Apexi n1 on KA motor?

[alkrmr18]

i am doing my swap this summer and i want the apexi n1 exhaust, can i put the exhaust on the stock ka motor, every site has just one part number for the n1 exhaust and says nothing about which motor, but on final stage auto it says "SR20DET CONVERTED 240SX ONLY!", please help, thanks

[xnissans14x]

it should work fine. n1 exhaust can go on either ka or sr.

[CoasTek240]

same exhaust path... both engines as long as (youre still in ur original chasis-i.e. s13ka-s13sr or s14ka-s14sr)will use the same exhaust....

[pruto]

the only reason why turbo 80-100mm exhausts have that turbo only disclaimer is because on a NA the sucker is LOUD. It probably is good for some power gains, but it zaps low end torque and the loudness attract cops.

i lost my silencer on my Uras RS, it hurts my head driving around now

[mike13]

the only reason why turbo 80-100mm exhausts have that turbo only disclaimer is because on a NA the sucker is LOUD. It probably is good for some power gains, but it zaps low end torque and the loudness attract cops.

i lost my silencer on my Uras RS, it hurts my head driving around now
i expect more from long time zilvia users. STOP SPREADING MISINFORMATION!!!
its been proven time and time again that turbo sized exhausts make power throughout the entire rev range on normally aspirated KA!

[SimpleS14]

Umm...don't worry...you can get the exhaust.

i expect more from long time zilvia users. STOP SPREADING MISINFORMATION!!!
its been proven time and time again that turbo sized exhausts make power throughout the entire rev range on normally aspirated KA!


care to share your information along with some evidence?

[Salty_X]

I think this speaks volumes... Bling (http://forums.freshalloy.com/ubbthreads/showflat.php?Cat=&Board=UBB9&Number=67651503&Forum=All_Forums&Words=pro%20racer&Match=Entire%20Phrase&Searchpage=1&Limit=25&Old=allposts&Main=67651483&Search=true)

The only downfall is that large diameter exhausts are loud, something you'll have to decide if you want to deal with.

[nightwalker]

thank you Salty for the link. It's been a long time accepted fact that turbo exhausts work absolutely great for NA KAs. Downside is the noise. Do like I do, get yourself some ear plugs and forget about it.

[Bliss]

then wtf? isnt it supposed to "theorectically" be more advantageous to use smalled piping on NA cars? since when did that all go out the window? can any one explain why theory says one thing, but it performs different in real life?

[nightwalker]

you just answered your own question bud.

[Bliss]

um no, i didnt. what the hell is going on that causes the theory to be wrong??? dont be a cock.

[mike13]

um no, i didnt. what the hell is going on that causes the theory to be wrong??? dont be a cock.
the theory is right if you're talking about a honda engine. the KA has a lot of potential for horsepower in increasing its ability to breathe, just like all higher displacement engines.

[GlacierFreeze]

/\ What he said.

[ICKY]

Apexi N1 Single turbo catback exhaust. Sacrifice low end torque for top end. It is loud, xpecially on the freeway.

[morpheus8486]

That's awesome. This is the first time I've ever heard about a turbo-sized exhaust having worthwhile power gains for the KA. Thanks for the info everyone.

[HIstateS13]

LOUD is GOOD :rl:

[driftz240sx]

My N1 isnt loud at all on the freeway. I didn't feel any power loss down low either.

[deedeedum]

would the silencer help a lot or not?

[DRFT0nE]

yea I have an N1 on my stock KA and barely any torque loss... she's quiet at idle.. and sounds very smoothe when I drive through the streets.. maybe people mistake loud for strong?.. my exhaust gives out a strong TONE.. but she's not loud lol.. and on the freeway I don't even hear the exhaust anymore.. so I'd give it a go green because in my experience I still have real smoothe and responsive low end and it gets better at the high end.. it doesn't feel like the car is struggling lol

[DRFT0nE]

would the silencer help a lot or not?

yea it'd help a lot.. be even more quiet.. and gain back some of the loss back-pressure.. but like I said.. you won't even notice it..

[alkrmr18]

thanks guys for helping me out, also do u think not having an intake with an exhaust is a bad idea, i don't wanna waste money on an intake if i'm gonna swap out the ka anyway

[mike13]

Apexi N1 Single turbo catback exhaust. Sacrifice low end torque for top end. It is loud, xpecially on the freeway.
are you blind??!?! :hammer:

[DRFT0nE]

thanks guys for helping me out, also do u think not having an intake with an exhaust is a bad idea, i don't wanna waste money on an intake if i'm gonna swap out the ka anyway

don't waste your money on an intake if your going to swap the motor.. your only getting the exhaust because you're going to need it anyway.. so no it's not a bad idea lol

[jdm-drift]

yes its true you do lose torque, i had my exhaust on my s14 before with a ka and it really wasnt that loud except in low gears 1st and 2nd but i cuold tell a noticable torque loss and really no power gain :doh: but the bling factor was amazing!

[RanciD]

First, an oversized exhaust on an NA engine will hurt low end power, KA included. This is most likely the case with the N1 on a KA as 3" is pretty big for a 2.4L four cylinder.

Second, all this backpressure stuff is a myth. You don't want backpressure, ever. You want velocity. They're often confused. Smaller exhaust piping will increase velocity and with that increase backpressure. You don't want more backpressure, you want more velocity meaning it's a compromise. If your piping is too large then there won't be enough velocity to move the exhaust out of the system, meaning the engine must push it out. This is the case at low RPM in an engine like the KA. At lower RPM ranges the exhaust's velocity isn't great enough to push it through such large piping, resulting in the loss of low end power. A properly sized exhaust will encourage scavenging of exhaust out of the head and will provide the least backpressure while still mantaining velocity high enough to keep exhaust moving.

EDIT: Often people get a large 3" exhaust and then to "get back low end" they put on a restrictive muffler, increasing backpressure. While true, it does in fact increase back pressure, it will not do a thing to your low end. The only thing doing this would accomplish is choking the exhaust once you're in a high RPM range that could actually take advantage of the larger piping. It isn't so much that it improves low end, but actually that it hurts your top end making your low end seem better than without the muffler in comparison. So basically not only have you lost your low end by using too large of a diameter piping, but now you've hurt your top end by choking it with a restrictive muffler. :goyou:

[ICKY]

My N1 single turbo catback is loud as hell with headers on the freeway. I dont really care, i like the sound of it.

[mike13]

i cant believe the astounding amount of ignorance in this thread. even when solid proof from a freshalloy member is presented (and the same info is presented in a past issue of SCC), internet bench testers continue to rant and rave the kind of minsinformation that is all too commonly presented on these message boards.
rancid- no thanks for your insight. you are wrong.
jdm-drift- your ass dyno isnt a reputable source for data in an argument.

[Salty_X]

I think this speaks volumes... Bling (http://forums.freshalloy.com/ubbthreads/showflat.php?Cat=&Board=UBB9&Number=67651503&Forum=All_Forums&Words=pro%20racer&Match=Entire%20Phrase&Searchpage=1&Limit=25&Old=allposts&Main=67651483&Search=true)
Yeah, I think I'm going to have to side with Alex on this one. Sorry guys, but REAL DYNO > BUTT DYNO/THEORY DYNO

[RanciD]

i cant believe the astounding amount of ignorance in this thread. even when solid proof from a freshalloy member is presented (and the same info is presented in a past issue of SCC), internet bench testers continue to rant and rave the kind of minsinformation that is all too commonly presented on these message boards.
rancid- no thanks for your insight. you are wrong.
jdm-drift- your ass dyno isnt a reputable source for data in an argument.

Then an N1 isn't oversized for the engine. If you think you can just keep upping pipe diameter and getting gains all around you're mistaken though.

[Rennen]

i cant believe the astounding amount of ignorance in this thread. even when solid proof from a freshalloy member is presented (and the same info is presented in a past issue of SCC), internet bench testers continue to rant and rave the kind of minsinformation that is all too commonly presented on these message boards.
rancid- no thanks for your insight. you are wrong.
jdm-drift- your ass dyno isnt a reputable source for data in an argument.

While Alex's dyno tests do prove that a 3" exhaust will make gains all the way across the powerband, it does not prove that bigger is always better. It would have been nice for him to do an article for NPM comparing 2.5" NA piping vs. 3" turbo piping because for all we know the 2.5" could have higher gains....

Also, rancid is correct, making power through an exhaust is about maximizing the velocity through it. The velocity is affected by the pressure gradient, but is not solely dependent on it. For instance, a 0 backpressure setup of of no exhaust will lead to less power throughout most of the powerband.

-Matt

[jdm-drift]

i cant believe the astounding amount of ignorance in this thread. even when solid proof from a freshalloy member is presented (and the same info is presented in a past issue of SCC), internet bench testers continue to rant and rave the kind of minsinformation that is all too commonly presented on these message boards.
rancid- no thanks for your insight. you are wrong.
jdm-drift- your ass dyno isnt a reputable source for data in an argument.
wow what a cry baby, im not arguing with anyone i gave my opinion , people have those and guess what there not always gonna be the same as yours so go read your scc and post your "facts" and oh yeah stfu :bow:

[Bliss]

wow what a cry baby, im not arguing with anyone i gave my opinion , people have those and guess what there not always gonna be the same as yours so go read your scc and post your "facts" and oh yeah stfu :bow:

this isnt really an "opinion" topic. it is, or it isnt.