73-87chevytrucks.com
73-87 Chevy _ GMC Trucks => Performance => Exhaust => Topic started by: philo_beddoe on March 10, 2016, 05:11:36 pm
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I have full duals, should they be connected by that cross pipe or H pipe? If so, what are the benefits?
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Evens out the pulses down each set of pipes, helps scavenging and doesn't sound like two four cylinder engines running down the road
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The issue is that V-8s don't fire L-R-L-R-L-R-L-R, they fire L-R-R-L-R-L-L-R. Those two pulses one right after the other result in cylinders 4 and 7 opening the exhaust valve into a higher pressure in the exhaust than the other cylinders see. The X-pipe allows the extra pressure to go out the other side, where the H-pipe bleeds it off to the other side. Almost the same, but people will tell you that X-pipes are better at high rpm for horsepower and H-pipes are better at low rpm for torque.
On a C truck you can do either, while on a K truck the X-pipe can be difficult to fit in there where the H-pipe is no big deal. The H-pipe is probably better for a truck in any case. The H-pipe need not be full exhaust diameter. My exhaust is 2.25" and my H-pipe is 2". Either goes as far forward as you can get it.
http://users.rcn.com/weyand/smalls/imag0315small.jpg
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Ok, good info. My brother told me it would benefit, i told him i'll check "my sources". Thanks, time to get the welder out.
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Hopefully around Easter we're going to have this muffler in Brooke's truck. It has the X in the muffler.
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Any pics of an H pipe application?
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As for placement of the H pipe I heard somewhere that you should spray some rattle can paint down the side of the exhaust pipe, run the engine to temp and where it the paint stopped burning off is where to put the pipe.....???????/
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http://www.fordmuscleforums.com/attachments/all-ford-techboard/10575d1259099007-h-pipe-x-pipe-pc120046.jpg
http://users.rcn.com/weyand/smalls/imag0315small.jpg
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http://www.fordmuscleforums.com/attachments/all-ford-techboard/10575d1259099007-h-pipe-x-pipe-pc120046.jpg
http://users.rcn.com/weyand/smalls/imag0315small.jpg
So it goes AFTER the exhaust??
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http://www.fordmuscleforums.com/attachments/all-ford-techboard/10575d1259099007-h-pipe-x-pipe-pc120046.jpg
http://users.rcn.com/weyand/smalls/imag0315small.jpg
So it goes AFTER the exhaust??
I've always heard you put them as close to the engine as you can. After the headers/manifolds, before the mufflers.
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Correct, closer to engine is better, some guys can fit it before tranny oil pan and the bellhousing-but that does make it hard for some to do tranny fluid changes
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Ok, thats what i thought. Thanks
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Correct, closer to engine is better, some guys can fit it before tranny oil pan and the bellhousing-but that does make it hard for some to do tranny fluid changes
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Made mine removable just for that reason..... easy trans removal if needed
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Correct, closer to engine is better, some guys can fit it before tranny oil pan and the bellhousing-but that does make it hard for some to do tranny fluid changes
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Made mine removable just for that reason..... easy trans removal if needed
Do you have a picture on how you did it by chance?
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I'd like to see a pic too...
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An H pipe is ideal as it is not obtrusive for what it is. There's a pic of one on my 74 here before I welded it and had it coated to give you a visual. Think of it nothing more than a balancer for the exhaust. If you think you will see a difference with an X pipe over an H pipe then that's great but for your dd you won't. It's always good to believe in something I guess but having to drop your exhaust to access your trans pan will not afford your application any gains.
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Here's mine. I have not really cared for the sound of an X-pipe on most engines so I've stayed with the H...might make a couple extra HP at some point, but taking a nasty rumbling V8 & making it sound like a bumble bee isn't my thing. Lorne
(http://i163.photobucket.com/albums/t285/HAULINIT/PRPday002.jpg) (http://s163.photobucket.com/user/HAULINIT/media/PRPday002.jpg.html)
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Thats the exact set up i want, what i see in those pics.
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An H pipe is ideal as it is not obtrusive for what it is. There's a pic of one on my 74 here before I welded it and had it coated to give you a visual. Think of it nothing more than a balancer for the exhaust. If you think you will see a difference with an X pipe over an H pipe then that's great but for your dd you won't. It's always good to believe in something I guess but having to drop your exhaust to access your trans pan will not afford your application any gains.
Mine is like this except I made it in three pieces. Two short pieces welded to each exhaust pipe. then a center piece. I welded header flanges to the both exhaust pipe pieces and both ends of the center piece and bolted together with a header gasket in between each.
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http://www.mandrelbends.com/flanges-gaskets/exhaust-flanges/1-50-2-bolt-universal-exhaust-flange-1-4-mild-steel.html
4 of those, some bolts and gaskets you you have a crossover pipe that is removable. You could also use v-band flanges.
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Can you actually buy an H pipe or are they "made"?
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I think you can buy H pipe kits from Jegs and Summit.
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Nice looking installs in this thread. Been thinking about doing it on mine. How much is fair for a shop to charge for one? I was quoted 600 for two mufflers and a H pipe.
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Nice looking installs in this thread. Been thinking about doing it on mine. How much is fair for a shop to charge for one? I was quoted 600 for two mufflers and a H pipe.
I paid $514 for complete replacement, 2.25", from the header flanges out the back, including two Flowmaster 40s, all new hangers, and a 2" H-pipe, installed.
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I got a $75 quote for just the H pipe install. And from a good muffler shop, private. Not one of those rip off hacks.
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Went to have H pipe installed, the guy said i really would be wasting money on a simple daily driver. Plus there is really no place to put it, too far back does nothing. I did appreciate his honesty. He said when this system wears out he'll be glad to put in a custom system with an H pipe done correctly. Also that cross pipe should aim down or back and not directly straight across, for the full mixture effect.
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the guy said i really would be wasting money on a simple daily driver.
hmmm?
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Devils advocate here. I call BS on either one H or X.
Other than look cool from on your back I seriously doubt your going see any noticeable difference.
Throw on a K&N filter with it and Wow!
New exhaust system sure why not add it.
Good flowing exhaust is just fine.
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Exactly blazer. In my application, no noticeable diff. This place has been doing exhaust systems since the 70's, i took my 70 chevelle there back in 85, did a super job. He could have easily made a quick $75, but told it like it is. New system, sure, add it in.
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You may not see a noticeable difference. You may not feel a noticeable difference. But you will hear a noticeable difference........ ;)
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I wish i could get it quieter! Dont want the hot rod sound.
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You may not see a noticeable difference. You may not feel a noticeable difference. But you will hear a noticeable difference........ ;)
In what way?
My muffler is going and I need to work on it. Everybody I talk to says go with a dual system for improvement.
I like how my current setup sounds: The exaust system and the engine all sound like one unit, it's quiet IMO (can't really hear the tailpipe at all until about 2-3ft away). But can I make it more quiet? I wouldn't mind, I want a silent system. People I talk to recommend just going with stock.
I don't know exactly what I have right now. Pics below.
I was told an install job for a dual system would be around $500. I'd like to do everything I can myself if that is possible, but I don't know if that is doable.. I don't know where to start as far as quality parts and pieces go. And I don't have a pipe bender.
BTW, on a side note: Any way to alter the sound of your vehicle via togglable valve? Who's done that?
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I don't know exactly what I have right now. Pics below.
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Looks like someone put a resonator for the muffler but your catalytic convertor is the GM stock version. I have run a 3" straight pipe after the stock catalytic converter exiting in the stock position and I really liked the sound
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Stock single exhaust is what you want to stay with then.
I like how my current setup sounds: The exaust system and the engine all sound like one unit, it's quiet IMO (can't really hear the tailpipe at all until about 2-3ft away). But can I make it more quiet? I wouldn't mind, I want a silent system. People I talk to recommend just going with stock.
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You may not see a noticeable difference. You may not feel a noticeable difference. But you will hear a noticeable difference........ ;)
In what way?
My muffler is going and I need to work on it. Everybody I talk to says go with a dual system for improvement.
I like how my current setup sounds: The exaust system and the engine all sound like one unit, it's quiet IMO (can't really hear the tailpipe at all until about 2-3ft away). But can I make it more quiet? I wouldn't mind, I want a silent system. People I talk to recommend just going with stock.
I don't know exactly what I have right now. Pics below.
I was told an install job for a dual system would be around $500. I'd like to do everything I can myself if that is possible, but I don't know if that is doable.. I don't know where to start as far as quality parts and pieces go. And I don't have a pipe bender.
BTW, on a side note: Any way to alter the sound of your vehicle via togglable valve? Who's done that?
It does look like an OEM cat, and an aftermarket resonator.
If that's all there is, it is possible to go quieter.
Installing a new resonator, along with adding an OEM style muffler would make it a decent amount quieter.
Exhaust cut outs are illegal in most areas. A lot of people still do it, but keep in mind that it can cause failed inspections, tickets, etc.
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Stock single exhaust is what you want to stay with then.
I like how my current setup sounds: The exaust system and the engine all sound like one unit, it's quiet IMO (can't really hear the tailpipe at all until about 2-3ft away). But can I make it more quiet? I wouldn't mind, I want a silent system. People I talk to recommend just going with stock.
In your opinion was mine stock single? Wish mine was quieter. But it is what it is. Not touching it until this system rots out.
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Yes, someone put a Midas exhaust system on there. Probably golden Turbo mufflers
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I'm suprised to know I have only a resonator. I din't know they could make a vehicle so quiet all by themselves.
Will adding a muffler, or going muffler only, change the sound style of my truck? I really wish it were possible to upload MP3s to forum, that could be thread itself: Truck sound configurations. People could list their setup along with one or more files standing at certain positions by their vehicle.
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Since this is a dual exhaust type thread....
Question, what is the advantage or actual reason for dual exhaust? Is it needed on a pure stock configuration, where your just putting around town? I hate the noise and am considering going back to single.
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Your mufflers are the problem, not having dual pipes. Get better mufflers if you want it quieter
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Can you recommend a nice quiet type or brand?
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Why don't you wait until you are ready to redo the exhaust system?
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Anxiety and no patience. You should know me by now...lol
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Ok, went to a factory single exhaust system. Installed a nice whisper quiet muffler. Super quiet, cant even hear it running! Love it!
Well, all i can hear is the quiet humm pf the crisp new crate 350.