X- pipe exhaust

sportsfan · 10-02-2012, 10:53 AM

I am considering installing an X-pipe exhaust system(without mufflers) on a Chevelle with a SBC.Now I am using headers with bullet mufflers.I have read that I will pickup HP,but will there be any performance gains after adding the extra weight of the new exhaust system?

randy wilson · 10-02-2012, 11:01 AM

We picked up .3 in the eighth with a flat top, 336 69 nova, with cast manifolds. The weight did not hurt it. Would expect something even with headers. Someone else may have more input.

Footbrake · 10-05-2012, 04:36 AM

My car runs .1-.15 faster in the 1/8 with 3" x pipe and mufflers with turndowns, than with open headers. There's something to that technology I guess

Jeff Stout · 10-05-2012, 11:40 AM

Had bullets about mid car. Went to full exhuast out the back with x-pipe in proper location. Gained 45 lbs weight and picked up .04 et. sbc

Ed Wright · 10-05-2012, 02:14 PM

Jeff, how can you be sure about four hundredths, week-to-week. Surely you didn't back-to-back that system at the track, same day?

7423 · 10-05-2012, 09:40 PM

Quote:

Originally Posted by Ed Wright

Jeff, how can you be sure about four hundredths, week-to-week. Surely you didn't back-to-back that system at the track, same day?

I have 3" collectors into a 3" X pipe and into a pair of dual chamber Flowmaster mufflers with turn downs. X pipe and mufflers weigh 44lbs.
Remove the system and run open headers with a collector extension, add 40lbs of lead and the car runs .10 slower et and 1.5 mph slower.
That was a back to back test, within 45 minutes. I have done this several times.
X pipe and mufflers, would not leave home without them.

sportsfan · 10-05-2012, 10:43 PM

OK, I'm sold on the benefits of the X pipe.Should I use my bullet mufflers or just turn downs? Or test both combos?

10-02-2012, 10:53 AM	#1
sportsfan Junior Member Join Date: Aug 2004 Location: Somerville,New Jersey Posts: 34 Likes: 0 Liked 0 Times in 0 Posts	X- pipe exhaust I am considering installing an X-pipe exhaust system(without mufflers) on a Chevelle with a SBC.Now I am using headers with bullet mufflers.I have read that I will pickup HP,but will there be any performance gains after adding the extra weight of the new exhaust system?

10-02-2012, 11:01 AM	#2
randy wilson Senior Member Join Date: Jan 2007 Location: N/A Posts: 882 Likes: 0 Liked 20 Times in 20 Posts	Re: X- pipe exhaust We picked up .3 in the eighth with a flat top, 336 69 nova, with cast manifolds. The weight did not hurt it. Would expect something even with headers. Someone else may have more input. __________________ don,t have one

10-05-2012, 04:36 AM	#3
Footbrake Junior Member Join Date: Dec 2007 Location: Tonawanda, N.Y. Posts: 35 Likes: 0 Liked 0 Times in 0 Posts	Re: X- pipe exhaust My car runs .1-.15 faster in the 1/8 with 3" x pipe and mufflers with turndowns, than with open headers. There's something to that technology I guess

10-05-2012, 11:40 AM	#4
Jeff Stout VIP Member Join Date: Dec 2001 Location: phoenix Posts: 1,422 Likes: 54 Liked 665 Times in 262 Posts	Re: X- pipe exhaust Had bullets about mid car. Went to full exhuast out the back with x-pipe in proper location. Gained 45 lbs weight and picked up .04 et. sbc

10-05-2012, 02:14 PM	#5
Ed Wright Veteran Member Join Date: Mar 2005 Location: Sand Springs, OK Posts: 8,132 Likes: 896 Liked 389 Times in 168 Posts	Re: X- pipe exhaust Jeff, how can you be sure about four hundredths, week-to-week. Surely you didn't back-to-back that system at the track, same day? __________________ Ed Wright 4156 SS/JA

10-05-2012, 10:43 PM	#7
sportsfan Junior Member Join Date: Aug 2004 Location: Somerville,New Jersey Posts: 34 Likes: 0 Liked 0 Times in 0 Posts	Re: X- pipe exhaust OK, I'm sold on the benefits of the X pipe.Should I use my bullet mufflers or just turn downs? Or test both combos?