NA Build: Kacz07's 2006 SS 350z RevUP
10-02-2010, 04:58 AM
#186
But im not here to argue with you. Just seems that they are too solid and stiff with no motion to flex. Those long tubes look like they will succumb to cracking.
Perhaps they will not, just my thoughts from what i see in the pic. Till i get to see them in person and handle them its just an opinion.
Jesus i might even be the one putting them on...lol!
Last edited by Dr. Venture; 10-02-2010 at 05:26 AM.
10-02-2010, 05:49 AM
#187
The stock y-pipe is neither a header nor a test pipe so mentioning them as a point of reference is well... meaningless. If the picture above are of Megan Racing test pipes than they must be a revised version because their initial offering did not have a flex pipe. See picture below:
In any case, I will admit that I stand corrected in that their is a manufacturer that offers a test pipe for this platform that does include a flex joint. The fact that no other manufacturer includes this with their test pipes (including Nissan with the factory exhaust manifold and catalytic converters) should tell you that movement within the header or test pipe is a not a point of concern. With that said the same goes for a properly designed long tube header.
In any case, I will admit that I stand corrected in that their is a manufacturer that offers a test pipe for this platform that does include a flex joint. The fact that no other manufacturer includes this with their test pipes (including Nissan with the factory exhaust manifold and catalytic converters) should tell you that movement within the header or test pipe is a not a point of concern. With that said the same goes for a properly designed long tube header.
10-02-2010, 06:17 AM
#188
Well look, it probably won't crack or be damaged due to anything. But the Stock Y pipe with the flex is what separates the movement between front and rear exhaust parts. Giving that small flex will save stress fractures from happening. Sectioned exhaust parts also help from being too stressed as well.
All i am saying is that those Headers however amazing and good looking they may be could have the possibility of cracking from movement either from the engine and or the other exhaust parts. Especially since from the pic, i do not see any centering support near the tp section.
All i am saying is that those Headers however amazing and good looking they may be could have the possibility of cracking from movement either from the engine and or the other exhaust parts. Especially since from the pic, i do not see any centering support near the tp section.
Last edited by Dr. Venture; 10-02-2010 at 06:26 AM.
10-02-2010, 06:21 AM
#189
I'm glad you were able to jump on these headers, I know you've wanted them for a while! For some reason (strange considering the amount of interest I've recieved!) the other set is still available. Adam/Kwame, if you guys want to get in on this final pre-production deal now's the time.
Regarding the flex pipe situation, because the VQ is in a RWD setup, the engine is only going to rotate side to side - NOT forward and back like any FWD setup. For this reason a flex pipe in the two y-pipes is the perfect solution, If the engine rocked forward and backwards then flex's in the test pipes may be better.
Not to mention I've been running my headers in my racecar for multiple 3hr endurance races and many many sprint races - with no flex pipe anywhere in the exhaust - and the headers have shown no signs of fatigue. Although, my engine is solid mounted!
Regarding the flex pipe situation, because the VQ is in a RWD setup, the engine is only going to rotate side to side - NOT forward and back like any FWD setup. For this reason a flex pipe in the two y-pipes is the perfect solution, If the engine rocked forward and backwards then flex's in the test pipes may be better.
Not to mention I've been running my headers in my racecar for multiple 3hr endurance races and many many sprint races - with no flex pipe anywhere in the exhaust - and the headers have shown no signs of fatigue. Although, my engine is solid mounted!
10-02-2010, 07:02 AM
#191
Hey Jonathan, just checkin in with ya. Im excited for you to get these headers. Also Im still game for taking care of you on the install and re dynoing these things in the interest of getting good back to back comparisons. Also we are in the process of installing a Mustang AWD dyno so we will be able to test both results and tunes on either dyno!!!
10-02-2010, 08:02 PM
#192
@Sasha: Thanks! Can't wait to get these on the car. I'd love to see these headers on Z1's setup, too.
I never considered the differences in engine orientation between a FWD and RWD setup. Interesting. I also have solid motor mounts in my setup and your headers have been put through a torture test with your competitions, so I would think that I'm pretty safe from cracking and the like, although Dr. Venture's concerns are valid.
I would think that the headers are so long that they would flex and the energy would be dispersed over a larger area, which would allow it to absorb more stress, but not in any particular area.
@Vince: Good to hear from you! I would love to see how these headers compare to my current setup AND how the 'stang will compare to your DJ. I'll be in touch with you over the next few weeks.
I never considered the differences in engine orientation between a FWD and RWD setup. Interesting. I also have solid motor mounts in my setup and your headers have been put through a torture test with your competitions, so I would think that I'm pretty safe from cracking and the like, although Dr. Venture's concerns are valid.
I would think that the headers are so long that they would flex and the energy would be dispersed over a larger area, which would allow it to absorb more stress, but not in any particular area.
@Vince: Good to hear from you! I would love to see how these headers compare to my current setup AND how the 'stang will compare to your DJ. I'll be in touch with you over the next few weeks.
10-13-2010, 02:33 PM
#193
Hey all, I'm looking to change my current airbox setup:
stock 06 airbox vs. 03-05 airbox
Planned velocity stack to integrate:
Purchased a 2.5" and a 3.0" inlet to do some experimenting when trimming.
Although the 06 does have that velocity stack, I'm going cut it out, port match the airbox inlet (to the diameter of the vstack) going to the MAF housing, and epoxy it in there. Depending on how much I trim from the vstack inlet, I can expand the stock airbox opening from 72mm up to 80mm or more.
The stock inlet was acting as a restrictor, limiting the airflow to the 3" MAF. This was left untouch by Vince on purpose. Opening this up will give me nearly 10% more surface area, as calculate by 1cockyz in a previous post. I think this will help my power towards redline the most, but I should see gains across the board. My next baseline dyno, before the header install, will be with this new velocity stack.
stock 06 airbox vs. 03-05 airbox
Planned velocity stack to integrate:
Purchased a 2.5" and a 3.0" inlet to do some experimenting when trimming.
Although the 06 does have that velocity stack, I'm going cut it out, port match the airbox inlet (to the diameter of the vstack) going to the MAF housing, and epoxy it in there. Depending on how much I trim from the vstack inlet, I can expand the stock airbox opening from 72mm up to 80mm or more.
The stock inlet was acting as a restrictor, limiting the airflow to the 3" MAF. This was left untouch by Vince on purpose. Opening this up will give me nearly 10% more surface area, as calculate by 1cockyz in a previous post. I think this will help my power towards redline the most, but I should see gains across the board. My next baseline dyno, before the header install, will be with this new velocity stack.
Last edited by kacz07; 10-14-2010 at 07:50 PM.
10-13-2010, 02:41 PM
#194
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but you can only flow as much as your smallest inlet, which is your throttle body, and the neck to the intake manifold
give it a try, I just wouldn't personally invest a whole lot of money into it
give it a try, I just wouldn't personally invest a whole lot of money into it
10-14-2010, 05:32 PM
#200
Mainly it's the idle and decel maps that need to be adjusted. Uprev has done it, years ago. That Proflow/350evo tb drove poorly due to the map not the tb. Due to lack of tuning support Proflow stopped doing them due to the "failure rate", especially the earlier tb's. I have a Proflow tb that works I never got to put it on and get it tuned. If you want to dyno test it cause your local lmk when you're going I am down to watch, iron hill brewery down the road from Rt is good for "lunch".
