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Old 04-26-2013, 09:57 PM
GrayhemiST GrayhemiST is offline
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Default Is the Y pipe worth it?

Hello Everyone,

Thinking about installing the Magnaflow Y pipe and eliminating the resonators. I already have a magnaflow 14' muffler.....is it worth the time and money? Any advice appreciated. Happy Hemi day!

Scott
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Old 04-26-2013, 10:20 PM
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I think, think mind you, that the factory y-pipe is designed the way it is to increase off-line torque and matched to the RPM that the engine runs 99% of the time. If I was going for better flow I would use the Flowmaster Y-Collector #Y214300. It has much better transition from 2 into 1 exhaust flow for better midrange and wide open throttle horse power. Mine, I'm leaving it stock, I like torque.
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Old 04-26-2013, 11:05 PM
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While oldhp's thought have merit, if you want to start flowing more air then the y-pipe is a must. The very design of the factory y-pipe makes me cringe when I think about the compression that the heated air stream has to undergo before it vents into a much larger reservoir, killing flow velocity and increasing backpressure.
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Old 04-27-2013, 05:41 PM
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I agree for better upper RPM flow you need bigger I.D. pipe. But that high compressed air velocity going into a large reservoir (3" O.D. pipe) is almost exactly like a torque pipe on motorcycle engine exhaust. They did it for reason I believe. If it caused that much of a restriction, wouldn't you think it would restrict MPG, let alone HP & torque?
I don't know tomato/tomatoe, only the exhaust/engine designers know for sure.
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Old 04-27-2013, 08:11 PM
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Yes, I believe it's a wise investment given is relative cheap price and install.

Equally important, and worth it, is the crimped LHS bank OEM pipe that runs under the trasmission.
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Old 04-27-2013, 09:08 PM
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For the best results increasing AirFlow into the engine is a must for this you are going to want a larger throttle body, and preferably and Vararam or S&B, (I prefer Vararam as it shows better numbers, and IMO looks 100 times but), when this is done changing the mid pipe between the cats and the y pipe is preferred, along with the crushed y pipe, and you already have a muffler ready to go so thats good , and of coarse a tuner with a custom tune, that is about the most you are going to get done as far as basic bolt on goes and you will not be disappointed that is for sure.

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Old 04-27-2013, 09:25 PM
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Thanks to everyone for your comments with this. When Im ready to spend $$ i'll be in touch with you Jeremiah
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Old 04-27-2013, 09:25 PM
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Quote:
Originally Posted by GrayhemiST View Post
Thanks to everyone for your comments with this. When Im ready to spend $$ i'll be in touch with you Jeremiah
Sounds good I will be here

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Old 04-27-2013, 09:43 PM
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Originally Posted by oldhp View Post
I agree for better upper RPM flow you need bigger I.D. pipe. But that high compressed air velocity going into a large reservoir (3" O.D. pipe) is almost exactly like a torque pipe on motorcycle engine exhaust. They did it for reason I believe. If it caused that much of a restriction, wouldn't you think it would restrict MPG, let alone HP & torque?
I don't know tomato/tomatoe, only the exhaust/engine designers know for sure.
Very good comparison sir! I also think the resrictive OE "Y" after the CAT's were made to function with the MDS. A little Backpressure is good from low to midrange but wide open throttle, no backpressure obviously is best.
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Old 04-27-2013, 09:57 PM
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I never thought of it that way with the MDS. Your right it would make even more sense the way it is designed.
Is anybody getting more MPG with the y-pipe modification and "not" using MDS?
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