X-pipe experience - The 1947 - Present Chevrolet & GMC Truck Message Board Network

dznucks · 02-08-2006, 04:54 PM

i have a '69 C-10 w/350 and i am about to have new exhaust put in. i am currently running a "H" pipe but i plan to go to an X-pipe instead. Does anyone have any experience with installing x-pipes? more specifically, where to place the x-pipe. I understand that there is an optimum location to place it, but how do you find that location?

thanks

barn9 · 02-08-2006, 05:19 PM

Do a search, this has been discussed around here over the years countless times. The function of either is to equalize pressure, and IMO the H pipe does it equally as well as an X pipe, so why go to the extra expense and trouble of creating an X when the H does the job. Some purests seem to think that the position, etc., can increase HP, but really, any difference would be measured in very small numbers. HP is made by the engine IMO, and exhaust tweaks are not that significant when it comes to either an H or X pipe. You will be both fine and happy with the H pipe, and maybe have a little more money in your pocket.

dznucks · 02-08-2006, 05:41 PM

i appreciate you insight. the h pipe works fine and it does equalize the pressure, but the x-pipe has a few benefits over the h pipe. for one it is designed not to inhibit the flow while equalizing the pressure. placing the x-pipe in the correct location (ie. where the exhaust gases begin to slow and the exhuast pressure begins to drop) will enhance the breathing capabilities of the engine. its complicated to explain, but you have to understand thermal and fluid dynamics.

you are right the gains from doing this will appear insignificant during average city driving. however, this truck is my only vehicle and i put about 600 highway miles a week on it. i am in search of every last bit of fuel milage i can scrounge. this (in combination with headers) should up my highway milage at least by 2 mpg. it already gets 18 mpg highway with a new jasper 350, mild cam, 3-speed, holley 600, and a trashed exhaust system.

Chevrolet4x4s · 02-08-2006, 06:03 PM

Is your truck 2wd or 4wd?Also is it true that an H pipe wile make your vehicle sound better(louder)?
Thanks
Shane

dznucks · 02-08-2006, 09:08 PM

its 2wd. i do not want it louder. i have too many driving awards as it is.

dznucks · 02-08-2006, 09:17 PM

does any one have pictures of a '68-'72 with an x-pipe incorp'd in the exhaust system?

pebbleboy · 02-08-2006, 09:56 PM

How about this one?

http://67-72chevytrucks.com/vboard/s...d.php?t=148950
Page 8

jimfulco · 02-08-2006, 10:11 PM

An X-pipe makes the exhaust sound smoother and less burbly. It causes each muffler to see pulses from all 8 cylinders instead of just 4 (that aren't firing evenly), and a sound with more pulses is easier to quiet. Seems to me the shorter the crossover on an H-type system, the closer to the X-type sound comes out.

Burbly is a word, right?

EyeH8the24 · 02-08-2006, 10:21 PM

i have never ran one on a truck yet.....yet........but have on my race cars...both dirt and asphalt...they deffinatly make one sound better....and i think add a lil bottom end power...least on the asphalt car it did ....hard to tell on a dirt car

79BIG10 · 02-09-2006, 09:27 PM

I've got one on my truck and really balanced out the cam being lopey. You can still hear it but not as defined as before.

Greubin · 01-13-2007, 03:53 PM

I recently bought the Summit Racing x-pipe kit. I've been researching where to locate the x-pipe, everything I've read seems to point to the crayon method and locating the x where the crayon stops melting. Ok - that sounds good, but on my longbed, that point is right in front of my current muffler location which is just in front of the rear axle. Summits instructions have the kit installed just at the header collector. I want to make sure before I start hacking my pipes...

Any thoughts?

LUV2XCLR8 · 01-13-2007, 04:00 PM

Kit I may go with on my 2wd Blammy

Boise69 · 01-13-2007, 04:06 PM

Quote:

Originally Posted by LUV2XCLR8

Kit I may go with on my 2wd Blammy

"Blammy" -

smoked68 · 01-14-2007, 12:08 AM

x pipe: loud high pitch raspy
h pipe: loud deep tone (sounds alot better IMO)
nerver heard that an x would give you better gas mileage though...

49studebaker · 01-14-2007, 11:46 AM

I read an article on them some time back, it seemed that the colser to the header, the better. I remember thinking I didn't really have room to put it in the optimal position. I didn't want it under my transmission pan for obvious reasons. I believe they do help with exhaust scavaging and also that an x pipe will allow a smoother transitions from one side to the other, rather than 90 degree turns for an H pipe.

kbs71 · 01-14-2007, 12:32 PM

I had an entire exhaust put on my truck this past summer. the x pipe is located just aft of the tranny tail shaft.
Rasphy sound NO WAY. It has a nice deep mellow tone. I'm running magnaflows with 2.5 stainless tubing coming out of stock rams horn manifolds. I noyiced a slight increse in gas milage (@ 2 to 3 mpg) and a large increase in performance. I'm extraemly glad i chose the x pipe over the H pipe. From what I've read the x pipe help scavange the exhaust better than an h pipe. The h pipe just more or less just equalizes the pressures between the two sides helping the sound better with the off phase cylinder firing. Whereas the x pipe actually uses an venturi type effect to help scavange (suck out) the exhaust gasses from the oppisite side.

Boise69 · 01-14-2007, 12:41 PM

kbs71 - thanks for that info, it helps clear things up for me considering i'm facing the same job. Can you take some pictures of your set-up and can you give us more details including cost or materials, install? Magnaflow part numbers? I'm leaning in the same direction of yours with the exception of headers instead of Rams.

thanks

kbs71 · 01-14-2007, 01:32 PM

OK so I got a new camera this Christmas and you made me go out on my socks in the wet cocncreted to the garage and get these pictures for you after working all night long.

gmc67swb · 01-14-2007, 01:58 PM

Maybe put it where you can still remove the tranny easily? Other wise you will be taking your exhaust apart to get the tranny out.

smoked68 · 01-14-2007, 02:27 PM

my experience with x/h pipes have been with mustang so i guess it may be diff with these trucks but I thought it would be the same...

Boise69 · 01-14-2007, 02:28 PM

Quote:

Originally Posted by kbs71

OK so I got a new camera this Christmas and you made me go out on my socks in the wet cocncreted to the garage and get these pictures for you after working all night long.

well... you shouldnt have written such good info

pics pics pics please.

I have a dilema, one of my mufflers rusted out on my daily driver and i dont know if i should weld in a new one from ebay or just decide nows the time to tear into her and start my, what i believe, 1 year restore. but nonetheless, she will be getting a whole new exhaust. I'm very curious about the magnaflow X pipe system. so if you please...

02-08-2006, 04:54 PM	#1
dznucks Registered User Join Date: Feb 2006 Location: Smyrna, Ga Posts: 1,647	X-pipe experience i have a '69 C-10 w/350 and i am about to have new exhaust put in. i am currently running a "H" pipe but i plan to go to an X-pipe instead. Does anyone have any experience with installing x-pipes? more specifically, where to place the x-pipe. I understand that there is an optimum location to place it, but how do you find that location? thanks

02-08-2006, 05:19 PM	#2
barn9 Half a bubble off! Join Date: Jun 2000 Location: Winfield, Ks, USA Posts: 5,588	Re: X-pipe experience Do a search, this has been discussed around here over the years countless times. The function of either is to equalize pressure, and IMO the H pipe does it equally as well as an X pipe, so why go to the extra expense and trouble of creating an X when the H does the job. Some purests seem to think that the position, etc., can increase HP, but really, any difference would be measured in very small numbers. HP is made by the engine IMO, and exhaust tweaks are not that significant when it comes to either an H or X pipe. You will be both fine and happy with the H pipe, and maybe have a little more money in your pocket. __________________ Just call me LB. '71 Cheyenne, 402BB, hauls blondes, brunettes, or redheads.

02-08-2006, 05:41 PM	#3
dznucks Registered User Join Date: Feb 2006 Location: Smyrna, Ga Posts: 1,647	Re: X-pipe experience i appreciate you insight. the h pipe works fine and it does equalize the pressure, but the x-pipe has a few benefits over the h pipe. for one it is designed not to inhibit the flow while equalizing the pressure. placing the x-pipe in the correct location (ie. where the exhaust gases begin to slow and the exhuast pressure begins to drop) will enhance the breathing capabilities of the engine. its complicated to explain, but you have to understand thermal and fluid dynamics. you are right the gains from doing this will appear insignificant during average city driving. however, this truck is my only vehicle and i put about 600 highway miles a week on it. i am in search of every last bit of fuel milage i can scrounge. this (in combination with headers) should up my highway milage at least by 2 mpg. it already gets 18 mpg highway with a new jasper 350, mild cam, 3-speed, holley 600, and a trashed exhaust system.

02-08-2006, 06:03 PM	#4
Chevrolet4x4s Registered User Join Date: Nov 2005 Location: WV Posts: 227	Re: X-pipe experience Is your truck 2wd or 4wd?Also is it true that an H pipe wile make your vehicle sound better(louder)? Thanks Shane __________________ 1993 K1500 350 5 speed 1985 K10 Silverado Vortec 406 5 speed (in body shop) "I been drivin' this '85 pickup truck Them buddies of mine call it a bucket of rust She's a little beat up but she still runs like the wind Yeah, kinda like me I been banged and bruisedBeen around the block a time or two But I'm runnin' like new goin' places I never been No, I ain't broke I'm just broken in" 1963 Dodge Townwagon(its amazng what 30 years and zero miles will do to a vehicle ) Member#20327

02-08-2006, 09:08 PM	#5
dznucks Registered User Join Date: Feb 2006 Location: Smyrna, Ga Posts: 1,647	Re: X-pipe experience its 2wd. i do not want it louder. i have too many driving awards as it is.

02-08-2006, 09:17 PM	#6
dznucks Registered User Join Date: Feb 2006 Location: Smyrna, Ga Posts: 1,647	Re: X-pipe experience does any one have pictures of a '68-'72 with an x-pipe incorp'd in the exhaust system?

02-08-2006, 10:11 PM	#8
jimfulco Registered User Join Date: May 2003 Location: Shreveport LA Posts: 3,170	Re: X-pipe experience An X-pipe makes the exhaust sound smoother and less burbly. It causes each muffler to see pulses from all 8 cylinders instead of just 4 (that aren't firing evenly), and a sound with more pulses is easier to quiet. Seems to me the shorter the crossover on an H-type system, the closer to the X-type sound comes out. Burbly is a word, right?

02-08-2006, 10:21 PM	#9
EyeH8the24 Registered User Join Date: Dec 2004 Location: beulah,alabama Posts: 1,075	Re: X-pipe experience i have never ran one on a truck yet.....yet........but have on my race cars...both dirt and asphalt...they deffinatly make one sound better....and i think add a lil bottom end power...least on the asphalt car it did ....hard to tell on a dirt car

02-09-2006, 09:27 PM	#10
79BIG10 I'm back with 2nd truck! Join Date: Feb 2002 Location: Texas Posts: 3,774	Re: X-pipe experience I've got one on my truck and really balanced out the cam being lopey. You can still hear it but not as defined as before. __________________ 1979 Chevrolet Bonanza Big10 "Tootsie Roll" 1985 Chevrolet Silverado (wife's) Member of the Southern Bowties Club "Don't underestimate how sexy a fat man who drinks to excess can be." Homer Simpson

01-13-2007, 03:53 PM	#11
Greubin Registered User Join Date: Dec 2005 Location: SJC Posts: 158	Re: X-pipe experience I recently bought the Summit Racing x-pipe kit. I've been researching where to locate the x-pipe, everything I've read seems to point to the crayon method and locating the x where the crayon stops melting. Ok - that sounds good, but on my longbed, that point is right in front of my current muffler location which is just in front of the rear axle. Summits instructions have the kit installed just at the header collector. I want to make sure before I start hacking my pipes... Any thoughts? __________________ ___________ Greubin '71 C20 custom - GM Crate 350CI/290HP, BTO 700R4 level II, Qjet, and HEI

01-13-2007, 04:00 PM	#12
LUV2XCLR8 The LuvShack Garage Join Date: Jan 2004 Location: Maple Grove, TN (West Side) Posts: 30,468	Re: X-pipe experience Kit I may go with on my 2wd Blammy Attached Images __________________ Owner/Op: "TN Classic Transport Carriers" The Toy: "Square Vette" 72 Hybrid Blazer Toy Barn: "LuvShack" 40 x 60 x 20 Shop Tow Piggy:"Maddy" 88 Silverado 3500 Hauler: "Feathers" 14 Aluma 8218T

01-14-2007, 12:08 AM	#14
smoked68 Registered User Join Date: Oct 2006 Location: Rock Hill, SC Posts: 421	Re: X-pipe experience x pipe: loud high pitch raspy h pipe: loud deep tone (sounds alot better IMO) nerver heard that an x would give you better gas mileage though... __________________ 1968 chevy shortbed, Dark Shadow Gray 4 bolt 383 Stroker,Weiand Super Charger, disc brakes, 9 inch, 391 gear, 20" Eagle wheels, muncie 4 speed/ Hurst shifter, 4/7 drop, Hedman midlengths, 3 inch exhaust w/ 2 chamber flows. 1966 Mustang with 306 roller, c-4, 9 inch Detroit locker rear. 1965 Fastback Mustang w/347 stroker, top loader 4spd, 9 inch detroit locker. 1966 Mustang coup, 306 roller, c4, 9 inch. 65 Cobra, 427, T6oo, 9inch, of course. First gen Hayabusa, airbox mod and running 2 exhaust cams.. Zoom Zoom Zoom

01-14-2007, 11:46 AM	#15
49studebaker Senior Member Join Date: Nov 2005 Location: Victor, Montana Posts: 386	Re: X-pipe experience I read an article on them some time back, it seemed that the colser to the header, the better. I remember thinking I didn't really have room to put it in the optimal position. I didn't want it under my transmission pan for obvious reasons. I believe they do help with exhaust scavaging and also that an x pipe will allow a smoother transitions from one side to the other, rather than 90 degree turns for an H pipe. __________________ 04 4x4 GMC Ext. Cab lifted 71 2wd GMC / Ramjet 350 ready for sheet metal 49 Studebaker pickup

01-14-2007, 12:32 PM	#16
kbs71 71 rustless in texas Join Date: Aug 2004 Location: Houston, TX Posts: 257	Re: X-pipe experience I had an entire exhaust put on my truck this past summer. the x pipe is located just aft of the tranny tail shaft. Rasphy sound NO WAY. It has a nice deep mellow tone. I'm running magnaflows with 2.5 stainless tubing coming out of stock rams horn manifolds. I noyiced a slight increse in gas milage (@ 2 to 3 mpg) and a large increase in performance. I'm extraemly glad i chose the x pipe over the H pipe. From what I've read the x pipe help scavange the exhaust better than an h pipe. The h pipe just more or less just equalizes the pressures between the two sides helping the sound better with the off phase cylinder firing. Whereas the x pipe actually uses an venturi type effect to help scavange (suck out) the exhaust gasses from the oppisite side. __________________ "The secret to creativity is knowing how to hide your sources." "No one really listens to anyone else, and if you try it for a while you'll see why" 71 C-10 LWB presently in a perpetual state of disassembly '96 Toyota (my work car) '04 Mustang Convertable (wife's car & other money pit) Latest aquesition and why my trucks still in the garage covered with junk.. 2010 Aqua Blue metallic 6 speed Manual LS3 2SS/RS Camaro (I want one of these in my truck FAQ here VENDORS here SUPPORT THE BOARD here My second favorite SITE

01-14-2007, 12:41 PM	#17
Boise69 The Hammer Man Join Date: Oct 2006 Location: Wilmington, NC Posts: 864	Re: X-pipe experience kbs71 - thanks for that info, it helps clear things up for me considering i'm facing the same job. Can you take some pictures of your set-up and can you give us more details including cost or materials, install? Magnaflow part numbers? I'm leaning in the same direction of yours with the exception of headers instead of Rams. thanks __________________ Boise69. Bought in Boise ID and its a '69 ___________________________________________ 1969 Chevy C-10 SWB 350/400 - drivable project www.americanhammer.com 2013 MBZ Sprinter customized 2005 MBZ Sprinter Van 2004 Land Rover Discovery 2001 Yamaha Road Star 1997 MBZ E420 1989 Ferrari Mondial T Last edited by Boise69; 01-14-2007 at 12:45 PM.



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01-14-2007, 01:32 PM	#18
kbs71 71 rustless in texas Join Date: Aug 2004 Location: Houston, TX Posts: 257	Re: X-pipe experience OK so I got a new camera this Christmas and you made me go out on my socks in the wet cocncreted to the garage and get these pictures for you after working all night long. __________________ "The secret to creativity is knowing how to hide your sources." "No one really listens to anyone else, and if you try it for a while you'll see why" 71 C-10 LWB presently in a perpetual state of disassembly '96 Toyota (my work car) '04 Mustang Convertable (wife's car & other money pit) Latest aquesition and why my trucks still in the garage covered with junk.. 2010 Aqua Blue metallic 6 speed Manual LS3 2SS/RS Camaro (I want one of these in my truck FAQ here VENDORS here SUPPORT THE BOARD here My second favorite SITE

01-14-2007, 01:58 PM	#19
gmc67swb Registered User Join Date: Feb 2003 Location: Mesquite, Tx Posts: 396	Re: X-pipe experience Maybe put it where you can still remove the tranny easily? Other wise you will be taking your exhaust apart to get the tranny out. __________________ GM 330HP/350, Magnuson 122HH, Tremec TKO 5spd

01-14-2007, 02:27 PM	#20
smoked68 Registered User Join Date: Oct 2006 Location: Rock Hill, SC Posts: 421	Re: X-pipe experience my experience with x/h pipes have been with mustang so i guess it may be diff with these trucks but I thought it would be the same... __________________ 1968 chevy shortbed, Dark Shadow Gray 4 bolt 383 Stroker,Weiand Super Charger, disc brakes, 9 inch, 391 gear, 20" Eagle wheels, muncie 4 speed/ Hurst shifter, 4/7 drop, Hedman midlengths, 3 inch exhaust w/ 2 chamber flows. 1966 Mustang with 306 roller, c-4, 9 inch Detroit locker rear. 1965 Fastback Mustang w/347 stroker, top loader 4spd, 9 inch detroit locker. 1966 Mustang coup, 306 roller, c4, 9 inch. 65 Cobra, 427, T6oo, 9inch, of course. First gen Hayabusa, airbox mod and running 2 exhaust cams.. Zoom Zoom Zoom

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