Question on headers for 2011 5.0

2011P51GT · 2012-01-29 21:52:27

http://www.americanracingheaders.com/Dyno_Sheet_2011_Mustang_5_0.htm ARH shows 32 RWHP before the tune! It is true! http://a4.sphotos.ak.fbcdn.net/hphotos-ak-ash4/428734_10150605812560141_501280140_11031100_1954904943_n.jpg

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01-30-2012, 07:59 PM

#11

mtflyboy25

3rd Gear Member

Join Date: Aug 2010

Location: AZ - Arizona

Posts: 779

http://www.americanracingheaders.com...ustang_5_0.htm

ARH shows 32 RWHP before the tune! It is true!

Last edited by mtflyboy25; 01-30-2012 at 08:17 PM.

01-31-2012, 10:17 AM

#12

Mishri

Mish-ogynist

Join Date: Nov 2007

Location: Helena, MT

Posts: 3,780

It's been awhile since I last looked up results on LT header's dyno #s but I've never seen anyone gain anywhere near that even with a tune and full exhaust, let alone headers only on the 5.0. I call BS, find sources other than the manufacturer's dyno results. I'm pretty sure what ive seen is .1-.2 and 10-15whp gained over having o/r X and cai.

Likely what they didn't post is that they cut the cats out of the stock mid-pipe to get the LT headers to fit. i'm still not buying 32rwhp untuned gains though.

01-31-2012, 12:01 PM

#13

jamesfs912

Join Date: Jan 2010

Location: US-VA

Posts: 9

Quote:

Originally Posted by Mishri

Likely what they didn't post is that they cut the cats out of the stock mid-pipe to get the LT headers to fit. i'm still not buying 32rwhp untuned gains though.

Definitely no cats +1

01-31-2012, 01:14 PM

#14

Burns331

2nd Gear Member

Join Date: Jun 2010

Location: iowa

Posts: 187

Quote:

Originally Posted by cjs06

The sound is the biggest factor with long-tubes; I still use my factory mid-pipes and my exhaust is deceivingly quite. Great melow note at low rpms, noticeable, but not loud. After 3K rpms the raspy growl note comes on and anything over 5K sounds insane.

I did notice I got alot of torque back from when I replaced my intake too; power is still very peaky over 7K.

Whats your car putting to the rollers with all the mods in your sig?

02-01-2012, 11:38 PM

#15

cjs06

2nd Gear Member

Join Date: May 2010

Location: GA

Posts: 182

Quote:

Originally Posted by Burns331

Whats your car putting to the rollers with all the mods in your sig?

No idea. Eventually I'm going to find time to get it dynoed and I'll post the results. Not sure what to expect with a automatic, but from what I read there is about a 12% drivetrain loss.

02-03-2012, 10:25 AM

#16

Mishri

Mish-ogynist

Join Date: Nov 2007

Location: Helena, MT

Posts: 3,780

i would guess you are sitting around 415-420whp. if you had an off-road X i'd add 10whp to that figure.

i'd also guess with drag radials and good DA you would be running around 11.7@117mph in the 1/4.

02-03-2012, 12:37 PM

#17

cjs06

2nd Gear Member

Join Date: May 2010

Location: GA

Posts: 182

Quote:

Originally Posted by Mishri

I've walked cars with 425whp before my headers and they had a very similar weight/ power ratio as my car, that throws off my guesses for what I'm putting down to the rear, especially now with headers cause there is a discernible difference in pull.

I got some 325 mickeys on the way and pretty soon I'm going to try and replace the 3.15 gears with 3.73s. I'm hoping that should give me some respectable time-slips.