OBX race header installed driving impressions... - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

SilviaSR20DET · 06-30-2004, 12:02 AM

Well i finished installing my obx race header correctly because before i didnt have the right o2 sensor to fit. Its on a 96 240sx 5sp with injen cai and apexi n1 dual. Driving daily is much more smoother and responsive and on the freeway in fifth gear pulls real hard. What i noticed is that before i use to have this surge of power after 3500 rpm but now the power is throughout the rpm band which i wanted. The sound is noticeably louder but not too bad once your cruising but it sounds so nice. The only problem is that the egr doesnt really quite fit but i just use foil tape to wrap around the egr just in case. Overall the header bolts on pretty well and so far no flaws that i see. Im hoping to run my car at the track with this new mod.

nightwalker · 06-30-2004, 12:09 AM

...I thought you had a SilviaSR20DET???

SilviaSR20DET · 06-30-2004, 12:26 AM

HAHA my bad i had this screename for along time and i dont want to change it.

gogeeta13 · 06-30-2004, 10:18 AM

where did you get it? how much?

SilviaSR20DET · 06-30-2004, 10:39 AM

I got it from ebay for 200 bucks shipped pretty good deal id have to say.

psychedelicbeats · 06-30-2004, 10:47 AM

15.74 isn't bad.... makes me wanna beat out my friend's 91 supra with a 7gmte in it. she pulls 15.35 running on jdm stock everything... hopefully i can pull something off with my automagic + rev cut switch LOL

old_s13 · 06-30-2004, 10:51 AM

hopefully i can pull something off with my automagic + rev cut switch LOL

yeah.. have fun running 17s.

ch1873857 · 06-30-2004, 11:00 AM

jdm stock everything? could you please explain whats so jdm about a stock supra?

Startours7 · 06-30-2004, 11:16 AM

Just an update.
It's been a few mounths scence I installed an obx header on my 92.
Now the egr is recieving no backpressure.
Don't know why but now it throws the check engine light about 2 min after I reset the ecu.
Also after two or so weeks I noticed that The mani stud closest to the front of the car had broken. Mabey I over tightened the nuts. I couldn't get a torque wrinch on all the nuts but one.
Just something to think about.
Dave

nightwalker · 06-30-2004, 11:18 AM

seriously though, it's good to hear good things about one of the few available headers for the KA

papershot · 06-30-2004, 11:32 AM

Doesn't anyone use the Greddy headers? I've got them...

Andrew Bohan · 06-30-2004, 12:16 PM

Quote:

Originally Posted by ch1873857

jdm stock everything? could you please explain whats so jdm about a stock supra?

means the guy just swapped stock jdm stuff in...
it's no longer usdm stock

old_s13 · 06-30-2004, 04:08 PM

Quote:

Originally Posted by Startours7

Just an update.
It's been a few mounths scence I installed an obx header on my 92.
Now the egr is recieving no backpressure.
Don't know why but now it throws the check engine light about 2 min after I reset the ecu.
Also after two or so weeks I noticed that The mani stud closest to the front of the car had broken. Mabey I over tightened the nuts. I couldn't get a torque wrinch on all the nuts but one.
Just something to think about.
Dave

first of all, why does an EGR need backpressure? all the egr does/is, is a valve that opens up to allow exhaust gas back into the intake manifold. unless the pipe is closed, the egr should be recieving gasses from your exhaust.

second, the egr is a royal pain in the ass. how can you install a header and want to keep the egr? for smog? for what? you cant take your car to a smog check station out here in CA with a header, it wont pass. the egr is crap.. i would have capped off the EGR port a LONG time ago and put a block plate on the back.

BUT, since you plan on keeping it. know, that when you increase your exhaust flow.. (header, exhaust, etc) from what I've heard.. the BPT (which controls the egr) acts all finicky. All I know is that for the life of me, I couldnt get the EGR system to work once I had intake, headers, and exhaust. From everything Ive read, the BPT/EGR system needs some backpressure to operate properly. too little backpressure and it doesnt work right.

personally, i ditched all the logic and trashed the system long ago because it did nothing more than complicate my life and make it miserable. I hate that damn pipe in the back of the motor, its impossible to access and is always rusted on with exhaust crud. SO, goodbye egr.. goodbye aiv, goodbye charcoal canister -- hello empty engine bay. ECU codes? shit, ditch the check engine light while yer at it.. dont need that crap. want to check your engine? pop your hood, make sure its still there.

seriously, make room for important stuff like oil pressure gauge, water temp gauge, stuff that monitors the motor.. not all that useless emissions junk. just keep your cat and you're smog-compatible (enough)

SimpleS14 · 06-30-2004, 07:02 PM

I have the same header on my car...and I like them too. The EGR tube was a PITA...I got it in there just enough. Since my car was automatic...I was dying to shift to a fifth gear after I'm doing 80+ at 3.5k rpms. Now my car is 5-spd...but I have yet to get it running. :/

SilviaSR20DET · 06-30-2004, 08:37 PM

psychedelicbeats, that 15.74 is with only intake and exhaust just to let you know. That time was with a 2.4 60 ft which is horrible for a rwd car. Im pretty sure i can hit low 15s with traction and my new race header.

old_s13 · 06-30-2004, 09:29 PM

am i the only one who noticed that "race header" and "egr" should never be used in the same thread?

hehe seriously.. why would anyone install a header and KEEP the crappy egr... hmm

***S14DB*** · 06-30-2004, 09:36 PM

Quote:

Originally Posted by papershot

Doesn't anyone use the Greddy headers? I've got them...

I'm sorry. It's just tube version of the stock mani. connects to the cat. I haven't seen a good dyno pull on them yet.

I love my OBX on the freeway too. Passing power!!! you can also blip the gas and surge forward.

ch1873857 · 06-30-2004, 09:45 PM

why didnt they make the for the s13? they look good

06-30-2004, 12:02 AM	#1
SilviaSR20DET Zilvia FREAK! Join Date: Mar 2002 Location: Seattle, WA Posts: 1,221 Trader Rating: (9) Feedback Score: 9 reviews	OBX race header installed driving impressions... Well i finished installing my obx race header correctly because before i didnt have the right o2 sensor to fit. Its on a 96 240sx 5sp with injen cai and apexi n1 dual. Driving daily is much more smoother and responsive and on the freeway in fifth gear pulls real hard. What i noticed is that before i use to have this surge of power after 3500 rpm but now the power is throughout the rpm band which i wanted. The sound is noticeably louder but not too bad once your cruising but it sounds so nice. The only problem is that the egr doesnt really quite fit but i just use foil tape to wrap around the egr just in case. Overall the header bolts on pretty well and so far no flaws that i see. Im hoping to run my car at the track with this new mod. Last edited by SilviaSR20DET; 06-30-2004 at 12:27 AM..

06-30-2004, 12:09 AM	#2
nightwalker Nissanaholic! Join Date: Mar 2003 Location: Bay area Age: 46 Posts: 2,146 Trader Rating: (0) Feedback Score: 0 reviews	...I thought you had a SilviaSR20DET??? __________________ In life, we often cast the line of hope fishing for the best possible opportunity. Sometimes with enough effort, the things we catch are nothing short of amazing.

06-30-2004, 10:18 AM	#4
gogeeta13 Zilvia Member Join Date: Sep 2003 Location: Columbus, OH Posts: 202 Trader Rating: (0) Feedback Score: 0 reviews	where did you get it? how much? __________________ 1996 Maxima 5 speed 1993 Altima SE ------------------------- 1993 240sx Base - SOLD [Blacktop and such] 1992 240sx Base - SOLD [Road Race/Auto X Beast] 1993 240sx Hicas - SOLD 2001 Xterra SE V6 4x4 5 speed - SOLD

06-30-2004, 11:16 AM	#9
Startours7 Leaky Injector Join Date: Jan 2003 Location: SanDiego Age: 42 Posts: 93 Trader Rating: (0) Feedback Score: 0 reviews	Just an update. It's been a few mounths scence I installed an obx header on my 92. Now the egr is recieving no backpressure. Don't know why but now it throws the check engine light about 2 min after I reset the ecu. Also after two or so weeks I noticed that The mani stud closest to the front of the car had broken. Mabey I over tightened the nuts. I couldn't get a torque wrinch on all the nuts but one. Just something to think about. Dave __________________ 92'240sx fb 77'280z Motor all done, now the rest 87'Ram 250, 383 4 speed, 4x4(sold to my pop's) 97'Hardbody, 4x4(new toy)

06-30-2004, 11:18 AM	#10
nightwalker Nissanaholic! Join Date: Mar 2003 Location: Bay area Age: 46 Posts: 2,146 Trader Rating: (0) Feedback Score: 0 reviews	seriously though, it's good to hear good things about one of the few available headers for the KA __________________ In life, we often cast the line of hope fishing for the best possible opportunity. Sometimes with enough effort, the things we catch are nothing short of amazing.

06-30-2004, 12:26 AM	#3
SilviaSR20DET Zilvia FREAK! Join Date: Mar 2002 Location: Seattle, WA Posts: 1,221 Trader Rating: (9) Feedback Score: 9 reviews	HAHA my bad i had this screename for along time and i dont want to change it.

06-30-2004, 10:39 AM	#5
SilviaSR20DET Zilvia FREAK! Join Date: Mar 2002 Location: Seattle, WA Posts: 1,221 Trader Rating: (9) Feedback Score: 9 reviews	I got it from ebay for 200 bucks shipped pretty good deal id have to say.

06-30-2004, 10:47 AM	#6
psychedelicbeats Zilvia Addict Join Date: May 2003 Location: Southern CA Age: 40 Posts: 823 Trader Rating: (0) Feedback Score: 0 reviews	15.74 isn't bad.... makes me wanna beat out my friend's 91 supra with a 7gmte in it. she pulls 15.35 running on jdm stock everything... hopefully i can pull something off with my automagic + rev cut switch LOL

06-30-2004, 10:51 AM	#7
old_s13 BANNED Join Date: Nov 2001 Location: Los Angeles, CA. Posts: 2,824 Trader Rating: (0) Feedback Score: 0 reviews	hopefully i can pull something off with my automagic + rev cut switch LOL yeah.. have fun running 17s.

06-30-2004, 11:00 AM	#8
ch1873857 Nissanaholic! Join Date: Sep 2003 Location: Andrews Air Force Base Posts: 1,906 Trader Rating: (1) Feedback Score: 1 reviews	jdm stock everything? could you please explain whats so jdm about a stock supra?

06-30-2004, 11:32 AM	#11
papershot Zilvia Junkie Join Date: May 2004 Location: CT Posts: 368 Trader Rating: (0) Feedback Score: 0 reviews	Doesn't anyone use the Greddy headers? I've got them...

06-30-2004, 07:02 PM	#14
SimpleS14 Post Whore! Join Date: Feb 2002 Location: Philly Age: 42 Posts: 9,185 Trader Rating: (0) Rides Gallery: SimpleS14 Feedback Score: 0 reviews	I have the same header on my car...and I like them too. The EGR tube was a PITA...I got it in there just enough. Since my car was automatic...I was dying to shift to a fifth gear after I'm doing 80+ at 3.5k rpms. Now my car is 5-spd...but I have yet to get it running. :/ __________________ *Goals are dreams with a deadline.* L.H.O.O.Q.

06-30-2004, 08:37 PM	#15
SilviaSR20DET Zilvia FREAK! Join Date: Mar 2002 Location: Seattle, WA Posts: 1,221 Trader Rating: (9) Feedback Score: 9 reviews	psychedelicbeats, that 15.74 is with only intake and exhaust just to let you know. That time was with a 2.4 60 ft which is horrible for a rwd car. Im pretty sure i can hit low 15s with traction and my new race header.

06-30-2004, 09:29 PM	#16
old_s13 BANNED Join Date: Nov 2001 Location: Los Angeles, CA. Posts: 2,824 Trader Rating: (0) Feedback Score: 0 reviews	am i the only one who noticed that "race header" and "egr" should never be used in the same thread? hehe seriously.. why would anyone install a header and KEEP the crappy egr... hmm

06-30-2004, 09:45 PM	#18
ch1873857 Nissanaholic! Join Date: Sep 2003 Location: Andrews Air Force Base Posts: 1,906 Trader Rating: (1) Feedback Score: 1 reviews	why didnt they make the for the s13? they look good