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J Pipe Resonator

bayouguy71

By bayouguy71
in Engines & Drivetrain

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bayouguy71 Enthusiast

bayouguy71

Posted
Posted

I have decided after much reading that I am going to try a j pipe on my exhaust before my next road trip with the camper.

Flowmaster FX catback, sounds great except for a drone under load in the 1800-2000 range.

I have a shop that is going to look at it with me on Wednesday.

 

When doing the calculation I get basically 28-25 inches respectively.

 

My question is do you build for the longer length and it covers the whole range?

lucas287 Enthusiast

lucas287

Posted
Posted

I did a TON of research on this years ago fighting drone on my Mustang. Then again with my dad's SRT8 Charger. 

 

What we found was its best to make it adjustable because what works in theory plays out different in reality. Also, we found it most effective when the j pipe was the same diameter as the main pipe. 

 

One more thing, make it tee off 90 degrees for a good amount before turning it. 

 

Good luck! You likely find that it makes it overall quieter and cleaner sounding. It did in both cases for me. Lost that snarl and rasp. Not always a bad thing. 

bayouguy71 Enthusiast

bayouguy71

Posted
  • Author
Posted

Thanks, not really sure how to make it adjustable easily.

I could always make it 30 and cover a broader RPM range I suppuse.

 

Funny enough I took off the huge tip that came with this system and it actually helped so I have to believe that anything will help at this point.

 

 

rlcole321 Enthusiast

rlcole321

Posted
Posted

If you are doing this for a performance enhancement, then the Flowmaster muffler is not the best choice, you want a "Pass Thru" open muffler for better Bang for your buck, but if you are only looking for the "Sound" then your good!

bayouguy71 Enthusiast

bayouguy71

Posted
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Posted

Flowmaster FX is a pass through muffler.

I am not doing this for performance (the exhaust is already done)

 

I am trying to eliminate the drone on the installed Flowmaster FX cat back

 

lucas287 Enthusiast

lucas287

Posted
Posted
On 5/1/2021 at 5:18 PM, bayouguy71 said:

Thanks, not really sure how to make it adjustable easily.

I could always make it 30 and cover a broader RPM range I suppuse.

 

Funny enough I took off the huge tip that came with this system and it actually helped so I have to believe that anything will help at this point.

 

 

 

Sorry for not responding! Check out the way Solo does it,...

 

J-pipe or J-bend exhaust

lucas287 Enthusiast

lucas287

Posted
Posted
47 minutes ago, bayouguy71 said:

could do that I suppose and just clamp it into position right?

 

Yep! A lap joint clamp should work like this:

 

bayouguy71 Enthusiast

bayouguy71

Posted
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Posted

I am going to do this out of 409 SS just like the rest of my exhaust (gotta love the rust belt) 

Will SS stretch like that to make the slip joint?

 

bayouguy71 Enthusiast

bayouguy71

Posted
  • Author
Posted

Having this done next Friday and hopefully making it adjustable.

Exhaust shop had never seen this but understood what I wanted done.

Will get some pics and let you know how it sounds

 

lucas287 Enthusiast

lucas287

Posted
Posted
On 5/4/2021 at 3:37 PM, bayouguy71 said:

I am going to do this out of 409 SS just like the rest of my exhaust (gotta love the rust belt) 

Will SS stretch like that to make the slip joint?

 

I think solo exhaust kits are SS and 409 is a low grade of SS, so it should be fine? 

  • 2 weeks later...
bayouguy71 Enthusiast

bayouguy71

Posted
  • Author
Posted

Got this done Friday and am very pleased with the results.

I didn't get pics but you guys know what they look like 😉

He did make it adjustable, it will go from about 25 to about 29.

It is set at max right now and sounds so much better.

The test will come up in a couple weeks with the camper.

Byrds8 Enthusiast

Byrds8

Posted
Posted

I have the Solo exhaust on my truck. Its pretty mellow even with their loudest version. I removed the extendable portion of the J-pipe just to get a bit more db out of it. No drone. at all. Glad you got yours worked out. Drone sure can give a headache.

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