1971 Chrysler New Yorker:
- Thread starter 67newport
- Start date
This car is currently available for sale on Facebook in Pennsylvania and has been for several months now. The Aztec Gold exterior is my favorite one on these cars too, but I prefer the 2 door models, otherwise I would have bought it given its pristine condition and well optioned.
1971 Chrysler New Yorker
1971 Chrysler New Yorker · Sedan · Driven 47,000 miles Car is a true survivor. Original paint. 440 engine. Call 412 952 1309 if interested.
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darth_linux
Well-Known Member
Most interesting to me about this video was the chart towards the end of the video that showed the gross and net HP ratings of both the the 383 and 440 engines, with single exhaust vs. dual exhaust. Both engines when equipped with single exhaust exhibited ~30% less power when installed in the car, while the engines equipped with dual exhaust lost around ~18% HP. That to me sounds like going from single to dual exhaust nets 10%-12% more power.
Of course, the math could be meaningless, and this is just one anecdote. Plus we all know it's torque that makes these things move out, not HP, but regardless, how does that square with your own experiences or actual "dyno" data? Does dual exhaust give an instant 10-12% increase?
Of course, the math could be meaningless, and this is just one anecdote. Plus we all know it's torque that makes these things move out, not HP, but regardless, how does that square with your own experiences or actual "dyno" data? Does dual exhaust give an instant 10-12% increase?
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There were only a few model years where both power figures were given in the literature.
Rather than percentages, perhaps just "raw numbers" themselves can be best. Which would be in the 20horsepower range for a dual exhaust addition. One key thing is that this figure seemed to work best when the basic single exhaust system had smallish mufflers and piping. When Chrysler went to their more-generous pipe diameters in about 1972 and later, the "sewer pipe single" systems they had, when doubled, made for a pretty decent system, as to flow. At that time, they were seeming to focus on "flow" as a means to maintain good power output.
In the 1955 era, a "Power Pak" V-8 added dual exhaust and a 4bbl carb to the mix, for another 20 rated horsepower on a 300CID V-8. Consider that with the small piping used back then, it might well take TWO pipes to get close to the flow of the '72 Chrysler "sewer pipe single" exhaust system. 4bbls from back then were doing good to make 450cfm, too.
In reality, I suspect that only some with the most-well-calibrated "sensors" can really feel an extra 20 horsepower. What CAN happen is how much happier the engine SOUNDS at WOT and reacts to part-throttle input at highway speeds. NOT specifically air induction sounds or "sounds" of allegedly better aftermarket mufflers, just how happy the engine sounds. By observation, a "happy engine" will work the best and easiest in the particular rpm ranges of normal driving. AND increase driving enjoyment!
Enjoy!
CBODY67
Rather than percentages, perhaps just "raw numbers" themselves can be best. Which would be in the 20horsepower range for a dual exhaust addition. One key thing is that this figure seemed to work best when the basic single exhaust system had smallish mufflers and piping. When Chrysler went to their more-generous pipe diameters in about 1972 and later, the "sewer pipe single" systems they had, when doubled, made for a pretty decent system, as to flow. At that time, they were seeming to focus on "flow" as a means to maintain good power output.
In the 1955 era, a "Power Pak" V-8 added dual exhaust and a 4bbl carb to the mix, for another 20 rated horsepower on a 300CID V-8. Consider that with the small piping used back then, it might well take TWO pipes to get close to the flow of the '72 Chrysler "sewer pipe single" exhaust system. 4bbls from back then were doing good to make 450cfm, too.
In reality, I suspect that only some with the most-well-calibrated "sensors" can really feel an extra 20 horsepower. What CAN happen is how much happier the engine SOUNDS at WOT and reacts to part-throttle input at highway speeds. NOT specifically air induction sounds or "sounds" of allegedly better aftermarket mufflers, just how happy the engine sounds. By observation, a "happy engine" will work the best and easiest in the particular rpm ranges of normal driving. AND increase driving enjoyment!
Enjoy!
CBODY67
mrfury68
Senior Member
Great looking car in a really nice color combo & options list. I always liked the look of a 4 door hardtop, something very classy about it.
69CoronetRT
Senior Member
Simply changing the exhaust system doesn't account for the difference. The E86 U code dual exhaust engine assembly was different than the E85 T code single exhaust assembly.
Here's a '71 CH43 with the E86 U code engine. (This thread is one example as to WHY it is so important to get pictures of and save documents of cars. Doing so helps tell us how prevalent the U code engines actually were in 71 CH cars.)
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darth_linux
Well-Known Member
I noticed a BIG difference in how happy my engine sounded going from a single 2 inch exhaust to dual 2 1/2 inch exhaust. With the original exhaust system, it did not like me mashing the gas pedal at all, and at about 3500 RPM it would sound like it was starting to wheeze from the restrictive exhaust. Now with dual exhaust, I can basically mash the pedal to the floor and it will go, and it no longer sounds like it wants to die when I get to 3500 RPMs. It sounds like it wants to keep on going all the way to 5000. According to my questionable math skills, I basically tripled the amount of throughput of the exhaust system.
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