cat-back for NA ka

[collk88]

one of my next upgrades for my 93 240sx is a catback exhaust. i have looked around and fell in love with the apexi dual n1. i like the dual pipes because it mimics the dual tips that are stock with the car and i hate those coffee can exhausts that honda owners buy. when i went into my local performance store, they told me that i would lose my low end torque if i put it on but i should be ok with the silencers in it. I then realized if i was going to say normally aspirated, then it might not be a good idea. since then i have found 2 other catbacks that im considering. the Blitz realize tt, and the Greddy SP. both have smaller piping for NA engines. im still wondering if i would be ok with the n1dual since i will be getting the aem short ram intake also. would this help retain low end torque? i need help on deciding!!

[Exar-Kun]

HKS hiper or apex-i N1 dual will server you very well in N/A applications.

whoever told you you'd lose a lot of torque out of the dual N-1 is a moron, go back and slap them.

greddy makes a nice n/a exhaust too...

-chet

[TommyyJ]

i think that shop has their exhausts mixed up, you would lose a whole lot of low end if you put the GT spec exhaust on, i believe the piping is over 3 inches in diameter...you might lose a smidge of low end if you install the dual n 1, but nothin really noticeable...it will make up in the mid to top end range...

[sixxdeuce]

You dont want to put anything larger than 2.5 piping, even then you will lose some low end but you have enough to lose a little because its worth it to gain some on the top end where the Ka is weak. I thought the n1 dual was designed for the sr20 and had larger piping but i could be wrong, just go with 2.25 or 2.5

[TrunkMonkey]

You dont want to put anything larger than 2.5 piping, even then you will lose some low end but you have enough to lose a little because its worth it to gain some on the top end where the Ka is weak. I thought the n1 dual was designed for the sr20 and had larger piping but i could be wrong, just go with 2.25 or 2.5

nothing larger than 2.5"? this isn't true, and it's been proven. there are n/a KA owners who use the N1 dual and are very happy with it's results. imo, n/a or turbo, 2.5" should be an absolute minimum for the KA.

-demetrius

[C-Kwik]

I haven't seen any dyno runs with the Dual N1's. I have seen the single N1, and it lost no torque anywhere, or at least it was so close that you couldn't tell which line was which. But it did gain HP in the higher end.

I had run my 80mm greddy before I put on my turbo and even with the pre-silencer removed, it didn't lose any low-end that I could notice. A dyno may have shown differently, but it would have only been a small difference, if any.

[S14Zilvia]

HKS Hiper.

You won't be disappointed, trust me. If you are not a fan of the looks try to get over it because the performance and sound make up for it.

[nnkfws333]

I would go with the HKS Hiper As Well if your gonna stay NAIts got a deep tone and not as loud as the N1's

[ninjak84]

My vote goes to the A'PEXi N1 single.Of course, I'm biased , but it looks so stylin when it's angled!

[raging panda]

has anybody heard anything good about the tanabe madallion, or do they not make one for the s13 and i just read it wrong? And if price were a huge point in your decision to buy an exhaust, what would be the cheapest and best exhaust to get? Thanks guys!

[S14Zilvia]

has anybody heard anything good about the tanabe madallion, or do they not make one for the s13 and i just read it wrong? And if price were a huge point in your decision to buy an exhaust, what would be the cheapest and best exhaust to get? Thanks guys!

HKS Hiper.

IMO 460 shipped is a great price for the best all-around exhaust out there. Maybe you like the look of another better, but I'd go hiper any day.

[collk88]

it seems like the majority says the HKS hiper is the way to go....although i still cant get passed teh looks of hte dual N1. does anyone know anything about the blitz realize tt?? it looks pretty good and its supposed to be just for NA applications.

[burgy240]

I put the N1 dual on my DOHC and it was awesome. I didn't seem to lose any low end and definately felt better high end. The sound is awesome and it looks sweet too. I still have the dual but it isn't a KA anymore;)

[TommyyJ]

burgy

what springs do you have on your car??

[burgy240]

which car. the s14 had tokico blues and H&R sport springs.....great daily driver setup but no adjustability, the s14.5 is waiting for either cusco or tein full coilovers. depends on $$

[EnzoRWD]

what do you guys think about trust dd on a NA car? eventually theres gonna be a CA18DET in there, but for a year or two its a KA24DE. Is the DD okay for a NA KA? i was gonna just go N1 dual, but DD is so much cooler. but, is coolness more important the torque loss and excessive noise? ?-Enzo

[Emperor]

So if size doesnt matter... then what about the Apexi GT spec? Hey it does come with a silencer.... Seriously though, Enjuku has it for 450, its tempting. I wouldnt go turbo though for at least a year or two though. Any thoughts? or even laughter..

-Paul

[Exar-Kun]

"So if size doesnt matter"it does. anything over 2.8" will lose some of a N/A cars powerband unless it is flowing signifigantly more air than stock. IE, turbo, NOS, or lots of N/A 'tune' stuff.-chet

[Emperor]

Yeah, i figured. Thanks, but damnit Exar do you have to be right about everything? oh well...

[Exar-Kun]

Thanks, but damnit Exar do you have to be right about everything?

YES.

hehe. no, I just happen to know some things. but I get taught frequently.-chet

[TrunkMonkey]

anything over 2.8" will lose some of a N/A cars powerband unless it is flowing signifigantly more air than stock.

where did you get this info?

someone correct me if i'm wrong, but aren't some of the exhaust systems listed in this thread larger than 2.8 inches?

-demetrius

[Exar-Kun]

yes. but that doesn';t make them more effective, or mean they dont lose power.

in a 300zx(with 600cc more displacement, or valume of air flwoing through the exhaust) normally aspirated, with a single pipe exhaust 2.75" is nearly perfect for making the powerband larger without hampering anything. In a 240sx, I would wager once you go over 2.5" you lose some poewr(low end more than likely), but you get more high end power.

-chet

[apzak]

Quote »yes. but that doesn';t make them more effective, or mean they dont lose power.

in a 300zx(with 600cc more displacement, or valume of air flwoing through the exhaust) normally aspirated, with a single pipe exhaust 2.75" is nearly perfect for making the powerband larger without hampering anything. In a 240sx, I would wager once you go over 2.5" you lose some poewr(low end more than likely), but you get more high end power.

-chet.[/quote]

What size is perfect for the 240sx N/A? Say with pullys, intake, hotshot headers? I heard the headers are 2.25 so 2.25 would be the best.

[I am Technoman]

My HS header has a 2 1/2 inch collector that dumps into an expansion chamber that’s about 8 inches wide. At that point the air expands and then gets forced into a little 2 ¼ inch back pipe that is very straight. There is no resonator, just a fat Borla muffler To keep it quiet. I did it this way so that my exhaust would flow fast, and I can feel a serge when I launch my car as the pressure swells in that expansion chamber somewhere around 2500RPM.

[stutt944]

technoman is that a redtop underhood? the expansion chamber deal is really only a good idea if you're running a blown motor, correct? i've been reading into all these exhaust threads for a while. my muff is near the end of its life. and the cat sounds like its full of rust. its near impossible to weed thru all this madness. JESUS MAN. TELL ME ABOUT THE F-ING GOLF SHOES!!

[BabyboyDeLa240]

Any opinions on the 5Zigen Fireball catback exhaust? i like the Dual N1's but i also heard its for turbo...?

[JJ240]

What is your opinion on an N/A KADE running 11.1:1 compression, hotter cams soon and possibly NO2. Would 3 inch be too much? I would probably wrap my entire exhaust from headers to muffler to help cut down on turbulence. Is it still too much?