I sure like my set up......and very quiet, 2.5" most of the way. It is great on long commutes......just wind noise, that is it!
I never thought it was possible!
click on the red link below my name to view pictures.
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| Author: | valiant effort [ Wed Feb 27, 2013 7:30 am ] |
| Post subject: | Exhaust |
I recently took my temporary 225 and reinstalled the original 170. Unfortunately while I had the 225 in I had replaced the exhaust system which is now bumping the steering box because of the subtle difference in height of the two engines. Since I have to have the exhaust redone anyway, after much reading I think I could gain some performance by some modification to it. It is a daily driver so I am not lookiing for a lot of noise but I am looking for whatever improvements that can provided with a better system. Using a stock exhaust manifold what would be the optimum changes I could make, size of pipe, type of muffler etc. It presently has "fake" dual exhaust with what I think is 1 3/4 inch piping everywhere. Any comments are welcome..thanks, Mark |
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| Author: | Aggressive Ted [ Wed Feb 27, 2013 12:38 pm ] |
| Post subject: | |
I sure like my set up......and very quiet, 2.5" most of the way. It is great on long commutes......just wind noise, that is it! I never thought it was possible! click on the red link below my name to view pictures. |
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| Author: | valiant effort [ Wed Feb 27, 2013 2:45 pm ] |
| Post subject: | Exhaust |
Ted, Sounds good. What type of muffler did you go with or do you think my dual mufflers would be fine? I do like the sound of a quiet wind...thanks |
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| Author: | valiant effort [ Wed Feb 27, 2013 2:50 pm ] |
| Post subject: | exhaust |
By the way Ted I like the cold air intake. Homemade or from another vehicle? |
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| Author: | zorg [ Wed Feb 27, 2013 11:18 pm ] |
| Post subject: | |
Take a look around this thread as well: http://slantsix.org/forum/viewtopic.php?t=38978 |
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| Author: | valiant effort [ Thu Feb 28, 2013 4:24 am ] |
| Post subject: | Exhaust |
Thanks for the input. I will add to the thread when I do mine. I am leaning more toward a kinder gentler sound.. |
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| Author: | wjajr [ Thu Feb 28, 2013 5:49 am ] |
| Post subject: | |
Car is equipped with Clifford shorty headers drained by two inch duel pipes to back bumper, and 9.5:1 compression. I have had ear plug loud with plenty of drone with just burned out sonic turbo mufflers, not quite ear plug loud with some drone, and still can’t hear radio while under way with OEM stile aftermarket mufflers. As of last fall I installed two 12†[url=http://slantsix.org/forum/viewtopic.php?p=366970&highlight=muffler#366970]Flow Master HP mufflers[/url] ahead of the OEM cans. The shorter, less expensive, 12†HP muffler clips most of the nasty high tones inherent to straight six engines making for a mellow straight six sound not too different from what an old English performance six would make. I can mostly hear the radio over wind noise with top down, mechanical engine sounds, and slight rear end noise previously drowned out by exhaust note while under way. I even discovered at a particular speed over 55 mph there is a wind generated whistle when top is down. |
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| Author: | Sprag [ Thu Feb 28, 2013 11:03 am ] |
| Post subject: | |
All I can add here is try to resist any temptation to ditch the tailpipe(s). Your mileage may vary, but it has been my experience that even with a 'race' type muffler, a properly sized and bent tailpipe can dramatically reduce both the noise level and most of the other annoyances without taking a major hit on performance. Never again shall I dump the exhaust down before the axle or out the side in front of the rear tire(s). |
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| Author: | Aggressive Ted [ Thu Feb 28, 2013 9:45 pm ] |
| Post subject: | |
Quote: What type of muffler did you go with or do you think my dual mufflers would be fine? I do like the sound of a quiet wind...thanks
A 2.5" diameter Flow Master HP2 (18" long) and a Flow Master 70.74 Swinger, 9.5 comp 254/.435 lift cam, ram air, electric fans, 2.5" HP2 & FM70 exhaust, 1920 Holley#56 jet, 2.76 8 3/4 Sure-Grip, 26" tires, 25+MPG Take a look at the photos on the red link below my name. wjajr asked me about it and did the same. He likes the setup too! Quote: By the way Ted I like the cold air intake. Homemade or from another vehicle?
A $5 RV Sewer discharge fitting and 3" of hard pipe to a stock late 70's flex hose and stock late 70's air cleaner.
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| Author: | valiant effort [ Fri Mar 01, 2013 4:59 am ] |
| Post subject: | exhaust |
Looks good. And a lot of interesting pics. I am just now to the point where I can begin some of those upgrades. Looking forward to it. Thanks |
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| Author: | valiant effort [ Fri Mar 29, 2013 4:05 pm ] |
| Post subject: | exhaust |
I have the old exhaust removed and as I look at the space closely it appears that 2.5 inch pipe out of the factory manifold is going to be very very tight. It almost bumped the steering box with the 1.75 size pipe now. I would assume that the engine does move a bit on acceleration and I dont want it to bump if you know what i mean. Am I wrong or will it fit with a little effort. |
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| Author: | kesteb [ Fri Mar 29, 2013 9:49 pm ] |
| Post subject: | |
First off, you can't run 2 1/2" pipe off the stock manifold. That biggest flange that fits is 2 1/4". So you need a stub of 2 1/4" pipe that is expanded out to 2 1/2". Believe it or not, there is enough room to run a 2 1/2" pipe down past the pitman arm and the shift linkage bar. On our Duster, there is about 6" of 2 1/4" pipe bent at roughly a 60* angle. This is expanded out to 2 1/2" which runs out to the rear bumper. The muffler guy said this was the first setup like this that he has ever done on one these cars and he has been in business a long time. This system was worth 3 tenths at our local track. Our '65 Dart is running Dutra duals. I have snaked a pair of 2 1/8" pipes past the pitman arm and the Z bar. It is tight, but it works. These pipes connect to a 3" Flowmaster Y connector. The connecter exits at the transmission cross member. From there, the exhaust runs thru a 2 1/2" pipe that has the muffler dumping right before the rear axle. The Duster has a Maramont muffler, the Dart has a cheapy turbo muffler. They sound different, the Duster is quieter, the Dart is loud and nasty, but the exhaust for both is drowned out after 60 mph due to road/wind noise. |
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| Author: | valiant effort [ Sat Mar 30, 2013 9:13 am ] |
| Post subject: | Exhaust |
Thanks for the info. There is a custom exhaust shop near me so I can at least tell them what i want now. I will run 2 1/4 till im clear of everything and then expand up to 2.5 to and through the muffler which I am still deciding on. |
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| Author: | Aggressive Ted [ Fri Apr 05, 2013 2:01 pm ] |
| Post subject: | |
When you do it, get a thick exhaust flange for 2.25" pipe. That way you have a a good start. You can easily swage the 2.25" pipe up or slip 2.5" over it.....if you decide to go that big. |
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