in the way of the headers… downpipe maybe…

 

Down pipe yes..sorry..

 

Headers DO NOT offer significant gains. Hell, my Nismo headers didn't even make my car sound different. The VQ already coems from the factory very well-tuned. Unless you are going to bore out the exhaust ports in the block and get headers that have a larger diameter to mtch, you aren't going to feel any difference in power. Almost all N/A mods for the 350Z are worthless in providing noticebale increases in power and torque. I spent thousands of dollars in N/A mods and during that time, the only mod that actually showed noticebale improvement was a front/rear adjustable sway bar (which of course isn't a power producing mod).

Lastly, most aftermarket headers are thinner cast and will break down compared to the thick Nissan factory headers.

Is your car turbocharged or supercharged, Binder? All I see you mention is that your headers have been through midwestern 'snow and crap'. Well, 'snow and crap' is a lot less hostile on your headers when your turbo is putting your exhaust gas temperatures up to 1600 degrees or more

 

Hmmm... That's odd. Aftermarket headers are necessary for additional clearance for a larger 3.5" downpipe with a larger T4 turbo like the 7675. So I don't know why headers would be creating a fitment problem for the standard 3" downpipe.

 

Id browse the Orig Post again a bit.

 

lol this is the FI forum where both myself and binder are regulars, we are also the only two running boosted performance 6765 kits, for NA sure they are worthless but this is the FI forum and we are discussing a FI question. anything over 500 hp and the headers are a restriction, but the restriction isnt in the individual runners its after they merge, the ID after merging is hardly any larger then the individual runners themselves and is a serious restriction when looking for real power.

i just dynoed at 530(significantly more next dyno that 530 was with misfires and overfueling bad enough to not allow the engine to rev above 6400 rpms according to the dyno operator which should be fixed now.) and binder is over 650 hp. on a stock block turbo setup like the op is talking about however the engine itself will be the limit before the headers due to the weak as **** rods.

also the "snow and crap" is going to be ALOT more hostile to headers on a turbo car then non, simply due to a greater change of temp when they hit, not to mention a significantly higher temp period.

not to mention both me and binder are running "bottom of the barrel" headers and i can tell you my megans are about twice as thick as stock in the walls and a decent amount thicker in the flange. anyone who had issues just got a bad pair, there are very very few reports of cracked headers even with FI.

 

6765? Sweet jeebus..lol.
I'm doing a 6266.. that should be a pretty stout dyno chart when yer done..

 

well once i get stateside i intend to switch to e85 and go for 800 to the wheels right now im settling lower due to whats available on island, plus i never did cams due to issues i had getting them so im just holding off, tuning the car and enjoying it now.

 

I think that you are thinking of the (essentially) heat shield that appears to be part of the pressure boundary, but if you look at a cut-away of the stock manifolds, you'll see that they are actually quite thin walled. It's more like a pipe inside a pipe configuration. I know I've seen a picture in a thread here somewhere.

 

Werd there are manifold pix lurking within this section in one of the Boosted P threads!

 

There is dyno proof showing headers are restrictive. Hal at dynosty has proved with before and after headers will increase power output significantly on 2 different turbo kits. I have a couple of them on my laptop and I'll post up. There was 40hp gain when headers were changed after trying to add as much boost as possible on stock headers.

Sasha cut apart stock headers to measure the cross sectional area. Cross sectional area is tiny and the walls are also very thin. Like Dave said there is a shield all the way around that header that makes it look thicker than it is. Search boosted performance posts and you can see all the pictures with a ruler on them showing the thickness and diameter.

I'm 650hp turbo system. My exhaust system sees enough heat that the gopro video of under the car during dyno time showed my wastegate and turob housing glowing yellow during high hp pulls. Now there are chances of cracking with any weld or metal. People can't predict metal defects but for the most part aftermarket headers have been pretty reliable. Especially momentum headers. They are probably some of the strongest built on the market. High quality metal and welds.

 

I wish you guys woulda told me that Binder was boosted because I don't know him very well (at all, actually, from a forum perspective) and all I saw from his original post was his pointing out of the weather as opposed to his actual boosted history.

 

^ yeah binder knows more about VQ's than the majority of this forum.

What brand headers are you referring to blur? Megan, DC, ebay, the usual budget clone brands?

You should see my new stainless Tomei's, welds are amazing, the steel is flawless. Momentum's are great too as binder stated.