Open headers

pilot37 · March 5th, 2008, 11:26 PM

just curious:
how much hp gain with open headers?

mustangmanic · March 6th, 2008, 08:47 AM

Well, you cant run open stock headers.... and i would not suggest it on any engine smaller than a 350ci... you'll lose a tremendous amount of low end hp and tq and it sounds like complete ass on a 4.6 and especially a 3.8l v6

groundpounder · March 7th, 2008, 12:58 PM

who in their right mind would run open headers on a 3.8?

YOUCH! you want to talk about a bumblebee in heat! That would be it!

mustangmanic · March 7th, 2008, 10:12 PM

Originally Posted by groundpounder

who in their right mind would run open headers on a 3.8?

YOUCH! you want to talk about a bumblebee in heat! That would be it!

hahahaahh... dont get me wrong, i love all mustangs, i just wouldnt do anything but a deep chambered muffler or keep em stock on a 3.8L mustang lol....

blue88lx · March 10th, 2008, 09:33 PM

Lol, open headers w/ pissy neighbors are great. Had my xpipe off this weekend after I installed a new flywheel. i gave my neighbors a wake up call down the street at 8 am yesterday morning!

ohh, btw, open lt's or stocks on a v6 are a big no no. I wouldn't even put any louder than stock muffler on a sixxer. Go for the sleeper look and sound.

pilot37 · March 11th, 2008, 12:45 AM

lol-i wasnt actually thinkin of rippin off the exhaust

im plannin on a full MAC exhaust once i finally get a friggin job

i was j/c how much the pipes impeded the flow

stanglifemike · March 14th, 2008, 10:48 AM

You need that backpressure. I've heard a v6 with on manifold open, it sounded and performed like a turd

347stroker · March 16th, 2008, 06:20 PM

Originally Posted by blue88lx

Lol, open headers w/ pissy neighbors are great. Had my xpipe off this weekend after I installed a new flywheel. i gave my neighbors a wake up call down the street at 8 am yesterday morning!

ohh, btw, open lt's or stocks on a v6 are a big no no. I wouldn't even put any louder than stock muffler on a sixxer. Go for the sleeper look and sound.

Gotta love it haha, the people around my parents house are all old and bitchy. When I go see em I cant help but try and piss them off.

SquirrelCV · March 17th, 2008, 10:43 PM

It's not worth the noise and aggravation on a V6. You only really feel a gain with that on a larger engine or one with forced induction.

If you're still N/A, then open headers is more/less for intimidation only.

whitemustang02 · March 17th, 2008, 11:19 PM

I ran open headers on my six IMO the idle didn’t sound to bad but when you got on the gas it wasn’t so nice. And I will say that it did seam to feel like it had a little less power then with a full exhaust.

jdansby1 · March 18th, 2008, 12:30 PM

I had to run open headers due to my freakin cat breaking off my header, and white is right. It doesnt sound bad at idle, but getting on the gas is a different story. And it isnt legal anyways.

You will definitly notice a lose of low end power.

97GT4.6 · March 18th, 2008, 12:48 PM

Originally Posted by jdansby1

white is right.

LOL You racist

breakout831 · March 18th, 2008, 01:10 PM

The only car I've heard that sounded good with open headers was my buddy's LS1 camaro with LT headers. That thing was ridiculous.

TheBusher · March 18th, 2008, 04:16 PM

Originally Posted by breakout831

The only car I've heard that sounded good with open headers was my buddy's LS1 camaro with LT headers. That thing was ridiculous.

+1 I've heard an LS1 GTO straight out of LTs while the car and I were in a garage with concrete walls. Thing sounded NASTY!!! It was like thunder just at idle. And when it was reved...

whitemustang02 · March 18th, 2008, 04:23 PM

One of my friends had a 86 Chevy pick up with a built 454 in it and custom hooker open headers. Now that was just fucking bad ass.

March 5th, 2008, 11:26 PM	#1
pilot37 Regular 2000 v6 vert 3min 48 sec :) Join Date: Dec 2007 Location: Southern Cali Posts: 157	Open headers just curious: how much hp gain with open headers? __________________ 2000 v6 5spd atlantic blue vert w/ white leather

March 6th, 2008, 08:47 AM	#2
mustangmanic Hardcore Enthusiast 2002 Mustang GT 13.334 @ 106.57 Join Date: May 2007 Location: Indianapolis Posts: 2,492	Well, you cant run open stock headers.... and i would not suggest it on any engine smaller than a 350ci... you'll lose a tremendous amount of low end hp and tq and it sounds like complete ass on a 4.6 and especially a 3.8l v6 __________________ Accufab 75mm TB and Pleunm, JLT cai, Steeda Caster Chamber Plates, Eibach Sportline Springs, Tokico Shocks/Struts, FRPP Aluminum Driveshaft, FRPP 3.73's, Hooker LT's, Hooker O/R X, Pypes Violator Catback, SCT Xcal 2. 280rwhp

March 7th, 2008, 12:58 PM	#3
groundpounder Regular Join Date: Oct 2005 Posts: 94	who in their right mind would run open headers on a 3.8? YOUCH! you want to talk about a bumblebee in heat! That would be it! __________________ cheap fast reliable Pick two - Juggy

March 11th, 2008, 12:45 AM	#6
pilot37 Regular 2000 v6 vert 3min 48 sec :) Join Date: Dec 2007 Location: Southern Cali Posts: 157	lol-i wasnt actually thinkin of rippin off the exhaust im plannin on a full MAC exhaust once i finally get a friggin job i was j/c how much the pipes impeded the flow __________________ 2000 v6 5spd atlantic blue vert w/ white leather

March 14th, 2008, 10:48 AM	#7
stanglifemike MM Fanatic 06 GT & 98 GT Join Date: Dec 2006 Location: Douglasville, GA Posts: 3,208	You need that backpressure. I've heard a v6 with on manifold open, it sounded and performed like a turd __________________ 98 GT: Accufab, Steeda, BBk, Mac, FlowMaster, Moser, Ford Racing, American Racing, Nitto, Eibach, SCT, FPS 06 GT: JLT, SCT, FRPP/Borla, Pypes, Steeda, BamaChips RadMustangs Store

March 10th, 2008, 09:33 PM	#5
blue88lx Regular 88 lx hatch too slow Join Date: Mar 2008 Location: Mansfield, TX Posts: 51	Lol, open headers w/ pissy neighbors are great. Had my xpipe off this weekend after I installed a new flywheel. i gave my neighbors a wake up call down the street at 8 am yesterday morning! ohh, btw, open lt's or stocks on a v6 are a big no no. I wouldn't even put any louder than stock muffler on a sixxer. Go for the sleeper look and sound.

March 17th, 2008, 10:43 PM	#9
SquirrelCV Newbie 2000 Mustang GT 10's in April Join Date: Mar 2008 Location: CT Posts: 27	It's not worth the noise and aggravation on a V6. You only really feel a gain with that on a larger engine or one with forced induction. If you're still N/A, then open headers is more/less for intimidation only.

March 18th, 2008, 01:10 PM	#13
breakout831 Enthusiast 2006 Nissan 350Z Join Date: Dec 2006 Location: Central Florida Posts: 885	The only car I've heard that sounded good with open headers was my buddy's LS1 camaro with LT headers. That thing was ridiculous.

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