Nameless Performance Equal Length Stepped Header

[autobrz]

From my experience with other 4 cyl cars, 4-2-1 headers are quite a bit quieter than 4-1 headers. also 4-2-1 tend to spread the torque over a wider rpm range than the 4-1 variety but it all depends on the tuning (of tubing diameter and length).

I think somewhere in this thread they said they will release 2 versions, one power biased and one torque biased with smaller diameter primaries. the latter should be quieter too.

For me though the ESC option is the quietest and simplest way to flatten out the torque curve and have a nice bump in power too.

[calispec]

I am by no means an expert on headers or exhaust but I know a little about harmonics. From what I understand headers are tuned to specific frequencies which help draw air through the combustion chamber. 4-2-1 headers will end up with two natural frequencies yielding two torque peeks. 4-1 headers have one natural frequency usually producing one larger torque peek. Getting each exhaust pulse to convirge and cause a low pressure wave to occur near the exhaust valve just before it opens will get more exhaust out of the combustion chamber. More clean oxygen and fuel can then enter the combustion chamber and produce a larger explosion. Like I said I am no expert on exhaust but I believe these are the basics of what nameless has mastered. If anyone with more experience can shed more light on the subject I would appreciate it.

[FR-Sizzle]

Originally Posted by chanomatik

Think about it this way: 18 months ago this idea from them wasn't even known. So, 18 months ago they had ZERO customers. So... if people want to go elsewhere, then all they're doing is building up LOYAL customers. Also known as "thinning the herd".

If you guys don't wanna wait, you have options. I mean, come on, the entire essence of the FT-86 has been about waiting, if nothing else. We had to wait for it to not be a rumor, wait for increased quantities to be available. Hell, I had to wait 6 months from order to delivery! Could we have purchased other RWD coupes in the meantime? Sure! Did we? Hell no! Why not? Because quality.

Are people really that eager and lack that much self-control to actually BLAME Nameless for not making the header Priority #1? Seriously? People are really that fickle? Geeeebus. Don't ever include yourselves in any group buys. The wait will KILL you.

People have no problem waiting if they would just give a solid ETA. Instead of saying 1 more month for months. People dont like that and its unprofessional to keep giving false hope like that. IMO I bet they knew it wouldnt be out for a couple more months around June but kept telling people 1 more month to hold them back from going to another vendor and buying there headers. With so many new headers out around then, I could easily picture them saying 1 more month and to continue to do that just to keep people waiting from going to another vendor.

I already went with another vendor as I was fed up with waiting a month ago. I am ok if their headers arent as good as mine because I highly doubt 95% of the people will notice the difference in a couple whp from 2 different types of headers. Them saying 1 more month for 3 months is just ridiculous. They should either not say anything or just say it will be a couple more months and be honest. All it seems like they are doing is just beating around the bush to prevent potential customers to go to another vendor.

[FR-S Matt]

Originally Posted by FR-Sizzle

People have no problem waiting if they would just give a solid ETA. Instead of saying 1 more month for months. People dont like that and its unprofessional to keep giving false hope like that. IMO I bet they knew it wouldnt be out for a couple more months around June but kept telling people 1 more month to hold them back from going to another vendor and buying there headers. With so many new headers out around then, I could easily picture them saying 1 more month and to continue to do that just to keep people waiting from going to another vendor.

I already went with another vendor as I was fed up with waiting a month ago. I am ok if their headers arent as good as mine because I highly doubt 95% of the people will notice the difference in a couple whp from 2 different types of headers. Them saying 1 more month for 3 months is just ridiculous. They should either not say anything or just say it will be a couple more months and be honest. All it seems like they are doing is just beating around the bush to prevent potential customers to go to another vendor.

I've been waiting over 2 months for my JDL header and that header IS released. No ETA on when mine will even be showing up.

[campy]

You would think that, as FRS/BRZ owners, we would be used to waiting a really long time for something with no ETA or info.

[cslntuee]

Originally Posted by campy

I'd be open to doing a tune and other exhaust components, but my goal is to even out the torque dip while keeping the car reasonably quiet. I'm not looking for anything too loud and I'm not making a dyno queen, so I'd probably be keeping the stock muffler too.

HI,

I also have the goal.

1. Kick out the torque dip.

2. Will not lose torque in low rpm, due to I'm a daily driver.

3. Not too loud. (reasonably quiet)

So, what's your final decision (or candidate) for header?

Did you also plan to upgrade the over pipe , front pipe?

Thanks.

[Dimman]

Originally Posted by calispec

I am by no means an expert on headers or exhaust but I know a little about harmonics. From what I understand headers are tuned to specific frequencies which help draw air through the combustion chamber. 4-2-1 headers will end up with two natural frequencies yielding two torque peeks. 4-1 headers have one natural frequency usually producing one larger torque peek. Getting each exhaust pulse to convirge and cause a low pressure wave to occur near the exhaust valve just before it opens will get more exhaust out of the combustion chamber. More clean oxygen and fuel can then enter the combustion chamber and produce a larger explosion. Like I said I am no expert on exhaust but I believe these are the basics of what nameless has mastered. If anyone with more experience can shed more light on the subject I would appreciate it.

You're on the right track. The negative pressure waves are generated when the initial positive pressure wave reaches a cross-section increase and starts to expand. Including backwards with a reversed sign. Primary and secondary pipe merges, atmosphere and steps (see F1) all generate these returns. If the wave reaches a dead end (closed valve, branch resonator) it reverses direction but not sign (+/-). Now it's just a matter of following the wave from the initial positive pulse, through the entire system, accurately tracking its direction, sign and speed (local speed of sound changes with EGT) through EACH connected path, that are firing at different intervals (primary pairing on 4-2-1 relates here), plus tracking the wave's return strength at the valve to establish effectiveness (also the initial pressure of the wave varies with RPM plus cross-section area affects it, and it loses energy at each direction change). How long it takes to come back then needs to be compared to whether or not the valve is open (higher rpm means less valve open time, so the tuning range is narrower).

Etc, etc, etc...

Hopefully this gives you some things to think about.

[campy]

Originally Posted by cslntuee

HI,

I also have the goal.

1. Kick out the torque dip.

2. Will not lose torque in low rpm, due to I'm a daily driver.

3. Not too loud. (reasonably quiet)

So, what's your final decision (or candidate) for header?

Did you also plan to upgrade the over pipe , front pipe?

Thanks.

Honestly I haven't done too much research yet. I want to avoid UEL headers because I personally don't like the sound and there are reliability issues with them on older WRX boxer engines. It seems like stepped 4-2-1 EL headers have a more even torque distribution than 4-1 EL headers, so I've narrowed it down to a stepped header (like this Nameless one, or the HKS EL header) unless enough dyno graphs and owner accounts prove to me that 4-1 is better.

As far as I can tell, the overpipe isn't particularly restrictive, but I was thinking of getting a new (catted) front pipe to free up some of the restriction caused by the secondary cat.

I also just bought JDM tips, so I don't want to replace my muffler but I recently noticed it's rusted to shit, so I might end up replacing the whole exhaust system anyway.

[OrbitalEllipses]

Reliability on headers in a WRX have no regard to EL/UEL, it has to do with using stainless (SS304 usually) in a high heat setting. SS321 doesn't have the issues you see with "normal" stainless headers in a turbo application, but the materials cost is a LOT higher.

[cslntuee]

Originally Posted by campy

Honestly I haven't done too much research yet. I want to avoid UEL headers because I personally don't like the sound and there are reliability issues with them on older WRX boxer engines. It seems like stepped 4-2-1 EL headers have a more even torque distribution than 4-1 EL headers, so I've narrowed it down to a stepped header (like this Nameless one, or the HKS EL header) unless enough dyno graphs and owner accounts prove to me that 4-1 is better.

As far as I can tell, the overpipe isn't particularly restrictive, but I was thinking of getting a new (catted) front pipe to free up some of the restriction caused by the secondary cat.

I also just bought JDM tips, so I don't want to replace my muffler but I recently noticed it's rusted to shit, so I might end up replacing the whole exhaust system anyway.

Thanks a lot for your response and suggestion.

What kinds of transmission do you have (AT or MT)?

Thanks again.

[FR-S Matt]

Well guys, I got a chance to speak with Jason and John both a bit. Header is still going through final revisions and logistics/other things are being worked out. They are concerned with the options of the header modifying the shroud (beast mode header) vs the non modifying one meeting performance standards.

Yes, its taking forever. They realize this just like we do. They want it done right and to be the best. Can you really argue that? I haven't seen a company go this far in depth with a header. I have no doubt this one will be the best and I'm not even buying it. I'll be getting the turbo manifold later on.

Hang in there 86ers.

P.S. My 3" downpipe and 3" midpipe shipped today.

[Sonolin]

Originally Posted by FR-S Matt

Well guys, I got a chance to speak with Jason and John both a bit. Header is still going through final revisions and logistics/other things are being worked out. They are concerned with the options of the header modifying the shroud (beast mode header) vs the non modifying one meeting performance standards.

Yes, its taking forever. They realize this just like we do. They want it done right and to be the best. Can you really argue that? I haven't seen a company go this far in depth with a header. I have no doubt this one will be the best and I'm not even buying it. I'll be getting the turbo manifold later on.

Hang in there 86ers.

P.S. My 3" downpipe and 3" midpipe shipped today.

I've been waiting since the thread was started, lol. Thankfully I'm patient (well and a little broke right now :P). I have confidence this will be *the* mod to do for people staying N/A. Thanks for the update.

[FR-S Matt]

Originally Posted by Sonolin

I've been waiting since the thread was started, lol. Thankfully I'm patient (well and a little broke right now :P). I have confidence this will be *the* mod to do for people staying N/A. Thanks for the update.

Even with people hopping ship getting other headers, watch when this releases.

[garfull]

why do some headers have flex pipe on one bank of cylinders before the collector and some headers don't? the oem headers have this flex pipe. is this needed to compensate for thermal expansion between the two heads and main engine body?