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Topic: Ballanced dual exhaust

in Forum: C3 Fuel, Emission Control, and Exhaust Systems


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Ballanced dual exhaust (5/15)
 6/24/09 6:12pm
indy99
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Newport, MI - USA

Vette(s):
1980 L-48 still in the middle of a frame-off.


Joined: 6/9/2005
Posts: 932

I also went with a true dual stainless steel pipe set-up from MAM. I decided to go with the KBD twin tip mufflers.  So far I am pleased with the results.   Here is a short video I made.  The audio is not the greatest but it sounds much better in person. It has a deep throaty growl at idle, smooths out at higher rpms and roars when you get on it.
 
indy992009-06-24 15:18:12

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Corvettes and women are the same...You want to make love to them but they keep breaking down.
Ballanced dual exhaust (6/15)
 6/24/09 7:59pm
VetteSpecialties
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Mounds View, MN - USA

Vette(s):
70 LT1 coupe, 69 350 HP coupe, 69 390HP 427 coupe, 71 LS5 convert, 85 coupe, 93 coupe


Joined: 5/24/2007
Posts: 1031

The '74 system is a bolt in if you have a four speed, and you only need to change the center hanger if you have an automatic.  Or you can modify your existing center hanger by welding an additional hanger on the other side.  We sell the Allens system.  We sell at least ten times as many aluminized systems as stainless.  They are quieter, easier to work with, and considerably cheaper.  We get $379.00 for a complete system including donuts and clamps.  I agree with the comments about there not being a measurable benefit to adding the connecting "H" pipe unless you are making a lot of horsepower.

Larry
Ballanced dual exhaust (7/15)
 6/25/09 2:14am
Aussie79vette
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, - Australia

Vette(s):
1979 corvette


Joined: 5/15/2009
Posts: 28

Thanks for the feed back, I agree it may not be worth the effort to get the H-PIPE, just a whole lot easier to get a true dual.
 
Still waiting to get my tyres from the US and make sure there are no hidden costs that will blow the budget, if all ok then will look a bit deaper.
 
 
Andy from down under


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Ballanced dual exhaust (8/15)
 6/25/09 12:05pm
fp_vetter72Lifetime Member
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COPPERAS COVE, TX - USA

Vette(s):
1972 corvette stingray convertible 2007 coupe


Joined: 7/6/2002
Posts: 417

I have true duals with magnaflow mufflers, had a local shop cut in a cross over just behind tranny. Just like Brian it only cost a few bucks to have it done.

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Ballanced dual exhaust (9/15)
 6/27/09 11:05pm
aceintheholeLifetime Member
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Manteca, CA - USA

Vette(s):
1978,two tone,Metalic Rootbeer & gold 1975 L48 4 speed


Joined: 11/20/2005
Posts: 3623

Hi Andy, I'm a "Magnaflow" (for mufflers) fan, but I wouldn't worry about the crossover pipes myself, just not enough gain to be worthwhile. Good luck.

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Jimmy B.
Just can't wait to get on the road again.

 
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Ballanced dual exhaust (10/15)
 6/28/09 12:02am
anips
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sonoma, CA - USA

Vette(s):
72 LT-1 AC coupe,69 l-36 coupe


Joined: 8/9/2002
Posts: 784

hey Kdaddy, clicked on the link you left and its some floral design outfit in Honolulu, Hawaii, awa,awa, awa??
Ballanced dual exhaust (11/15)
 6/28/09 10:44am
KDADDY79
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Dutchess County, NY - USA

Vette(s):
White '79 Corvette. It's a driver.


Joined: 8/27/2007
Posts: 2484

Sorry 'bout that Andy.
Here it is;
You might also want to check with Corvette Specialties (right here at C3VR) for a system that comes complete with the mufflers. If I had to do it again, I'd go that route.
Kevin
 
Ballanced dual exhaust (12/15)
 6/28/09 3:23pm
bio11
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Oklahoma City, OK - USA

Vette(s):
1972 LS5 Convertible,Auto.Targa Blue with Black Interior.


Joined: 4/1/2007
Posts: 432

After reading this I'm thinking about having my local muffler guy cut in a crossover to maybe smooth out the sound and eliminate some of the popping. My Big Block with Headers, I get a little popping sometimes. Do you guy's think this would make it sound a little smoother.
Ballanced dual exhaust (13/15)
 6/28/09 3:51pm
anips
Former Member

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sonoma, CA - USA

Vette(s):
72 LT-1 AC coupe,69 l-36 coupe


Joined: 8/9/2002
Posts: 784

Here where I live in the Socialist Republic of Kalifornia USA, my friend owns a muffler shop, for a 21/2" alumn. system with Flow's or any upper end mufflers you desire and SS tips is just about the same price $AU1200-$US950.. now if you live out in the mid west prices are a little cheaper, whats $100 one way or another, what you might want to think about is if you buy a system from the US, you might save a couple $, don't forget shipping, but what if the system you bought from the US is not made correctley, or maybe the dock worker drove a fork lift over it, and it does happen, are you going to send it back or wait to collect the ins. money, if that were to be the case that $AU1200 local muffler shop price wouldn't look so bad.Ermm.....BTW, Larry's is a killer deal no doubt about it, most muffler shops can not compete specially here in Calif, my friend told me his cost for parts alone was more than the complete after market sys, the after market sys that I bought and installed on the LT-1 was made dead nuts, , the only part he made for me was a double flanged 3" to 21/2" collector reducer, so I could drop the collector reducer to have room to pull the short primary out of the secondary pipe, I have under car Hookers and if you weld the primary pipe directly to the reducer like most shops do you have to pull the headers or cut the weld at the reducer- primary pipe to be able to pull the exh system to be able to pull a 4-speed. 

anips2009-06-28 23:04:13
Ballanced dual exhaust (14/15)
 6/28/09 4:24pm
anips
Former Member

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sonoma, CA - USA

Vette(s):
72 LT-1 AC coupe,69 l-36 coupe


Joined: 8/9/2002
Posts: 784

Bio, if you get popping through the exh the cause's could be a over rich condition in the carb, if you run a smog pump it could be a bad "gulper" valve, or loose header bolts or a bad header or collector gasket, if air is drawn into the sys. between the head and header flange you may get a pop through the exh or at the flange, as far as the bal. tube, I can't see cutting one in just aft of the trans crossmember would cause a problem, besides where else would you put one, just make sure your sys is hanging correctley before cuttin in the tube........I meant the muffler sys!  anips2009-06-28 19:10:48
Ballanced dual exhaust (15/15)
 6/28/09 4:54pm
fp_vetter72Lifetime Member
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COPPERAS COVE, TX - USA

Vette(s):
1972 corvette stingray convertible 2007 coupe


Joined: 7/6/2002
Posts: 417

It will stop the popping, sound much smoother. Had the same thing going on and it smothed it right out with a nice mellow tone untill I hammer itBig smile

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