x pipe ideas.... - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Sport/Truck · 02-01-2009, 02:01 PM

I saved this picture from someone on here, it look really clean to me but not sure if it would be too restrictive.
Now that I have my 2.5 in x-pipe and have looked at my situation this setup is more appealing.
It allows the pipes to use the factory recessed areas to tuck up the pipes so they wont be as visible.
I'm thinking 1.5 in pipes on a 383 aren't restrictive by any means so a few more bends won't be noticeable?
My x isn't quite like that in the picture, so I'll try to substitute 45's in place of the 90's.

What do you think?
s/t

ChevLoRay · 02-01-2009, 02:13 PM

My opinion is that the X should be more "in-line" than this photo shows, but this may be better for exhaust flow than a simple H pipe....or not. I agree it's neat and fits well, but what fits isn't always what works best.

Chevymann1968 · 02-01-2009, 02:23 PM

Quote:

Originally Posted by ChevLoRay

My opinion is that the X should be more "in-line" than this photo shows, but this may be better for exhaust flow than a simple H pipe....or not. I agree it's neat and fits well, but what fits isn't always what works best.

I agree!!!! Exhaust should have as little restriction as possible!!!! My self personally the only 90 shold be at the header or the manifold!! If i remeber right 5 90s become a complete block!!!

**Smitty** · 02-01-2009, 04:10 PM

Mine was done by a local shop that does a lot of street rods etc. and was done pretty much as this one was. Although I don't think the area where they are siamesed are quite as restrictive. A little less severe of an arch. With the drop I can't get under the truck far enough right now to get pics. But before the pipe goes into the muffler I had flanges put on. This way if I ever need to drop the trans all I have to do is take them loose from the manifold and at the rear flange. Allowing me to drop it down without a lot of hassle.

67_C-30 · 02-01-2009, 04:23 PM

Yeah, I agree. The path to and from the "X" should be a smoother transistion. The "X' in that set-up was actually intended to be turned 90 degree from the way it now.

.

Ryan Hubbard · 02-01-2009, 08:50 PM

I worked for Dr. Gas and did a lot of research in exhaust systems and he was the one that started the x-crossover and still is used exclusively in Nascar. That system pictured does not work well. I would use a system close to what is listed in Jegs or Summit catalogs. The size of the hole in the crossover is critical to its performance. Too small and it does not work and too big doesn't work either. Here is a picture of my Dr Gas 3" System. I was able to install it in the factory locations just fine.

LuckyHenriksen · 02-01-2009, 10:08 PM

Ya those look like awesome mufflers. I agree on the X in the first picture to be restrictive, those are some sharp bends. It might even change the exhaust note?

Sport/Truck · 02-01-2009, 10:14 PM

Thanks, they are definitely beefy!
s/t

Here's a picture of the inside.

Longhorn Man · 02-01-2009, 11:14 PM

the X in the first post looks highly restrictive. Probably more so than just running straight pipes/mufflers.

02-01-2009, 02:01 PM	#1
Sport/Truck Sierra Grande Club Join Date: Jan 2007 Location: New Mexico USA Posts: 2,433	x pipe ideas.... I saved this picture from someone on here, it look really clean to me but not sure if it would be too restrictive. Now that I have my 2.5 in x-pipe and have looked at my situation this setup is more appealing. It allows the pipes to use the factory recessed areas to tuck up the pipes so they wont be as visible. I'm thinking 1.5 in pipes on a 383 aren't restrictive by any means so a few more bends won't be noticeable? My x isn't quite like that in the picture, so I'll try to substitute 45's in place of the 90's. What do you think? s/t Attached Images __________________ 1971 GMC Sierra Grande, 1/2 ton short wide, original 4 bolt 010 020 block & heads. (matching #'s). 383 stroker, SMI q jet 750 cfm, Lunati Voodoo 60102 cam, Scorpion roller rockers, Spin Tech pro street mufflers with X pipe.

02-01-2009, 02:13 PM	#2
ChevLoRay Old Skool Club Join Date: Jun 2001 Location: Benton, AR "The Heart of Arkansas" Posts: 10,880	Re: x pipe ideas.... My opinion is that the X should be more "in-line" than this photo shows, but this may be better for exhaust flow than a simple H pipe....or not. I agree it's neat and fits well, but what fits isn't always what works best. __________________ Member Nr. 2770 '96 GMC Sportside; 4.3/SLT - Daily driven....constantly needs washed. '69 C-10 SWB; 350/TH400 - in limbo The older I get, the better I was.

02-01-2009, 04:10 PM	#4
Smitty Senior Member Join Date: Dec 1999 Location: Spring Valley, Ca. Posts: 1,136	Re: x pipe ideas.... Mine was done by a local shop that does a lot of street rods etc. and was done pretty much as this one was. Although I don't think the area where they are siamesed are quite as restrictive. A little less severe of an arch. With the drop I can't get under the truck far enough right now to get pics. But before the pipe goes into the muffler I had flanges put on. This way if I ever need to drop the trans all I have to do is take them loose from the manifold and at the rear flange. Allowing me to drop it down without a lot of hassle. __________________ Smitty '71 Short Fleetside Spring Valley, Ca. Last edited by Smitty; 02-01-2009 at 04:11 PM. Reason: mispelled words

02-01-2009, 04:23 PM	#5
67_C-30 I have a radical idea! Join Date: Jan 2005 Location: Sweet Home Alabama! Posts: 6,513	Re: x pipe ideas.... Yeah, I agree. The path to and from the "X" should be a smoother transistion. The "X' in that set-up was actually intended to be turned 90 degree from the way it now. . __________________ '67 C-30 Dually Pickup 6.2 Turbo Diesel, NP435 ‘72 C-10 SWB , 350 4bbl, TH350 '69 C-10 SWB , 250 L6, 3 OTT '69 GMC C3500, dump truck, 351 V6, NP435 '84 M1009 CUCV Military Blazer 67 C-30 Turbodiesel build thread http://67-72chevytrucks.com/vboard/s...d.php?t=254096 My trucks http://s226.photobucket.com/albums/d...ediafilter=all Member of the 1-Ton Club! Last edited by 67_C-30; 02-01-2009 at 04:23 PM.

02-01-2009, 08:50 PM	#6
Ryan Hubbard Registered User Join Date: Aug 2007 Location: Mission Viejo, CA Posts: 288	Re: x pipe ideas.... I worked for Dr. Gas and did a lot of research in exhaust systems and he was the one that started the x-crossover and still is used exclusively in Nascar. That system pictured does not work well. I would use a system close to what is listed in Jegs or Summit catalogs. The size of the hole in the crossover is critical to its performance. Too small and it does not work and too big doesn't work either. Here is a picture of my Dr Gas 3" System. I was able to install it in the factory locations just fine. Attached Images Last edited by Ryan Hubbard; 02-01-2009 at 09:07 PM.

02-01-2009, 10:08 PM	#7
LuckyHenriksen Registered User Join Date: Oct 2007 Location: Sherwood Oregon Posts: 1,908	Re: x pipe ideas.... Ya those look like awesome mufflers. I agree on the X in the first picture to be restrictive, those are some sharp bends. It might even change the exhaust note? __________________ 1968 Yenko Chevy LWB 6.0L/TH400 3/4 Drop Senior Project Build Thread Here

02-01-2009, 10:14 PM	#8
Sport/Truck Sierra Grande Club Join Date: Jan 2007 Location: New Mexico USA Posts: 2,433	Re: x pipe ideas.... Thanks, they are definitely beefy! s/t Here's a picture of the inside. __________________ 1971 GMC Sierra Grande, 1/2 ton short wide, original 4 bolt 010 020 block & heads. (matching #'s). 383 stroker, SMI q jet 750 cfm, Lunati Voodoo 60102 cam, Scorpion roller rockers, Spin Tech pro street mufflers with X pipe.

02-01-2009, 11:14 PM	#9
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,690	Re: x pipe ideas.... the X in the first post looks highly restrictive. Probably more so than just running straight pipes/mufflers.



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