Apexi Catback N1 silencer backpressure/performance question! - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

SR240SXT · 06-26-2003, 03:34 PM

Hey guys, I recently bought an Apexi N1 Single Catback exhaust, and yes it is a 3". I know I know, 3" is for turbo, but hopefully in the future I'll have turbo, I just wanted to put everything on only once. I know the piping is too big for a N/A car, but will the silencer help it out as far as back pressure? Obviously it'll be quieter but judging from the pictures it looks like it restricts the airflow coming out significantly. Will this help my back pressure/low end performance? Thanks all.

heres a link to what it looks like, scroll down:

http://www.racerwheel.com/engine-exh...er--apexi.html

Dousan_PG · 06-26-2003, 03:36 PM

low end? yes it will be affected
top end will be nice though. some more power

it will be louder, so i can see a reason for using silencers. even with turbo its 'loud' but not as loud as NA.
just be careful of cops

made a good investment if you are planning on SR swap. enjoy it on your KA!

SR240SXT · 06-26-2003, 08:52 PM

ermmm thanks for the reply but my question wasn't really answered. I know its louder I already have it on the car..my question is about the silencer.

Steeles · 06-27-2003, 06:38 AM

please dont buy into the whole backpressure myth!

that said. your low end isnt affacted all that much anywayget the silencer if its too loud for you. try it with it in and out then decide for yourself. no one I know could tell a difference on NA cars.

CoasTek240 · 06-27-2003, 01:26 PM

ok i think he's trying to ask if the 3" piping on his turbo model N-1 is hurting the perforance of his car,

i have aquestion as to how the turbo model sound on an NA car. is is really messy sounding or deep, i bet it pops alot?

Steeles · 06-27-2003, 01:42 PM

deeper than a honda pops alot and is loud. I had the N1 dual it was deeper than single N1s i heard.. but its been awhile...

SR240SXT · 06-27-2003, 03:10 PM

yeah its pretty deep for a 4 cylinder, doesn't pop a LOT but a fair amount, and yeah its pretty loud especially with the windows up.

Zenki_S14 · 06-28-2003, 01:37 AM

I believe the silencer will give more back pressure, but the loudness will still be there. I've listened to a few types of exhausts (HKS, Apex'i, 5 Zigen) both 2.5 inch and 3 inch with silencers. Trust me, it's still kind of loud. In my opinion, i don't think you should get an exhaust for turbo until you have enough money to go turbo. I remember when i first bought my N1 2 1/2 years ago, i was in the phase of believing that one day i will swap in an SR20, but reality hits me and i realized that it's too complicated to have turbo. I don't think it's worth the trouble, especially when my car is daily driven. Be wise in your decision, it'll save you lots of money on the long run. I do LOVE the looks of my N1, though.

allmotorKA · 06-28-2003, 02:52 AM

On my KA the silencer killed the top end and did little for the low end...but it definately reduced the loudness.

misnomer · 06-28-2003, 03:12 AM

Uhhhhhhh, backpressure's bad mmkay?

Search , it's been covered more times than God.

Silencers will increase your backpressure (bad), but will really only effect your top end. The best way to quiet down your motor is a turbocharger :P

Muzzy · 06-28-2003, 11:41 PM

ok...real insight from an N/A guy...

ok i jus got my Nur Spec exhaust 2.75" piping (i know its not N1 Duals)
freshly rebuilt motor

ok whe i first got it it was great..tiny bit of low end loose but high was di-no-mite
it was fun drivin it around loud one day i felt like usin the scilencer cuz i was gonna drive for a while...it was nice and quiet...seemed to get a tiny bit of low end back but my top end fell..it suked ballz
i took it out and i could definately tell the difference
(not sound but power)

jus like allmotorKA said

WhiteNissanS13 · 06-29-2003, 11:33 AM

i have 3" piping on my car, its loud, but its relitively quiet with the silencer, and from my point of view the silencer the backpressure really increses around the town performance, but once you hit the freeway, acceleration sucks.

so for me,
silencer = quiet and good low-end performance
silencer off = Loud, but great freeway acceleration

Zenki_S14 · 06-29-2003, 12:08 PM

Didn't you have the silencer on at the first meet at Tea Station? If you did, it was still loud. But maybe you didn't have them on, so I dunno.

misnomer · 06-29-2003, 07:25 PM

Next person that says backpressure increases low end performance is gonna get smacked. I will look up your zilvia user info, find out where you live, drive over there and smack you. Hard. You will have a red spot, maybe even a bruise.

Backpressure == bad.

Just trying to save the world from missinformation :-) Search for "backpressure" and you'll find several long and drawn out topics explaining a bit of the physics that goes into exhausts. Be learned. Find the threads. Don't get smacked.

SR240SXT · 06-30-2003, 02:34 PM

Quote:

Originally posted by misnomer
Next person that says backpressure increases low end performance is gonna get smacked. I will look up your zilvia user info, find out where you live, drive over there and smack you. Hard. You will have a red spot, maybe even a bruise.

Backpressure == bad.

Just trying to save the world from missinformation :-) Search for "backpressure" and you'll find several long and drawn out topics explaining a bit of the physics that goes into exhausts. Be learned. Find the threads. Don't get smacked.

ay mang chill out, its all a learning process, you didn't know about this at one time either ya know.

CoasTek240 · 06-30-2003, 06:40 PM

yeah so its aiight to go with a 3" n-1 and run it on my NA for a couple monthes while i'm putting together my turbo setup?

SR240SXT · 06-30-2003, 07:23 PM

Quote:

Originally posted by CoasTek240
yeah so its aiight to go with a 3" n-1 and run it on my NA for a couple monthes while i'm putting together my turbo setup?

sure it is, I put mine on and still love it even though its not a turbo yet. I put my apexi n1 single with a cone filter on my stock intake piping and I felt a major difference in performance, it was like the engine could actually breathe now. Looks awesome too, all snug against the bumper and the angle is awesome.

WhiteNissanS13 · 07-01-2003, 12:09 AM

Quote:

Originally posted by Zenki_S14
Didn't you have the silencer on at the first meet at Tea Station? If you did, it was still loud. But maybe you didn't have them on, so I dunno.

i had it on when i came but it was off when i left.

sorry about saying anything about backpressure has some power but i remember reading in a magazine that when they had the silencer on it and dynoed it, DECREASED horsepower but INCREASED torque.

Steeles · 07-01-2003, 08:22 AM

Quote:

Originally posted by WhiteNissanS13
i had it on when i came but it was off when i left.

sorry about saying anything about backpressure has some power but i remember reading in a magazine that when they had the silencer on it and dynoed it, DECREASED horsepower but INCREASED torque.

yes yes what we are saying is learn why this happens and dont spread misinformation. backpressure is a bad by product of that situation. dont give the newbs the rope we will hang them with.

06-26-2003, 03:34 PM	#1
SR240SXT Zilvia Member Join Date: Jun 2002 Location: Orlando, FL Age: 41 Posts: 255 Trader Rating: (0) Feedback Score: 0 reviews	Apexi Catback N1 silencer backpressure/performance question! Hey guys, I recently bought an Apexi N1 Single Catback exhaust, and yes it is a 3". I know I know, 3" is for turbo, but hopefully in the future I'll have turbo, I just wanted to put everything on only once. I know the piping is too big for a N/A car, but will the silencer help it out as far as back pressure? Obviously it'll be quieter but judging from the pictures it looks like it restricts the airflow coming out significantly. Will this help my back pressure/low end performance? Thanks all. heres a link to what it looks like, scroll down: http://www.racerwheel.com/engine-exh...er--apexi.html __________________ -1997 240SX SE 5spd- -2002 Nissan OEM Gloss White Paint (June 2003) -OEM Nissan Front Lip -Type C Short Shifter -ApexI N1 Single Catback Exhaust -Test Pipe -Spec K Rear Wing -Kumho Supra Ecsta 712 ZR rated tires (205/55/16) -Eibach Pro Kit Springs -KYB AGX Struts -Llumar Centaur Premium Tint (28% front/20% back) -Alarm w/Keyless Entry -SOLD- Last edited by SR240SXT; 06-26-2003 at 03:36 PM..

06-26-2003, 03:36 PM	#2
Dousan_PG Post Whore! Join Date: May 2002 Location: Orange County, California Age: 46 Posts: 16,640 Trader Rating: (23) Rides Gallery: Dousan_PG Feedback Score: 23 reviews	low end? yes it will be affected top end will be nice though. some more power it will be louder, so i can see a reason for using silencers. even with turbo its 'loud' but not as loud as NA. just be careful of cops made a good investment if you are planning on SR swap. enjoy it on your KA! __________________ Aaron Pink GodziRa www.geocities.com/pink_godzira

06-26-2003, 08:52 PM	#3
SR240SXT Zilvia Member Join Date: Jun 2002 Location: Orlando, FL Age: 41 Posts: 255 Trader Rating: (0) Feedback Score: 0 reviews	ermmm thanks for the reply but my question wasn't really answered. I know its louder I already have it on the car..my question is about the silencer. __________________ -1997 240SX SE 5spd- -2002 Nissan OEM Gloss White Paint (June 2003) -OEM Nissan Front Lip -Type C Short Shifter -ApexI N1 Single Catback Exhaust -Test Pipe -Spec K Rear Wing -Kumho Supra Ecsta 712 ZR rated tires (205/55/16) -Eibach Pro Kit Springs -KYB AGX Struts -Llumar Centaur Premium Tint (28% front/20% back) -Alarm w/Keyless Entry -SOLD-

06-27-2003, 06:38 AM	#4
Steeles Post Whore! Join Date: Sep 2002 Location: 7th layer of hell, special pit of anger Age: 48 Posts: 3,785 Trader Rating: (0) Feedback Score: 0 reviews	please dont buy into the whole backpressure myth! that said. your low end isnt affacted all that much anywayget the silencer if its too loud for you. try it with it in and out then decide for yourself. no one I know could tell a difference on NA cars. __________________ Keeping it Godzira bishes. So I murdered another turbo

06-27-2003, 01:42 PM	#6
Steeles Post Whore! Join Date: Sep 2002 Location: 7th layer of hell, special pit of anger Age: 48 Posts: 3,785 Trader Rating: (0) Feedback Score: 0 reviews	deeper than a honda pops alot and is loud. I had the N1 dual it was deeper than single N1s i heard.. but its been awhile... __________________ Keeping it Godzira bishes. So I murdered another turbo

06-27-2003, 01:26 PM	#5
CoasTek240 Post Whore! Join Date: Jan 2002 Location: VA Age: 40 Posts: 3,034 Trader Rating: (3) Feedback Score: 3 reviews	ok i think he's trying to ask if the 3" piping on his turbo model N-1 is hurting the perforance of his car, i have aquestion as to how the turbo model sound on an NA car. is is really messy sounding or deep, i bet it pops alot?

06-27-2003, 03:10 PM	#7
SR240SXT Zilvia Member Join Date: Jun 2002 Location: Orlando, FL Age: 41 Posts: 255 Trader Rating: (0) Feedback Score: 0 reviews	yeah its pretty deep for a 4 cylinder, doesn't pop a LOT but a fair amount, and yeah its pretty loud especially with the windows up. __________________ -1997 240SX SE 5spd- -2002 Nissan OEM Gloss White Paint (June 2003) -OEM Nissan Front Lip -Type C Short Shifter -ApexI N1 Single Catback Exhaust -Test Pipe -Spec K Rear Wing -Kumho Supra Ecsta 712 ZR rated tires (205/55/16) -Eibach Pro Kit Springs -KYB AGX Struts -Llumar Centaur Premium Tint (28% front/20% back) -Alarm w/Keyless Entry -SOLD-

06-28-2003, 01:37 AM	#8
Zenki_S14 Zilvia Junkie Join Date: Oct 2002 Location: San Diego, CA Posts: 323 Trader Rating: (0) Feedback Score: 0 reviews	I believe the silencer will give more back pressure, but the loudness will still be there. I've listened to a few types of exhausts (HKS, Apex'i, 5 Zigen) both 2.5 inch and 3 inch with silencers. Trust me, it's still kind of loud. In my opinion, i don't think you should get an exhaust for turbo until you have enough money to go turbo. I remember when i first bought my N1 2 1/2 years ago, i was in the phase of believing that one day i will swap in an SR20, but reality hits me and i realized that it's too complicated to have turbo. I don't think it's worth the trouble, especially when my car is daily driven. Be wise in your decision, it'll save you lots of money on the long run. I do LOVE the looks of my N1, though.

06-28-2003, 02:52 AM	#9
allmotorKA Zilvia Member Join Date: Nov 2001 Location: SoCal Posts: 204 Trader Rating: (1) Feedback Score: 1 reviews	On my KA the silencer killed the top end and did little for the low end...but it definately reduced the loudness.

06-28-2003, 03:12 AM	#10
misnomer Nissanaholic! Join Date: Jul 2001 Location: Nevada Posts: 2,293 Trader Rating: (0) Feedback Score: 0 reviews	Uhhhhhhh, backpressure's bad mmkay? Search , it's been covered more times than God. Silencers will increase your backpressure (bad), but will really only effect your top end. The best way to quiet down your motor is a turbocharger :P __________________ Rowsdower saves us and saves all the world!

06-28-2003, 11:41 PM	#11
Muzzy Zilvia FREAK! Join Date: Jan 2003 Location: TX Posts: 1,555 Trader Rating: (0) Feedback Score: 0 reviews	ok...real insight from an N/A guy... ok i jus got my Nur Spec exhaust 2.75" piping (i know its not N1 Duals) freshly rebuilt motor ok whe i first got it it was great..tiny bit of low end loose but high was di-no-mite it was fun drivin it around loud one day i felt like usin the scilencer cuz i was gonna drive for a while...it was nice and quiet...seemed to get a tiny bit of low end back but my top end fell..it suked ballz i took it out and i could definately tell the difference (not sound but power) jus like allmotorKA said __________________ lemme have a dollar

06-29-2003, 11:33 AM	#12
WhiteNissanS13 Zilvia Addict Join Date: Aug 2002 Location: san diego, ca Age: 39 Posts: 619 Trader Rating: (0) Feedback Score: 0 reviews	i have 3" piping on my car, its loud, but its relitively quiet with the silencer, and from my point of view the silencer the backpressure really increses around the town performance, but once you hit the freeway, acceleration sucks. so for me, silencer = quiet and good low-end performance silencer off = Loud, but great freeway acceleration __________________

06-29-2003, 12:08 PM	#13
Zenki_S14 Zilvia Junkie Join Date: Oct 2002 Location: San Diego, CA Posts: 323 Trader Rating: (0) Feedback Score: 0 reviews	Didn't you have the silencer on at the first meet at Tea Station? If you did, it was still loud. But maybe you didn't have them on, so I dunno.

06-29-2003, 07:25 PM	#14
misnomer Nissanaholic! Join Date: Jul 2001 Location: Nevada Posts: 2,293 Trader Rating: (0) Feedback Score: 0 reviews	Next person that says backpressure increases low end performance is gonna get smacked. I will look up your zilvia user info, find out where you live, drive over there and smack you. Hard. You will have a red spot, maybe even a bruise. Backpressure == bad. Just trying to save the world from missinformation :-) Search for "backpressure" and you'll find several long and drawn out topics explaining a bit of the physics that goes into exhausts. Be learned. Find the threads. Don't get smacked. __________________ Rowsdower saves us and saves all the world!

06-30-2003, 06:40 PM	#16
CoasTek240 Post Whore! Join Date: Jan 2002 Location: VA Age: 40 Posts: 3,034 Trader Rating: (3) Feedback Score: 3 reviews	yeah so its aiight to go with a 3" n-1 and run it on my NA for a couple monthes while i'm putting together my turbo setup?