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#1 |
Registered User
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Location: Dansville, NY
Posts: 248
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Dual Exhaust on 6's
Hello,
Did not want to hijack 72GMC2500's thread, Anyone run the cast iron headers and dual exhaust on a 292? What mufflers? What is the tone?
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DIY body and paint work is cheap, making it look good... priceless -------------------------------------------- My Toys; ’26 Ford Model T ‘72 Triumph Spitfire 1500 '09 "The Briggs Flyer" Gettin' High. |
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#2 |
Special Order
![]() ![]() Join Date: Nov 2004
Location: Mt Airy, MD
Posts: 85,858
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Re: Dual Exhaust on 6's
I haven`t,but I`d like to.I think duals on a six sounds smooth.Especially a 292 would be nice.
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"BUILDING A BETTER WAY TO SERVE THE USA"......67/72......"The New Breed" GMC '67 C1500 Wideside Super Custom SWB: 327/M22/3.42 posi.........."The '67" (project) GMC '72 K2500 Wideside Sierra Custom Camper: 350/TH350/4.10 Power-Lok..."The '72" (rolling) Tim "Don't call me a redneck. I'm a rough cut country gentleman" R.I.P. ~ East Side Low Life ~ El Jay ~ 72BLUZ ~ Fasteddie69 ~ Ron586 ~ 67ChevyRedneck ~ Grumpy Old Man ~ |
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#3 |
I am a Referee of life.
Join Date: Jun 2000
Location: Greensboro N.C.
Posts: 13,993
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Re: Dual Exhaust on 6's
If you go over to www.inlinersinternational.com there used to be some sound clips of different 6 exhaust combo's.There's nothing like the sound of a sixxer rapping off the pipes.Most of the time a larger displacement gives a throatier sound to the exhaust so the 292 should sound great.Muffler type/brand just depends on how loud you want it.
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The 47-present Chevrolet and GMC Truck Message Board Network,it's owners,moderators,members,and associates of any type should not be held responsible for my opinion. You can't fix stupid,not even with duct tape. "My appearance is due to the fact that "GOD" does punish you for having too much fun!" Barrett-Jackson has perfected alchemy,they make rust into gold! "You can lead a horse to water but you can't saddle a duck" "Cleverly disguised as a 'Responsible Adult' "Sometimes your Knight in shining armor is just a retard in tinfoil" |
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#4 |
Old Skool Club
![]() Join Date: Jun 2001
Location: Benton, AR "The Heart of Arkansas"
Posts: 10,880
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Re: Dual Exhaust on 6's
Went to school with a guy who had duals on his '55 Chevy 235/stick. Ran a glasspack on one pipe and the other was straight-through.
Just wind it up and let off on the gas.....sweeeeeet!!!
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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. |
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#5 |
I'm already on the flipside.
Join Date: Feb 2007
Location: Colorado Springs CO.
Posts: 53
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Re: Dual Exhaust on 6's
I had a jeep with the 258ci. I put on a header and split the exhaust right after the collector and put some generic turbo mufflers on it. It sounded AWESOME! I love the sound of a 6 with dual exhaust.
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#6 |
Registered User
Join Date: Nov 2006
Location: Springfield/Kansas City
Posts: 1,842
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Re: Dual Exhaust on 6's
I can't wait to get my motor done. I've got a 250 so be sure to post your results for the rest of us!
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#7 | |
FarmBoy.
Join Date: Feb 2005
Location: Rhinelander, WI
Posts: 1,103
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Re: Dual Exhaust on 6's
I LOVE the sound of a 6 through headers.
It sounds amazing at idle, pretty mean. kinda like something that'll come eat your kids. just be careful you don't bring it up too high in rev's (which isn't an issue since they don't like the high R's anyway), it starts to sound a bit like a chain saw. with that being said, i always wanted to put glasspacks on my 292 with headers, and run them out the side, which is pretty much what i did with my 307. but...pretty sure the ol' sixer sounded alot better. ![]() -Sam.
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1969 GMC C1500. long fleet. 307. 3 on the tree. 3.07 gears. Oliver green. Bent and bruised. Daily Driver. Quote:
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#8 |
Registered User
Join Date: Jun 2003
Location: Mtn. Home, Idaho
Posts: 906
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Re: Dual Exhaust on 6's
I put stovebolt cast headers on a 292 with Clifford intake ran 2,2 1/2" into a flow with 1,3" out right in front of the rear tire and it was AWSUM! Cruising wasnt bad had cab well insulated but when ya hit it just scared the pants off of bystanders
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#9 |
Registered User
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Location: Dansville, NY
Posts: 248
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Re: Dual Exhaust on 6's
Suville,
You got just about what I want, I was thinking of running the pipes down the side of the cab and body like sidepipes, dumping in front of each wheel. I will put a chrome cover or screen over the pipes. Never see side pipes on a truck anymore. What Clifford Intake did you use? I sorta have my heart set on a triple Offy # 1454 progressive hookup.
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DIY body and paint work is cheap, making it look good... priceless -------------------------------------------- My Toys; ’26 Ford Model T ‘72 Triumph Spitfire 1500 '09 "The Briggs Flyer" Gettin' High. |
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#10 |
Registered User
Join Date: Jun 2003
Location: Mtn. Home, Idaho
Posts: 906
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Re: Dual Exhaust on 6's
I hear the Offy is better for lower end rpm and city type driving,and the Clifford is more effective at higher RPM's. Used the "special order" water heated manifold and I believe a Holly 390? dont remember. Did it for a customer, he was real happy!
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#11 |
Registered User
Join Date: Apr 2003
Location: Central PA....In the Berg of Nisbet
Posts: 790
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Re: Dual Exhaust on 6's
I got Clifford truck headers on mine(250) along with their intake..........I put both into one piece of 3" with a glass pack. Alot of people like the sound of it, but I personally find it just OK................We had the C-10 in my avatar setup with the stock intake/exhaust breathing out a piece of straight 2" all the way back the the front of the box, where it turned into 2.5" and was dumped out above the cab in the form of a stack(Piece of shallow well casing).........No muffler of any type. It was the neatest sounding truck I ever was around......It was a really low tone and was LOUD. Sitting in the box going up the road was the best, it almost sounded like it had a turbo spooling up under the hood when you took off and between shifts........I've been trying to copy the sound with my K-20, but can seem to do it, and I don't want a stack on it.
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'72 K-20 EFI'ed 250 Inline/4spd stake body, Farm Truck '71 C-20 Cummins Diesel Powered, In storage thanks to $5.00 diesel! '69 3500 GMC 305V-6/4spd, Still under reconstruction.......... Inlines Rule! 6 soldiers standing is better than 8 laying down!!!!!!!! |
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#12 |
Registered User
![]() Join Date: Jun 2007
Location: Dansville, NY
Posts: 248
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Re: Dual Exhaust on 6's
I like the old school look of the Offy intake, I was able to find more info on the web on the Offy products as well. The Clifford website did not have answers to all my questions.
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DIY body and paint work is cheap, making it look good... priceless -------------------------------------------- My Toys; ’26 Ford Model T ‘72 Triumph Spitfire 1500 '09 "The Briggs Flyer" Gettin' High. |
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#13 |
Registered User
Join Date: Apr 2003
Location: Central PA....In the Berg of Nisbet
Posts: 790
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Re: Dual Exhaust on 6's
I was told when I was looking for a intake to stay away from Cliffords...........Go with an Offy, I liked the beefy look of the clifford myself, so going against what I was told I went and bought a water heated clifford. Got a set of their truck headers used, and got a good used 1404 500 CFM edelbrock and dropped on it. I had some tuning issues at first, but I eventually figured it out and got it to the point it runs awesome. I get great power and good fuel mileage. I am glad I didn't go with an Offy now. I just bought a EFI kit for it from Howell that will bolt on my Clifford intake.........Can't wait to get it on to she what type of difference it will make. I have no problems with the carb, I just don't like having to play with a choke in the winter when its cold, and electric chokes don't impress me.
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'72 K-20 EFI'ed 250 Inline/4spd stake body, Farm Truck '71 C-20 Cummins Diesel Powered, In storage thanks to $5.00 diesel! '69 3500 GMC 305V-6/4spd, Still under reconstruction.......... Inlines Rule! 6 soldiers standing is better than 8 laying down!!!!!!!! |
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#14 |
Old Skool Club
![]() Join Date: Jun 2001
Location: Benton, AR "The Heart of Arkansas"
Posts: 10,880
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Re: Dual Exhaust on 6's
I know they're scarce as hen's teeth, and they won't fit (I think is the case) but the 230CID Pontiac OHC I had in my '67 Firebird Sprint had split mainfolds from the factory, along with a high-lift cam and a Q-Jet. It came from the factory with a Y-pipe from the manifolds (more like shorty headers) that fed into a single V-8 exhaust pipe, muffler and tailpipe. I had mine done with dual exhaust pipes feeding into baby turbo mufflers and then tailpipes that dumped at the back of the body like a Camaro with a V-8.
Alas, I miss the car and mourn the day I sold it....all because we have five kids who were starting to fight about who would get it when they started driving. Oh, none of them would get to drive it....they just didn't know.
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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. |
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#15 |
Senior Member
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Location: Tucson, AZ USA
Posts: 7,285
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Re: Dual Exhaust on 6's
I have a 292 in my '68 Stepside C/10. It's the original engine rebuilt 27 years later at .030-over. I have an Offy intake, Edelbrock 500 CFM, Clifford headers, dual pipes [1"-7/8, I think] thru turbo mufflers, exiting aft of rear tires. I have a crossover tube, on an angle, under the cab.
On the freeway at about 3000 rpm [with a Crane 260H cam] I hear a kinda "wildcat" snarl echoing off the retaining walls. Never taped it, I have my hands full under those conditions. BTW, Inliners' International is: www.inliners.org
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Every 25 years I like to rebuild that 292, whether it needs it or not. |
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#16 | |
Registered User
Join Date: Feb 2007
Location: Marana, Arizona
Posts: 3,416
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Re: Dual Exhaust on 6's
Quote:
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#17 |
Registered User
Join Date: Jan 2008
Location: Pleasant Plains, Arkansas
Posts: 51
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Re: Dual Exhaust on 6's
I had headers and duals with 14inch Turbo mufflers on a 250 in a 71 c10 in highschool. At idle it sounded pretty mean, fairly deep and throaty. At about 2000 to 2500 rpm the pitch immediately changed to what has been compared to a chainsaw on steroids or an airplane on takeoff. With the gearing it ran in the 2500 to 3000 rpm range on the highway. I needed a loud stereo to cover it up in the cab, but the hum of that engine was sure an attention getter.
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#18 |
Registered User
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Location: Dansville, NY
Posts: 248
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Re: Dual Exhaust on 6's
'68OrangeSunshine,
Do you have a larger photo of your avitar? Or others? I'd like to see 'em..
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DIY body and paint work is cheap, making it look good... priceless -------------------------------------------- My Toys; ’26 Ford Model T ‘72 Triumph Spitfire 1500 '09 "The Briggs Flyer" Gettin' High. |
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#19 |
Senior Member
![]() Join Date: Feb 2002
Location: Tucson, AZ USA
Posts: 7,285
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Re: Dual Exhaust on 6's
I apologize for my lack of computer savvy. I do have some jpegs of my 2002 thru 2005 292 engine build adventure, but posting them is too complicated for me. I'll ask one of my techie friends to help me out with this, but it'll have to wait -- I'm up to my elbows in replacing the starter on my '71 Jimmy. Involves pulling hedders on the 350 to get to the starter and solenoid. Intend to wrap hedders so the starter and solenoid won't cook off again. Maybe splice in external Fomoco-type solenoid on fender skirt. The project is snowballing rapidly.
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Every 25 years I like to rebuild that 292, whether it needs it or not. |
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#20 |
Aluminum slot wheels rule...
Join Date: Jan 2006
Location: Maine
Posts: 6,212
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Re: Dual Exhaust on 6's
Jeez, you shouldnt need to pull the header to get the starter off 68OrangeSunshine. I didn't need to anyway...
Last edited by JAKES 68GMC; 01-16-2008 at 03:06 AM. |
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#21 | |
Senior Member
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Location: Tucson, AZ USA
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Re: Dual Exhaust on 6's
Quote:
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Every 25 years I like to rebuild that 292, whether it needs it or not. |
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#22 |
Registered User
Join Date: Sep 2005
Location: Smith Mountain Lake Virginia
Posts: 1,537
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Re: Dual Exhaust on 6's
Three questions for those in the know,
1) What diameter and thickness should a set of pipes be for the headers (considering building a set for s&g's) 2) thoughts on a set where all 6 primaries go into one say... 3" out? 3) This might be a shot in the dark - I have a '77 Datsun 280z, w/I6 and headers on it (future project), anyone think they'd be the right fit for my 250????
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"A cat will almost always blink when hit between the eyes with a ball peen hammer" (you don't always have to state the obvious) Wear your PPE! You can eat with false teeth but you can't see with a false eye. 1959 Studebaker Silverhawk 350/400 1972 C10 L6 3OTT 2005 F350 - Built - whew! |
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#23 |
Registered User
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Location: KINGSPORT,TN.
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Re: Dual Exhaust on 6's
I,VE GOT a n.o.s. set of split headers if you need a set.
bob
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#24 |
Sophomore Member
![]() Join Date: Jul 2006
Location: brownwood, tx
Posts: 927
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Re: Dual Exhaust on 6's
i have a 1950 pickup with a 235. i have fenton headers and cherry bombs. sounds good. when it winds up it sounds like a pissed off mosquito.
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1972 Chevrolet Highlander SWB 1972 Custom Deluxe 3/4 2WD 60k miles these trucks don't need vacuum gauges cause they don't suck! two wrongs don't make a right, but three rights do make a left all i want is a little more than i'll ever get it's better to be judged by 12 than to be carried by 6 |
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#25 |
Registered User
Join Date: Mar 2005
Location: 10-Uh-See
Posts: 5,609
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Re: Dual Exhaust on 6's
My old 250 with Hedman headers and turbos had a good sound to it. I don't have any sound clips.
I have this video of my dad's 53 with a 235, Clifford headers and stock intake, Monojet carb and Flowmaster mufflers. VIDEO
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Last edited by 68Stepbed; 01-17-2008 at 11:41 PM. |
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