Duel Exhaust......Help
Melting Slicks
Joined: Aug 2005
Posts: 2,821
Likes: 204
From: Lincoln CA
Drifting
Joined: Sep 2006
Posts: 1,986
Likes: 21
From: Columbus MN
Burning Brakes
Joined: Sep 2005
Posts: 895
Likes: 4
From: whitman massachusetts
crossmember
Hi Burnt,
I just started modifying my crossmember this week. Have it disected and welded back together. All that is left is to make up the bottom brackets. Work is interfereing with my freetime, damnit! I am running 2.50" pipe with a crossover, and will be able to unbolt the entire system from headers back, in one peice. It seems like a worthwhile modification, and if you have basic wrench skills, is a pretty simple modification. I have documented the procedure with photos, but don't have ability to put them on forum. If you e-mail me, I can send some to you, as an attachment.
Willem
I just started modifying my crossmember this week. Have it disected and welded back together. All that is left is to make up the bottom brackets. Work is interfereing with my freetime, damnit! I am running 2.50" pipe with a crossover, and will be able to unbolt the entire system from headers back, in one peice. It seems like a worthwhile modification, and if you have basic wrench skills, is a pretty simple modification. I have documented the procedure with photos, but don't have ability to put them on forum. If you e-mail me, I can send some to you, as an attachment.
Willem
Safety Car
Joined: Aug 2001
Posts: 4,883
Likes: 11
From: North Easton Mass
Hi Burnt,
I just started modifying my crossmember this week. Have it disected and welded back together. All that is left is to make up the bottom brackets. Work is interfereing with my freetime, damnit! I am running 2.50" pipe with a crossover, and will be able to unbolt the entire system from headers back, in one peice. It seems like a worthwhile modification, and if you have basic wrench skills, is a pretty simple modification. I have documented the procedure with photos, but don't have ability to put them on forum. If you e-mail me, I can send some to you, as an attachment.
Willem
I just started modifying my crossmember this week. Have it disected and welded back together. All that is left is to make up the bottom brackets. Work is interfereing with my freetime, damnit! I am running 2.50" pipe with a crossover, and will be able to unbolt the entire system from headers back, in one peice. It seems like a worthwhile modification, and if you have basic wrench skills, is a pretty simple modification. I have documented the procedure with photos, but don't have ability to put them on forum. If you e-mail me, I can send some to you, as an attachment.
Willem
Rick B.
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Le Mans Master
Joined: Mar 2004
Posts: 7,502
Likes: 1,510
From: Little Rock AR
I have the original manifiolds. It went on fairly easy. Not perfect but I can live with it. I added a crossover where the pipes come close together. -Mark.
Le Mans Master
Joined: Jun 2007
Posts: 7,801
Likes: 0
From: Crush your enemies, see them driven before you, and hear the lamentations of the women TX
I've got duals with no crossover. A set of cats (whose days are very numbered) and monza tips. What are the advantages of a crossover and are there any real advantages with x-pipe etc. crossovers?
Le Mans Master
Joined: Mar 2004
Posts: 7,502
Likes: 1,510
From: Little Rock AR
The X-pipe probably works the best but I have not tried one. I do know that some professionals use them so they do work better.
-Mark.
Drifting
Joined: May 2007
Posts: 1,491
Likes: 2
From: North Royaton Ohio
I put duals on my 81 and I didn't have to change the crossmember. I got MidAmerica's system. It took a while to get it fitted up right and get it all aligned, but it's tucked right up against the crossmember and no problems there. It's 2 1/2", and I've compared the ground clearance to my dad's 69 with factory exhaust, and the difference is negligible. I've only scraped it on the ground once, but that was my fault. You'll hit the spoiler up front before the exhaust.
Drifting
Joined: Sep 2006
Posts: 1,986
Likes: 21
From: Columbus MN
Whether you use OTS like the ones from Mid America or modify the cross member and go near-straight back on the left depends on the headers. If you keep the original ram horn exhaust manifolds, then the OTS pipes are the easiest to put on.
I have full-length headers on my '80. In order to get the left pipe to the right side of the car like original, the left pipe would have needed a 90 deg. bend just behind the collector. Sharp bends are bad for flow.
IMO, if you're converting to true dual exhaust, you should go all the way and put full length ceramic headers on also to get the most flow improvement.
I have full-length headers on my '80. In order to get the left pipe to the right side of the car like original, the left pipe would have needed a 90 deg. bend just behind the collector. Sharp bends are bad for flow.
IMO, if you're converting to true dual exhaust, you should go all the way and put full length ceramic headers on also to get the most flow improvement.
