5zigen 3" too big for N/A?

[burgy240]

I want to get an exhaust and I think I want the 5zigen fireball but I don't know these questions.  I'm looking to swap motors within the year though.  Thanks for any help(sorry search didn't come up with any past posts)

[burgy240]

mods please move this to tech.  I don't know what happened.

[jyt747]

I think 3" is too big for N/A. You'll lose a lot of low-end torque. But if you're going to do a sr swap, I think it'll be fine. Just wait until you do your swap before getting the exhaust.

With the 3" your low end loss will be noticable, however your high end will increase =)
If you plan on doing the SRwap I'd say get the 3" now

[Grant]

what about the Apexi N-1 single/dual? Wouldn't that work for both setups?

[jyt747]

Grant, I think the n1 has a n/a model and a t-spec model. but I hear the n1's are nice. Plus, you could get a silencer for the n1's if you don't want to attract too much attention from the cops. Not sure if 5zigen does or not.

[Grant]

That's what I originally thought too, but I found out from chris that there are no N/A versions of an N-1 Exhaust for 240sx's. Chris has a N-1 single with the silencer and he it seems to be working fine (the silencer brings back some backpressure for low end).

Hey Sean, I was just wondering what does the blitz NUR spec-R rear section look like? I was thinking about gettting that for my existing HKS piping would it fit with some little modifications? and also do you sell just the blitz 70mm universal NUR Spec muffler?  how much for either? let me know, thanks.

[burgy240]

So if I want the zigen I should go with the 3.0" and just deal with the low end loss?

[thewholefnshow]

Sure, it will prepare you for your turbo lag later!

[LanceS13]

You're not gonna lose that much low end...likely, it won't  even be noticeable.  It will help out the KA's anemic top end...and you'll also be ready for the turbo.  So if you're seriously going to turbo it, get the 3".

[tnord]

i concur with the 3'' recommendation

[AJ]

so n1 single + silencer acts like 2.5inch?  I won't turbo for a while.. i'm just worried that 3 inch will be SOOOoo friggin loud.. which i don't want..  i trive on the highway a lot going  80+... = i'm above 3 grand a lot.. which means NOISE is a problem.

[crazyGardener]

i would hold off on the exhaust and just get it when you do the swap, plus a 3" exhaust will be LOUD on a non turbo car

[whateverjames]

i agree, wait til ya get the swap first. but if you must get the exhaust, i really don't see how it you'd lose too much low end, we have enough to spare, what are you going to do even out the power curve?? oh no!!

[LanceS13]

It will put out a pretty good drone at 3300rpm (~80mph).  So if you think that would be a problem, then just wait.  There's no sense in paying $450 for a n/a exhaust just to turn around and replace it with another $450 turbo exhaust.
If you haven't  already, spend the money on the suspension...it'll come in handy when you have that extra hp when you go turbo.

[Sick240]

I just put the N1 single on my ka, non-turno, and I didnt lose any low-end, btw, I dont get why people say N/A when they talk about turbos, turboed or not, it is considered to be naturally aspirated, just because it isnt belt driven, like a supercharger, forced air induction is still forced air induction, but with a turbo it is still naturally aspirated

[LanceS13]

Sick240,  I've never heard anybody say a turbo is  n/a.  
Turbo is not naturally aspirated b/c the air is not being  ingested  under atmospheric (natural) pressure.  The air is being mechanically pressurized (just like in a supercharger)...the drive for the pressurizing device has no matter.

[mbmbmb23]

I heard that the Zigen 3" exhaust is one of the loudest out there.  When I save up, Im gonna get the N1 dual...as to try and keep somewhat of a stock look (duals).  Just make sure you get something thats all stainless steel...(most of the expensive aftermarket systems are)



M

[Archangel]

I would go ahead and get the 3" if you are definately going to do the swap. If you're less than 85% sure the swap will be done within a year, then just wait on the exhaust.

I also like the N1 Dual, but I can't find the pipe diameter for them. (BTW, they make smaller silencers that fit the N1 Duals. Nice :biggrin:)

[240sxtreme]

I've talked with mechanics about this, and I believe people on the freshalloy forum have said the same thing...you really won't have a big drop in lowend if you're still running with a cat, which is restrictive enough by itself.  If you have headers, no cat (or highflow cat), and 3"....you could notice some loss in lowend...but with a cat, I wouldn't worry.

I have the N1, and unless I'm racing (drag or twisties), I use the silencer...not for the backpressure, but for the loudness...way to loud to be driving in a city (IMHO).  sound real good though, just loud.

[mmmunkie]

if i were u i'd keep the stock one till the swap then put on the new cat-back....just to see the difference in performance

[Sick240]

</span><table border="0" align="center" width="95%" cellpadding="3" cellspacing="1"><tr><td>Quote </td></tr><tr><td id="QUOTE">Quote: from LanceS13 on 10:18 pm on Feb. 7, 2002
Sick240, I've never heard anybody say a turbo is n/a.
Turbo is not naturally aspirated b/c the air is not being ingested under atmospheric (natural) pressure. The air is being mechanically pressurized (just like in a supercharger)...the drive for the pressurizing device has no matter.
</td></tr></table><span id='postcolor'>

from what I've always heard, it is still considered to be naturally aspirated, unless the car powers it. i.e. belt driven, not saying im right, your wrong, any of that crap, thats just what I have always heard, Later

[AJ]

thats be kinda nice, v8 asks &quot;you got any forced induction?&quot; &nbsp; 240 says &quot;nope, but i'll still whop you!&quot; &nbsp;V8 says, &quot;Your little 4banger can't handle this!&quot; &nbsp;VRrooooom

And you whop his ass caus your running a t66 on nitrous. &nbsp; lol..

[burgy240]

Thanks all. &nbsp;Cause of all the varing opinions and the uncertainty of my swap date(ie $$$$$$$ issues) &nbsp;I think I'll hold off on buying the 5zigen right now. &nbsp;I did however hear that the 5 zigen was actually quieter than many and that is why I was looking at it over the N1!!!!thanks again.

[BlankFlip]

</span><table border="0" align="center" width="95%" cellpadding="3" cellspacing="1"><tr><td>Quote </td></tr><tr><td id="QUOTE">Quote: from Sick240 on 1:20 am on Feb. 9, 2002
</span><table border="0" align="center" width="95%" cellpadding="3" cellspacing="1"><tr><td>Quote </td></tr><tr><td id="QUOTE">Quote: from LanceS13 on 10:18 pm on Feb. 7, 2002
Sick240, I've never heard anybody say a turbo is n/a.
Turbo is not naturally aspirated b/c the air is not being ingested under atmospheric (natural) pressure. The air is being mechanically pressurized (just like in a supercharger)...the drive for the pressurizing device has no matter.
</td></tr></table><span id='postcolor'>

from what I've always heard, it is still considered to be naturally aspirated, unless the car powers it. i.e. belt driven, not saying im right, your wrong, any of that crap, thats just what I have always heard, Later
</td></tr></table><span id='postcolor'>

i'm saying lances13 is right <img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/smile.gif" border="0" valign="absmiddle" alt=':)'>. turbo is a form of forced induction, just feeding more cool air to the engine, not &quot;naturally&quot; doing it. hope that sounds simple enough, i'm bad w/ using big words <img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/smile.gif" border="0" valign="absmiddle" alt=':)'>. also look at some info when u buy an exhaust if it has n/a n t-spec ones, it most likely will n i be the n/a spec ones will always be smaller. oh yeah, 3&quot; will be kinda #### loud w/out silencers on an n/a, but if u can deal w/ it, go for it. persoanlly, i wouldn't drive around w/ a 3&quot; exhaust w/out ne silencer(s).

[cmathews]

N/A Is Turbo or Super. And to the comment about one is driven by the engine and the other isn't, that isn't true. One is directly driven by the engine, the other is indirectly driven by the engine. In the racing and engineering world, N/A means no turbo or superchargers involved, just 1 ATM of pressure supplied by the earth's atmosphere. (1ATM=0 psi; 2ATM=14.5PSI)

[LanceS13]

</span><table border="0" align="center" width="95%" cellpadding="3" cellspacing="1"><tr><td>Quote </td></tr><tr><td id="QUOTE">Quote: from cmathews on 10:12 am on Feb. 14, 2002
(1ATM=0 psi; 2ATM=14.5PSI)</td></tr></table><span id='postcolor'>
That's only true if you're measuring in gauge pressure. &nbsp;
1atm=14.5psi absolute pressure or 0 psi gauge pressure
So all n/a engines are being fed air at 14.5psia. &nbsp;Additional boost is measured in gauge pressure (psig)....so a turbo running 7psig is actually feeding the engine air at 21.5psia