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| Dutra exhaust https://www.slantsix.org/forum/viewtopic.php?t=11681 |
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| Author: | 64 vert [ Tue Feb 08, 2005 6:32 pm ] |
| Post subject: | Dutra exhaust |
This will seem like a really dumb question. I'm fairly new to the site. Where can I get Dutra Exhaust for my 64 vert? What is the cost, and what are the advantages? Thanks in advance, |
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| Author: | slantvaliant [ Tue Feb 08, 2005 8:17 pm ] |
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http://www.dutra.org/doug/doug-sl6-exha ... -duals.htm Advantages over stock: less restriction, helping efficiency and/or power. Advantage over headers: more durable, possibly quieter, keeps heat for better cold weather driveability. Disadvantages: Heavier and more restrictive than headers, more expensive than stock. Pretty cool in my book! |
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| Author: | NewLancerMan [ Tue Feb 08, 2005 8:31 pm ] |
| Post subject: | Cost? |
About $225 I believe for the front, not sure on the rear (you can do it yourself with the screw-in method or welding method if you are able) if doug is selling those or not. |
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| Author: | Doctor Dodge [ Tue Feb 08, 2005 9:18 pm ] |
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Thanks guys, a good summary of the cast iron dual manifolds I make for the Slant. I can make-up rear sections for people as needed, send me a PM for more info and pricing. I have run Dutra Duals on my 66 Dart wagon for 15 years now, I got increased performance without any trouble, not even the cracking problem stock manifolds give you. DD |
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| Author: | Wesola78 [ Fri Feb 25, 2005 10:39 am ] |
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I've had Dutra Duals on my Volare for several years now. Even though the two pipes are just going back into one, I still like 'em. If nothing else, I don't have to worry about the exhaust manifold cracking in two. A worthwhile upgrade, in my opinion. |
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| Author: | Rust collector [ Fri Feb 25, 2005 11:51 am ] |
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What do you think about using the dd. on the rear, and modified stock in front? I have two stock manifolds, that has cracked or bent in the rear. Does it fit ok, and have room for ex.pipe? I guess it doesnt matter front or rear, but anyway... |
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| Author: | Doctor Dodge [ Sat Feb 26, 2005 10:24 am ] |
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Quote: What do you think about using the dd. on the rear, and modified stock in front?
You can mount it up that way but starter clearance is tight.I have two stock manifolds, that has cracked or bent in the rear. Does it fit ok, and have room for ex.pipe? I guess it doesnt matter front or rear, but anyway... There are many options including "non heat" rear sections. http://www.dutra.org/pictures/engine/pa ... p-side.jpg Also, if the manifold is warpped (not cracked) in the rear section, it is possible to re-align it by angle grinding the intake to exhaust manifold mating surface to get proper port alignment, then resurface the port face, as a set to ensure everything is flat. DD |
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| Author: | 64 Convert [ Sat Feb 26, 2005 11:12 am ] |
| Post subject: | |
Doug, have you ever thought about designing and selling an exhaust pipe to go along with your headers? I've put off installing mine because it's a 10 mile drive to the muffler shop to get a custom pipe built. It sure would be slick to have a bolt-on! |
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| Author: | SlantSixDan [ Sat Feb 26, 2005 11:30 am ] |
| Post subject: | |
I'm not Doug, but here's a big problem with designing "a" pipe for the Dutra Duals: Every car, with every equipment configuration, is a little different. It would be essentially impossible to design "a" pipe that would fit all the different cars and trucks and vans, with all the different engine bay configurations, with/without A/C, with/without P/S, with different type engine mounts, etc. And then, which kind of pipe would this be? Some people want dual 2", some want dual 2ΒΌ", some want 2-into-1, some need to wrap under the oil pan and run rearward on the RH side of the car...! |
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| Author: | Al Rose [ Sat Feb 26, 2005 2:07 pm ] |
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For what it's worth, there are, (within somewhat close proximity of race tracks), muffler shops that do custom work. They more often than not, have one of those gizzies that can cut exhaust tube with a hole saw, or whatever, at about any angle except 180, and fabricate from there. It sure beats doing it by yourself. If you do choose to go solo. I would ask that you, and all in the group, consider a note of caution here learned from experience. If you are going to weld under a vehicle with a wire feed welder, WEAR EAR PLUGS ! ! ! I did so without and had a ball of spatter find it's way into my ear canal. I remember the sensation of my ear wax boiling. I will say that the first human reaction is to relocate your head away from the pain, the trouble is, is, that the vheicle DOES NOT MOVE ! ! ! Afterwords your opinion will. Running duals all the way to the rear might be nice, however I would question the expense vs the results. Did, or, had done, my taxes Saturday. When George W. unloads, I plan on contacting "Dr D" for my set! B.P. Al |
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| Author: | SlantSixDan [ Sat Feb 26, 2005 2:39 pm ] |
| Post subject: | |
Quote: <snip a bunch of good advice and info on safety protection - Al, did your ear heal?>
Assuming you do your homework and choose your mufflers thoughtfully, the sound produced by duals all the way back without a balance tube will put a great big grin on your face each and every time you drive the car. That, in my opinion, is worth the price of admission.
Running duals all the way to the rear might be nice, however I would question the expense vs the results. |
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| Author: | Lancergt [ Sat Feb 26, 2005 5:40 pm ] |
| Post subject: | |
So what exhaust with the dutra duals sounds the toughest? 2 into 1 muffler then back out to duals or duals straight back? |
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| Author: | SlantSixDan [ Sat Feb 26, 2005 6:29 pm ] |
| Post subject: | |
Nope. Duals all the way back, including two individual mufflers, with no crossover. |
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| Author: | sandy in BC [ Sat Feb 26, 2005 7:04 pm ] |
| Post subject: | |
You would get most torque from 2" primary pipes about 30-32" long into a Flowmaster "Y" with a 2 1/2" outlet , single muffler and 2 1/2' tailpipe. You would need at least a 2 barrel to feed this. Chev used this in the early 80s on their high output 250 with progressive 2 barrel carb. They used a split manifold , nice equal, tuned length primaries and a largeish tail pipe. On the 250 the combination was worth about 15-20 HP over a comparable single exhaust 1 barrel. I used one in a 3/4 ton Suburban for 3 years,,,,a real screamer. I use tuned primary pipes to Flowmaster Y on all my fleet vehicles for max torque and fuel economy. Primary length depends on cam used and where the torque is desired in the RPM band. Cams used vary from 206(Comp 252) to 226 duration . Primary lengths and pipes sizes vary accordingly. If you want raw Decibels,,,,Dan has the answer. Mebbe headers and no mufflers could improve this. |
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| Author: | SlantSixDan [ Sat Feb 26, 2005 7:08 pm ] |
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Quote: You would get most torque...
Yep, very important to realise that the niftiest sounding setup is NOT the same as the torquiest setup. A common muffler (or twin mufflers, but with a balance pipe connecting the two exhaust pipes) will give better torque than a completely split system.
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